Optical anisotropy in solvent-modified poly(3,4-ethylenedioxythiophene): poly(styrenesulfonic acid) and its effect on the photovoltaic performance of crystalline silicon/organic heterojunction solar cells

被引：41

作者：

Liu, Qiming ^{[1
]}

Imamura, Takashi ^{[1
]}

Hiate, Taiga ^{[1
]}

Khatri, Ishwor ^{[1
]}

Tang, Zeguo ^{[1
]}

Ishikawa, Ryo ^{[1
]}

Ueno, Keiji ^{[1
]}

Shirai, Hajime ^{[1
]}

机构：

[1] Saitama Univ, Grad Sch Sci & Engn, Saitama 3388570, Japan

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 24期

基金：

日本科学技术振兴机构;

关键词：

TIN OXIDE-FILMS; THIN-FILMS; CONDUCTIVITY; ELECTRODES;

D O I：

10.1063/1.4811355

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An investigation was carried out into the effect of uniaxial optical anisotropy in poly (3,4-ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS) on the photovoltaic performance of crystalline Si/PEDOT: PSS heterojunction solar cells fabricated by spin coating using either a methanol (MeOH) solvent alone or using MeOH and ethylene glycol (EG) as cosolvents. Spectroscopic ellipsometry revealed that the extraordinary index of refraction increased by the use of the cosolvents. In contrast, the ordinary index of refraction indicated metallic properties and was almost independent of the concentration of MeOH or EG. The highest conductivity was found for a (PEDOT: PSS):(MeOH):(EG) weight ratio of 1:1:0.1, and this sample exhibited a relatively high power conversion efficiency of 11.23%. These findings suggest that the increase in the extraordinary index of refraction leads to an enhancement of the hole mobility in PEDOT: PSS, resulting in improved photovoltaic performance. (C) 2013 AIP Publishing LLC.

引用

页数：4

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