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Seiji Niikura - One of the best experts on this subject based on the ideXlab platform.
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solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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Solvothermal synthesis of Zn2GeO4:Mn2+ nanophosphor in water/diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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size tunable solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
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Size-Tunable Solvothermal Synthesis of Zn2GeO4:Mn2 Nanophosphor in Water/Diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
Satoru Takeshita - One of the best experts on this subject based on the ideXlab platform.
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solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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Solvothermal synthesis of Zn2GeO4:Mn2+ nanophosphor in water/diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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size tunable solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
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Size-Tunable Solvothermal Synthesis of Zn2GeO4:Mn2 Nanophosphor in Water/Diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
Tetsuhiko Isobe - One of the best experts on this subject based on the ideXlab platform.
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solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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Solvothermal synthesis of Zn2GeO4:Mn2+ nanophosphor in water/diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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size tunable solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
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Size-Tunable Solvothermal Synthesis of Zn2GeO4:Mn2 Nanophosphor in Water/Diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
Tomohiro Sawayama - One of the best experts on this subject based on the ideXlab platform.
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solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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Solvothermal synthesis of Zn2GeO4:Mn2+ nanophosphor in water/diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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size tunable solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
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Size-Tunable Solvothermal Synthesis of Zn2GeO4:Mn2 Nanophosphor in Water/Diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
Joji Honda - One of the best experts on this subject based on the ideXlab platform.
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solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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Solvothermal synthesis of Zn2GeO4:Mn2+ nanophosphor in water/diethylene Glycol System
Journal of Solid State Chemistry, 2012Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Abstract The influence of aging of the suspension containing the amorphous precusors on structural, compositional and photoluminescent properties is studied to understand the mechanism on the formation of Zn 2 GeO 4 :Mn 2+ nanoparticles during the solvothermal reaction in the water/diethylene Glycol mixed solvent. Aging at 200 °C for 20 min forms the crystalline Zn 2 GeO 4 nanorods and then they grow up to ∼ 50 nm in mean length after aging for 240 min. Their interplanar spacing of (410) increases with increasing the aging time. The photoluminescence intensity corresponding to the d – d transition of Mn 2+ increases with increasing the aging time up to 120 min, and then decreases after aging for 240 min. The photoluminescence lifetime decreases with increasing the aging time, indicating the locally concentrated Mn 2+ ions. These results reveal that Mn 2+ ions gradually replace Zn 2+ ions near surface through repeating dissolusion and precipitation processes during prolonged aging after the complete crystallization of Zn 2 GeO 4 .
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size tunable solvothermal synthesis of zn2geo4 mn2 nanophosphor in water diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.
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Size-Tunable Solvothermal Synthesis of Zn2GeO4:Mn2 Nanophosphor in Water/Diethylene Glycol System
Crystal Growth & Design, 2010Co-Authors: Satoru Takeshita, Joji Honda, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji NiikuraAbstract:Zn2GeO4:Mn2+ nanophosphors are synthesized from germanium(IV) oxide and acetates of zinc and manganese(II) in a mixed solvent of water and diethylene Glycol (DEG) by the solvothermal reaction at 200 °C for 2 h. Phase pure Zn2GeO4:Mn2+ is obtained for the samples prepared at 0 ≤ xDEG ≤ 91.7, where xDEG is the volume percentage of DEG in the mixed solvent. The particle and crystallite sizes decrease with the increase in xDEG. The sample prepared at xDEG = 91.7 comprises the nanorods with 30.2 and 12.2 nm in mean length and width, respectively. The actual Mn concentration measured by X-ray fluorescence analysis increases with the increase in xDEG and approaches to the nominal concentration, 2.0 at %. The samples show green luminescence corresponding to the d−d transition of Mn2+ under the irradiation of UV and near-UV light. The photoluminescence intensity reaches a maximum around xDEG ∼ 80. This is attributed to the competitive factors, the Mn concentration and the sizes of crystallites and particles.