| Enhanced Efficiency of Polymer： Fullerene Bulk Heterojunction Solar Cells with the Insertion of Thin TiO2 Layer near the LiF/A1 Electrode |
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| 引用本文： | 李妍,侯延冰,靳辉,师全民,刘军,孙鑫,常笑薇.Enhanced Efficiency of Polymer： Fullerene Bulk Heterojunction Solar Cells with the Insertion of Thin TiO2 Layer near the LiF/A1 Electrode[J].中国物理快报,2007,24(3):818-821. |
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| 作者姓名： | 李妍 侯延冰 靳辉 师全民 刘军 孙鑫 常笑薇 |
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| 作者单位： | Key Laboratory of Luminescence and Optical Information （Ministry of Education）, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044 |
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| 基金项目： | Supported by the Trans-Century Training Programme for the Talents of Natural Science by the State Education Commission, Key Project of the Ministry of Education of China under Grant No 105041, the National Natural Science Foundation of China under Grant Nos 90401006, 10434030 and 90301004, and the National Basic Research Program of China under Grant No 2003CB314707. |
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| 摘 要： | The insertion layer of TiO2 between polymer-fullerene blend and LiF/AI electrode is used to enhance the shortcircuit current Isc and fill factor （FF）. The solar cell based on the blend of poly2-methoxy-5-（2＇-ethylhexyloxy）- 1,4-phenylenevinylene] （MEH-PPV） and C60 with the modifying layer of TiO2 （about 20nm） shows the open- circuit Voc of about 0.62 V, short circuit current Isc of about 2.35 mA/cm^2, filling factor FF of about 0.284, and the power conversion efficiency （PCE） of about 2.4% under monochromatic light （50Onto） photoexcitation of about 17mW/cm^2. Compared to ceils without the TiO2 layer, the power conversion efficiency increases by about 17.5%. Similar effect is also obtained in cells with the undoped MEH-PPV structure of ITO/PEDOT：PASS/MEH- PPV/（TiO2）LiF/AI. The improved solar cell performance can be attributed to enhanced carrier extraction efficiency at the active layer/electrode interfaces when TiO2 is inserted.
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| 关 键 词： | 聚合物 异质结 电极 物理学 |
| 收稿时间： | 2006-11-14 |
| 修稿时间： | 2006-11-14 |
Enhanced Efficiency of Polymer: Fullerene Bulk Heterojunction Solar Cells with the Insertion of Thin TiO2 Layer near the LiF/Al Electrode |
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| LI Yan,HOU Yan-Bing,JIN Hui,SHI Quan-Min,LIU Jun,SUN Xin,CHANG Xiao-Wei.Enhanced Efficiency of Polymer: Fullerene Bulk Heterojunction Solar Cells with the Insertion of Thin TiO2 Layer near the LiF/Al Electrode[J].Chinese Physics Letters,2007,24(3):818-821. |
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| Authors: | LI Yan HOU Yan-Bing JIN Hui SHI Quan-Min LIU Jun SUN Xin CHANG Xiao-Wei |
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| Affiliation: | Key Laboratory or Luminescence and Optical Information (Ministry or Education |
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| Abstract: | The insertion layer of TiO2 between polymer-fullerene blend and LiF/Al electrode is used to enhance the short-circuit current I sc and fill factor (FF). The solar cell based on the blend of poly2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and C60 with the modifying layer of TiO2 (about 20nm) shows the open-circuit Voc of about 0.62V, short circuit current Isc of about 2.35mA/cm2, filling factor FF of about 0.284, and the power conversion efficiency (PCE) of about 2.4% under monochromatic light (500nm) photoexcitation of about 17mW/cm 2. Compared to cells without the TiO2layer, the power conversion efficiency increases by about 17.5%. Similar effect is also obtained in cells with the undoped MEH-PPV structure of ITO/PEDOT:PASS/MEH-PPV/(TiO2)LiF/Al. The improved solar cell performance can be attributed to enhanced carrier extraction efficiency at the active layer/electrode interfaces when TiO2 is inserted. |
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| Keywords: | 72 40 +w 72 80 Le |
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