Optical and electrical properties of a squaraine dye in photovoltaic cells

被引：52

作者：

Chen, Guo ^{[1
,2
]}

Yokoyama, Daisuke ^{[1
,2
]}

Sasabe, Hisahiro ^{[1
,2
]}

Hong, Ziruo ^{[1
,2
]}

Yang, Yang ^{[3
]}

Kido, Junji ^{[1
,2
]}

机构：

[1] Yamagata Univ, Dept Organ Device Engn, Grad Sch Engn, Yonezawa, Yamagata 9928510, Japan

[2] Yamagata Univ, Res Ctr Organ Elect ROEL, Yonezawa, Yamagata 9928510, Japan

[3] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 08期

基金：

日本科学技术振兴机构;

关键词：

HETEROJUNCTION SOLAR-CELLS; EFFICIENCY; DONORS;

D O I：

10.1063/1.4747623

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

2,4-Bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl] squaraine (SQ) was employed as a donor material in organic photovoltaic cells based on planar heterojunctions. We studied optical properties of SQ films, and discussed its photovoltaic performance via numerical fitting and simulation on the photovoltaic cells. Exciton diffusion length (L-D) in SQ films (4.5 nm) derived from optical simulation should be the major limitation to efficiency, consistent with external quantum efficiency data. Thermal treatment improved efficiency, which can be ascribed to reduced saturation current of the photovoltaic cells. As a result, a power conversion efficiency of 4.1% was achieved. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4747623]

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页数：4

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