The Experts below are selected from a list of 171 Experts worldwide ranked by ideXlab platform
Yuansheng Wang - One of the best experts on this subject based on the ideXlab platform.
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narrow band red emitting kznf3 mn4 fluoroperovskites insights into electronic Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
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Narrow-band red-emitting KZnF3:Mn4+ fluoroperovskites: insights into electronic/Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
Tao Hu - One of the best experts on this subject based on the ideXlab platform.
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narrow band red emitting kznf3 mn4 fluoroperovskites insights into electronic Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
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Narrow-band red-emitting KZnF3:Mn4+ fluoroperovskites: insights into electronic/Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
Andrea Amadei - One of the best experts on this subject based on the ideXlab platform.
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theoretical modeling of uv vis absorption and emission spectra in liquid state systems including vibrational and conformational effects the vertical Transition approximation
Journal of Chemical Physics, 2013Co-Authors: Maira Dalessandro, Massimiliano Aschi, Claudia Mazzuca, A Palleschi, Andrea AmadeiAbstract:In this paper we describe in detail a general and efficient methodology, based on the perturbed matrix method and molecular dynamics simulations, to model UV-Vis absorption and emission spectra including vibrational and conformational effects. The basic approximation used is to consider all the chromophore atomic coordinates as semiclassical degrees of freedom, hence allowing the calculation of the complete spectral signal by using the electronic vertical Transitions as obtained at each possible chromophore configuration, thus including the contributions of vibrations and conformational Transitions into the spectrum. As shown for the model system utilized in this paper, solvated 1-phenyl-naphthalene, such an approximation can be rather accurate to reproduce the absorption and emission spectral line shape and properties when, as it often occurs, the vertical Vibronic Transition largely overlaps the other non-negligible Vibronic Transitions.
Yao Cheng - One of the best experts on this subject based on the ideXlab platform.
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narrow band red emitting kznf3 mn4 fluoroperovskites insights into electronic Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
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Narrow-band red-emitting KZnF3:Mn4+ fluoroperovskites: insights into electronic/Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
Ju Xu - One of the best experts on this subject based on the ideXlab platform.
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narrow band red emitting kznf3 mn4 fluoroperovskites insights into electronic Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
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Narrow-band red-emitting KZnF3:Mn4+ fluoroperovskites: insights into electronic/Vibronic Transition and thermal quenching behavior
Journal of Materials Chemistry C, 2018Co-Authors: Tao Hu, Yao Cheng, Ju Xu, Yuansheng WangAbstract:Mn4+ activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/Vibronic Transition and thermal quenching behavior of Mn4+ are insufficient. In this work, a new red-emitting KZnF3:Mn4+ fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/Vibronic Transitions for Mn4+ and [F2−] defect centers are identified, the slight distortion of the [MnF6]2− octahedron deviating from Oh symmetry is disclosed, and multiple crystallographic site occupation of Mn4+ is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal Oh symmetry reveals its close dependence on the 4T2g energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
