The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Liangbing Gan - One of the best experts on this subject based on the ideXlab platform.
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open cage Fullerene with a stopper acts as a molecular vial for a single water molecule
Organic chemistry frontiers, 2015Co-Authors: Sisi Liang, Liangbing Gan, Jiahao SunAbstract:An open-cage Fullerene Derivative with three carbonyl groups on the rim of the orifice reacts with o-diaminobenzene reversibly to form a tetrahydrofuran moiety above the orifice. Water encapsulation and release experiments show that the tetrahydrofuran moiety acts as a stopper effectively blocking the orifice. The addition and removal of o-diaminobenzene serve as a chemically controlled switching process for the Fullerene-based water container, which is suited for just one water molecule due to its moderate cavity size.
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synthesis of c60 o 3 an open cage Fullerene with a ketolactone moiety on the orifice
ChemInform, 2013Co-Authors: Nana Xin, Xiaobing Yang, Zishuo Zhou, Jianxin Zhang, Showxin Zhang, Liangbing GanAbstract:In addition to the four isomers currently known for the trioxygenated Fullerene Derivative C60(O)3, a new open-cage isomer is prepared through a three-step procedure mediated by a peroxide.
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head to tail and back to back dimerization of an open cage Fullerene Derivative through π π interaction based self assembly
Organic Letters, 2012Co-Authors: Shuming Liu, Qianyan Zhang, Liangbing GanAbstract:Open-cage Fullerene Derivative 2, C59(O)4(NAr)2 (Ar = p-tBuC6H4), was prepared from 1, C60(O)4(OH)2(NAr)2, through processes involving decarbonylation and elimination of the two hydroxyl groups. The phenyl groups in compound 2 act as chelating ligands for the Fullerene cage and induce partial dimerization of 2 in solution. The single crystal X-ray structure of 2 shows strong intradimer π–π interactions and also weaker interdimer CH−π and π–π interactions.
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head to tail and back to back dimerization of an open cage Fullerene Derivative through π π interaction based self assembly
Organic Letters, 2012Co-Authors: Shuming Liu, Qianyan Zhang, Liangbing GanAbstract:Open-cage Fullerene Derivative 2, C59(O)4(NAr)2 (Ar = p-tBuC6H4), was prepared from 1, C60(O)4(OH)2(NAr)2, through processes involving decarbonylation and elimination of the two hydroxyl groups. Th...
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synthesis of 18 membered open cage Fullerenes through controlled stepwise Fullerene skeleton bond cleavage processes and substituent mediated tuning of the redox potential of open cage Fullerenes
Journal of Organic Chemistry, 2011Co-Authors: Xiang Xie, Shuming Liu, Tong Zhang, Yuanhua Shao, Liangbing GanAbstract:Oxidation of the Fullerenediol C60(OH)2(O)(OAc)(OOtBu)3 with PhI(OAc)2 yields the open-cage Fullerene Derivative C60(O)2(O)(OAc)(OOtBu)32 with an 11-membered orifice. Compound 2 reacts with aniline to form a new open-cage Derivative with a 14-membered orifice, which yields an 18-membered open-cage Fullerene Derivative upon addition of another molecule of aniline. Two different types of aniline Derivatives with either electron-donating or electron-withdrawing substituents can be added sequentially, affording an unsymmetrical moiety in the open-cage structure. Reduction potentials of the 18-membered open-cage Fullerene Derivatives can be fine-tuned by changing the substituents on the aniline. The results provide new insights about the mechanism of open-cage reactions of Fullerene-mixed peroxide.
Show-an Chen - One of the best experts on this subject based on the ideXlab platform.
