| 光谱学与光谱分析 |
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| Investigation on Performance Enhancement of Bulk Heterojunction Organic Solar Cells |
| SU Meng-chan1,YI Li-xin1,WANG Yang2,3,SHI Yu-meng1,LIANG Chun-jun1* |
1. Institute of Optoelectronics Technology, Beijing Jiaotong University, Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing 100044, China
2. Key Laboratory of Optoelectronics Technology and Intelligent Control, Ministry of Education，Lanzhou 730070, China
3. College of Science, Zhejiang Sci-Tech University, Hangzhou 310018, China |
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Abstract Four organic solar cells with the different structures were fabricated. The structures are Device1 ITO/LiF/PEDOT∶PSS/MEH-PPV/C60/Al, Device 2 ITO/PEDOT∶PSS/MEH-PPV/C60/Al, Device 3 ITO/LiF/PEDOT∶PSS/MEH-PPV ∶C60/C60/Al and Device 4 ITO/PEDOT∶PSS/MEH-PPV∶C60/C60/Al. Then we compared the current-voltage (I-V) characteristics of these devices and found that the insertion of a thin LiF layer between the ITO electrode and the PEDOT∶PSS layer resulted in much improved device performance. The short-circuit current density (JSC) and fill factor (FF) of Device 1 were enhanced by 74% and 31%, respectively as compared to those of Device 2. The short-circuit current density (JSC) of Device 3 is about 1.4 times as large as that of Device 4. The increased solar cell performance mostly can be attributed to the fact that the hole transport to the anode can be effectively suppressed by a thin LiF layer, and the thin LiF layer between the ITO electrode and the PEDOT∶PSS layer can form better interface properties. Hence, such change in structure of solar cells improves the performance of the organic solar cells effectively.
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Received: 2006-11-18
Accepted: 2007-02-16
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Corresponding Authors:
LIANG Chun-jun
E-mail: chjliang@science.njtu.edu.cn
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[1] CHU Xiang-qiang, XIE Da-tao, MENG Tie-jun, et al(储祥蔷，谢大弢，孟铁军，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003，23(4): 625.
[2] Shirakawa Hideki, Louis Edwin J, MacDiarmid Alan G, et al. Journal of the Chemical Society, Chemical Communications, 1977, (16): 578.
[3] Chiang C K, Fincher C R Jr, Park Y W, et al. Phys. Rev. Lett., 1977, 39(17-24): 1098.
[4] WEI Han-zhi, LI Wen-lian, SU Wen-ming, et al(魏晗志，李文连，苏文明, 等). Journal of Optoelectronics·Laser(光电子·激光)，2004，15(6)：750.
[5] LI Ying, XIE Minggui. Chinese Chemical Letters, 2002, 13(6): 509.
[6] Brown T M, Friend R H. Appl. Phys. Lett., 2000, 77: 3096.
[7] SU Yan-mei , HOU Yan-bing , CHEN Xiao-hong, et al(苏燕梅, 侯延冰, 陈晓红, 等). Chin. J. Lumin.(发光学报), 2002, 23(1): 37.
[8] Hung L S, Tang C W, Mason M G. Appl. Phys. Lett., 1997, 70: 152.
[9] Michio Matsumura, Yukitoshi Jinde. Applied Physics Letters, 1998, 73(20): 2872.
[10] Michio Matsumura, Keiichi Furukawa, Yukitoshi Jinde. Thin Solid Films, 1998, 331(1-2): 96.
[11] Jabbour G E, Kippelen B, Armstrong N R, et al. Appl. Phys. Lett., 1998, 73: 1185.
[12] XU Xue-mei, PENG Jing-cui, LI Hong-jian, et al(许雪梅，彭景翠，李宏建，等). Journal of Optoelectronics·Laser(光电子·激光)，2004, 15(5): 572.
[13] Masenelli B, Berner D, Bussac M N, et al. Appl. Phys. Lett., 2001, 79(26): 4438.
[14] Hung L S, Tang C W, Mason M G. Applied Physics Letters, 1997, 70(2): 152.
[15] LIN Peng, LIANG Chun-jun, DENG Zhen-bo, et al(林 鹏，梁春军，邓振波，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005，5(1): 23.
[16] Lee S T, Hou X Y, Mason M G, et al. Applied Physics Letters, 1998, 72(13): 1593.
[17] Hirose Y, Kahn A, Aristov V, et al. Phys. Rev. B, 1996, 54(19): 13748.
[18] Brabec Christoph J, Shaheen Sean E, Winder Christoph, et al. Applied Physics Letters, 2002, 80(7): 1288. |
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