| Solvent and electric field dependence of the photocurrent generation in donor：acceptor blend system |
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| 引用本文： | 周印华,杨中锋,吴伟才,夏海建,温善鹏,田文晶. Solvent and electric field dependence of the photocurrent generation in donor：acceptor blend system[J]. 中国物理, 2007, 16(7): 2136-2141. DOI: 10.1088/1009-1963/16/7/057 |
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| 作者姓名： | 周印华 杨中锋 吴伟才 夏海建 温善鹏 田文晶 |
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| 作者单位： | Key Laboratory for Supramolecular Structure andMaterials of Ministry of Education, Jilin University,Changchun 130012, China |
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| 基金项目： | Project supported by the StateKey Development Program for Basic Research of China (Grant No2002CB613401), the National Natural Science Foundation of China(Grant Nos 20474023 and 50673035), the Program for ChangjiangScholars and Innovative Research Tea |
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| 摘 要： | This paper reports that the blend films of poly(2-methoxy-5-(2'-ethyl-hexyloxy)-p-phenylene vinylene) (MEH-PPV)and N,N'-bis(1-ethylpropyl)-3,4: 9,10-perylene bis(tetracarboxyl diimide) (EP-PDI) with the weight ratio of 1:2.5have been prepared by spin-coating from chloroform (CF) andchlorobenzene (CB) solutions respectively. The absorptionspectra and the morphology of the blend films show that largecrystal-like EP-PDI aggregates are formed in film prepared fromCB solution, which corresponds to a new absorption shoulder near590nm, while there is no shoulder around 590,nm in theUV--Vis absorption spectra of the blend film from CF solution.The electric-field dependence spectra of the photocurrentgeneration quantum yield of the film from CB solution shows thatat weak electric field the EP-PDI aggregates act as moreefficient sensitizers, but at strong electric field the quantumyields become almost invariable over the entire spectral rangeno matter what the state of EP-PDI, monomer or aggregate. Atstrong electric field, the photocurrent generation yields ofboth films from CF and CB solution saturate and their yieldspectra become spectrally similar, mentioning that at strongelectric field the photoexcitons dissociate efficiently and thefree charges are collected by the electrodes almost completely.
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| 关 键 词： | 溶媒效果 形态学 电子 光电流 |
| 收稿时间： | 2006-12-01 |
| 修稿时间： | 2006-12-012006-12-10 |
Solvent and electric field dependence of the photocurrent generation in donor:acceptor blend system |
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| Zhou Yin-Hu,Yang Zhong-Feng,Wu Wei-Cai,Xia Hai-Jian,Wen Shan-Peng and Tian Wen-Jing. Solvent and electric field dependence of the photocurrent generation in donor:acceptor blend system[J]. Chinese Physics, 2007, 16(7): 2136-2141. DOI: 10.1088/1009-1963/16/7/057 |
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| Authors: | Zhou Yin-Hu Yang Zhong-Feng Wu Wei-Cai Xia Hai-Jian Wen Shan-Peng Tian Wen-Jing |
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| Affiliation: | Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, Changchun 130012, China |
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| Abstract: | This paper reports that the blend films of poly(2-methoxy-5-(2'-ethyl-hexyloxy)-p-phenylene vinylene) (MEH-PPV)and N,N'-bis(1-ethylpropyl)-3,4: 9,10-perylene bis(tetracarboxyl diimide) (EP-PDI) with the weight ratio of 1:2.5have been prepared by spin-coating from chloroform (CF) andchlorobenzene (CB) solutions respectively. The absorptionspectra and the morphology of the blend films show that largecrystal-like EP-PDI aggregates are formed in film prepared fromCB solution, which corresponds to a new absorption shoulder near590nm, while there is no shoulder around 590,nm in theUV--Vis absorption spectra of the blend film from CF solution.The electric-field dependence spectra of the photocurrentgeneration quantum yield of the film from CB solution shows thatat weak electric field the EP-PDI aggregates act as moreefficient sensitizers, but at strong electric field the quantumyields become almost invariable over the entire spectral rangeno matter what the state of EP-PDI, monomer or aggregate. Atstrong electric field, the photocurrent generation yields ofboth films from CF and CB solution saturate and their yieldspectra become spectrally similar, mentioning that at strongelectric field the photoexcitons dissociate efficiently and thefree charges are collected by the electrodes almost completely. |
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| Keywords: | solvent effect morphology electric field dependence photocurrent generation |
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