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a high performance inverted organic solar cell with a low band gap small molecule p dts fbtth2 2 using a Fullerene Derivative doped zinc oxide nano film modified with a Fullerene based self assembled monolayer as the cathode
Journal of Materials Chemistry, 2015Co-Authors: Sih Hao Liao, Hong Jyun Jhuo, Yu Shan Cheng, Vinay Gupta, Show-an ChenAbstract:We have successfully integrated two effective strategies to improve the power conversion efficiency (PCE) of bulk heterojunction inverted small molecule solar cells (i-SMSCs) by doping a ZnO cathode with a Fullerene Derivative (ZnO–C60) followed by Fullerene Derivative self-assembled monolayer (SAM) modification on its surface in contact with the active layer. Such ZnO–C60 gives a Fullerene-Derivative-rich interface in contact with the active layer and enhanced surface conductivity relative to pristine ZnO (from 0.015 to 1.09 S cm−1) and bulk electron mobility (from 1.23 ± 0.39 × 10−4 to 6.43 ± 0.35 × 10−3 cm2 V−1 s−1). Using this ZnO–C60 as the cathode, the device with the active layer p-DTS(FBTTh2)2:PC71BM gives a higher PCE of 8.3% than that using ZnO without doping, 6.08%. Further incorporation of Fullerene Derivatives (NPC60-OH and NPC70-OH) as a SAM on ZnO–C60 effectively passivates the electron traps on the ZnO–C60 surface, resulting in increased electron mobility. The device using the ZnO–C60 nanofilm with phenol substituted C70 (NPC70-OH) as the SAM gives a further promoted PCE of up to 9.14%, which is the best value among the reported values in i-SMSCs.
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single junction inverted polymer solar cell reaching power conversion efficiency 10 31 by employing dual doped zinc oxide nano film as cathode interlayer
Scientific Reports, 2015Co-Authors: Sih Hao Liao, Hong Jyun Jhuo, Yu Shan Cheng, Ponan Yeh, Yuhsuan Lee, Sunil Sharma, Show-an ChenAbstract:We present high efficiency and stable inverted PSCs (i-PSC) by employing sol-gel processed simultaneously doped ZnO by Indium and Fullerene Derivative (BisNPC60-OH) (denoted as InZnO-BisC60) film as cathode interlayer and PTB7-Th:PC71BM as the active layer (where PTB7-Th is a low bandgap polymer we proposed previously). This dual-doped ZnO, InZnO-BisC60, film shows dual and opposite gradient dopant concentration profiles, being rich in Fullerene Derivative at the cathode surface in contact with active layer and rich in In at the cathode surface in contact with the ITO surface. Such doping in ZnO not only gives improved surface conductivity by a factor of 270 (from 0.015 to 4.06 S cm−1) but also provides enhanced electron mobility by a factor of 132 (from 8.25*10−5 to 1.09*10−2 cm2 V−1 s−1). The resulting i-PSC exhibits the improved PCE 10.31% relative to that with ZnO without doping 8.25%. This PCE 10.31% is the best result among the reported values so far for single junction PSC.
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Fullerene Derivative-doped zinc oxide nanofilm as the cathode of inverted polymer solar cells with low-bandgap polymer (PTB7-Th) for high performance
Advanced Materials, 2013Co-Authors: Sih Hao Liao, Hong Jyun Jhuo, Yu Shan Cheng, Show-an ChenAbstract:Modification of a ZnO cathode by doping it with a hydroxyl-containing Derivative - giving a ZnO-C60 cathode - provides a Fullerene-Derivative-rich surface and enhanced electron conduction. Inverted polymer solar cells with the ZnO-C60 cathode display markedly improved power conversion efficiency compared to those with a pristine ZnO cathode, especially when the active layer includes the low-bandgap polymer PTB7-Th.
P A Troshin - One of the best experts on this subject based on the ideXlab platform.
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non covalent complexes of polycationic Fullerene c60 Derivative with xanthene dyes spectral and photochemical properties in water and in liposomes
Dyes and Pigments, 2017Co-Authors: Alexandra Yu Belik, N S Goryachev, P A Troshin, Alexander Yu Rybkin, Ilya I Voronov, Dmytro Volyniuk, Juozas V Grazulevicius, A I KotelnikovAbstract:Abstract By the use of absorption spectroscopy, steady-state and time resolved fluorimetry xanthene dyes fluorescein, eosin Y and erythrosin B were shown to form complexes with polycationic Fullerene Derivative due to electrostatic interactions in aqueous solution and in the structure of the liposomes. It was found that the singlet excited states of dyes are effectively quenched either due to excitation energy transfer or electron transfer from singlet excited state of the dye to the Fullerene core. Photodynamic activity of the complex is much higher than the activity of the dye or the Fullerene Derivative as the individual compounds. Photostability of the dyes increases in the complex structure as well. These effects allow predicting the development of a new generation hybrid photosensitizers. Noteworthy, one can use a dye excited only in a singlet state in combination with Fullerene, which greatly enhances the directional design of such hybrid structures.
