Microscopic description of the current-voltage characteristics of a bulk-heterojunction organic solar cell under illumination

被引：6
|
作者：
Takeuchi, Osamu [1 ]
Takeuchi, Noriaki [1 ]
Ochiai, Takahiro [1 ,2 ]
Kato, Hirokazu [1 ]
Yoshida, Shoji [1 ]
Shigekawa, Hidemi [1 ]
机构：
[1] Univ Tsukuba, Fac Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan
[2] TAKANO Co Ltd, Nagano 3994301, Japan
来源：
APPLIED PHYSICS EXPRESS | 2014年 / 7卷 / 02期
关键词：
ATOMIC-FORCE MICROSCOPY; ELECTRICAL CHARACTERIZATION; SPACE-CHARGE; POLYMER;
D O I：
10.7567/APEX.7.021602
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Measurement of the local current-voltage (J-V) characteristics of a MDMO-PPV:PCBM bulk-heterojunction (BHJ) solar cell by using light-modulated scanning tunneling spectroscopy (LM-STS) revealed that the open-circuit voltage (V-OC) differs from one region to another. Consequently, when the bias voltage is set near V-OC, the generated photocurrent in some regions is internally lost in other regions through leakage. In the same manner, the external J-V characteristics of a BHJ solar cell device results from numerous parallelly connected local solar cells. LM-STS allows us to interpret the external J-V characteristics of a device in terms of the characteristics of the local solar cells. (C) 2014 The Japan Society of Applied Physics
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页数：4
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