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photodynamic activity of hybrid nanostructure on the basis of polycationic Fullerene Derivative and xanthene dye eosine y
Nanotechnologies in Russia, 2012Co-Authors: A V Barinov, Yu A Rybkin, N S Goryachev, P A Troshin, D A Poletaeva, Alexey B Kornev, Franzjosef Schmitt, G Renger, H J Eichler, A I KotelnikovAbstract:It has been shown by the use of steady-state and time-resolved fluorimetry and kinetic phosphorescent spectroscopy that a polycationic Fullerene Derivative forms complexes with eosine Y in solution due to electrostatic interactions. It has been found that singlet excited states of eosine Y are effectively quenched due to either the excitation energy transfer or electron transfer from the dye to the Fullerene core. This leads to a substantial increase in the photodynamic activity of the Fullerene Derivative and the dye in the structure of the complex when it is excited by light in the absorption band of the dye.
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material solubility photovoltaic performance relationship in the design of novel Fullerene Derivatives for bulk heterojunction solar cells
Advanced Functional Materials, 2009Co-Authors: P A Troshin, Harald Hoppe, Alexander S Peregudov, Joachim Renz, Martin Egginger, Julia Yu Mayorova, Andrey E Goryachev, R N Lyubovskaya, Gerhard Gobsch, Serdar N SariciftciAbstract:The preparation of 27 different Derivatives of C60 and C70 Fullerenes possessing various aryl (heteroaryl) and/or alkyl groups that are appended to the Fullerene cage via a cyclopropane moiety and their use in bulk heterojunction polymer solar cells is reported. It is shown that even slight variations in the molecular structure of a compound can cause a significant change in its physical properties, in particular its solubility in organic solvents. Furthermore, the solubility of a Fullerene Derivative strongly affects the morphology of its composite with poly(3-hexylthiophene), which is commonly used as active material in bulk heterojunction organic solar cells. As a consequence, the solar cell parameters strongly depend on the structure and the properties of the Fullerene-based material. The power conversion efficiencies for solar cells comprising these Fullerene Derivatives range from negligibly low (0.02%) to considerably high (4.1%) values. The analysis of extensive sets of experimental data reveals a general dependence of all solar cell parameters on the solubility of the Fullerene Derivative used as acceptor component in the photoactive layer of an organic solar cell. It is concluded that the best material combinations are those where donor and acceptor components are of similar and sufficiently high solubility in the solvent used for the deposition of the active layer.
Thomas D Anthopoulos - One of the best experts on this subject based on the ideXlab platform.
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high speed ultraviolet phototransistors based on an ambipolar Fullerene Derivative
ACS Applied Materials & Interfaces, 2018Co-Authors: Wentao Huang, Thomas D Anthopoulos, Yenhung LinAbstract:Combining high charge carrier mobility with ambipolar transport in light-absorbing organic semiconductors is highly desirable as it leads to enhanced charge photogeneration, and hence improved performance, in various optoelectronic devices including solar cells and photodetectors. Here we report the development of [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM)-based ultraviolet (UV) phototransistors with balanced electron and hole transport characteristics. The latter is achieved by fine-tuning the source-drain electrode work function using a self-assembled monolayer. Opto/electrical characterization of as-prepared ambipolar PC61BM phototransistors reveals promising photoresponse, particularly in the UV-A region (315-400 nm), with a maximum photosensitivity and responsivity of 9 × 103 and 3 × 103 A/W, respectively. Finally, the temporal response of the PC61BM phototransistors is found to be high despite the long channel length (10 s of μm) with typical switching times of <2 ms.
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air stable n channel organic transistors based on a soluble c84 Fullerene Derivative
Advanced Materials, 2006Co-Authors: Thomas D Anthopoulos, Floris B Kooistra, Harry J Wondergem, David F Kronholm, Jan C Hummelen, Dago M De LeeuwAbstract:Air-stable n-channel organic transistors are fabricated using a newly synthesized soluble Fullerene Derivative. The airstable nature of this molecule allows the realization of complementary circuits under ambient conditions without encapsulation. As shown in the figure, the I-V characteristics of the devices are retained even after exposure to air for a week. To the best of our knowledge, this is the first demonstration of an air-stable electron-transporting Fullerene-based molecule.
Sih Hao Liao - One of the best experts on this subject based on the ideXlab platform.
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a high performance inverted organic solar cell with a low band gap small molecule p dts fbtth2 2 using a Fullerene Derivative doped zinc oxide nano film modified with a Fullerene based self assembled monolayer as the cathode
Journal of Materials Chemistry, 2015Co-Authors: Sih Hao Liao, Hong Jyun Jhuo, Yu Shan Cheng, Vinay Gupta, Show-an ChenAbstract:We have successfully integrated two effective strategies to improve the power conversion efficiency (PCE) of bulk heterojunction inverted small molecule solar cells (i-SMSCs) by doping a ZnO cathode with a Fullerene Derivative (ZnO–C60) followed by Fullerene Derivative self-assembled monolayer (SAM) modification on its surface in contact with the active layer. Such ZnO–C60 gives a Fullerene-Derivative-rich interface in contact with the active layer and enhanced surface conductivity relative to pristine ZnO (from 0.015 to 1.09 S cm−1) and bulk electron mobility (from 1.23 ± 0.39 × 10−4 to 6.43 ± 0.35 × 10−3 cm2 V−1 s−1). Using this ZnO–C60 as the cathode, the device with the active layer p-DTS(FBTTh2)2:PC71BM gives a higher PCE of 8.3% than that using ZnO without doping, 6.08%. Further incorporation of Fullerene Derivatives (NPC60-OH and NPC70-OH) as a SAM on ZnO–C60 effectively passivates the electron traps on the ZnO–C60 surface, resulting in increased electron mobility. The device using the ZnO–C60 nanofilm with phenol substituted C70 (NPC70-OH) as the SAM gives a further promoted PCE of up to 9.14%, which is the best value among the reported values in i-SMSCs.
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single junction inverted polymer solar cell reaching power conversion efficiency 10 31 by employing dual doped zinc oxide nano film as cathode interlayer
Scientific Reports, 2015Co-Authors: Sih Hao Liao, Hong Jyun Jhuo, Yu Shan Cheng, Ponan Yeh, Yuhsuan Lee, Sunil Sharma, Show-an ChenAbstract:We present high efficiency and stable inverted PSCs (i-PSC) by employing sol-gel processed simultaneously doped ZnO by Indium and Fullerene Derivative (BisNPC60-OH) (denoted as InZnO-BisC60) film as cathode interlayer and PTB7-Th:PC71BM as the active layer (where PTB7-Th is a low bandgap polymer we proposed previously). This dual-doped ZnO, InZnO-BisC60, film shows dual and opposite gradient dopant concentration profiles, being rich in Fullerene Derivative at the cathode surface in contact with active layer and rich in In at the cathode surface in contact with the ITO surface. Such doping in ZnO not only gives improved surface conductivity by a factor of 270 (from 0.015 to 4.06 S cm−1) but also provides enhanced electron mobility by a factor of 132 (from 8.25*10−5 to 1.09*10−2 cm2 V−1 s−1). The resulting i-PSC exhibits the improved PCE 10.31% relative to that with ZnO without doping 8.25%. This PCE 10.31% is the best result among the reported values so far for single junction PSC.
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Fullerene Derivative-doped zinc oxide nanofilm as the cathode of inverted polymer solar cells with low-bandgap polymer (PTB7-Th) for high performance
Advanced Materials, 2013Co-Authors: Sih Hao Liao, Hong Jyun Jhuo, Yu Shan Cheng, Show-an ChenAbstract:Modification of a ZnO cathode by doping it with a hydroxyl-containing Derivative - giving a ZnO-C60 cathode - provides a Fullerene-Derivative-rich surface and enhanced electron conduction. Inverted polymer solar cells with the ZnO-C60 cathode display markedly improved power conversion efficiency compared to those with a pristine ZnO cathode, especially when the active layer includes the low-bandgap polymer PTB7-Th.
