Enhanced cyanine solar cell performance upon oxygen doping

被引：40

作者：

Fan, Bin ^{[1
]}

Hany, Roland ^{[1
]}

Moser, Jacques-Edouard ^{[2
]}

Nueesch, Frank ^{[1
]}

机构：

[1] Empa, Swiss Fed Labs Mat Testing & Res, Lab Funct Polymer, CH-8600 Dubendorf, Switzerland

[2] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Photochem Dynam Grp, CH-1015 Lausanne, Switzerland

来源：

ORGANIC ELECTRONICS | 2008年 / 9卷 / 01期

关键词：

organic optoelectronic devices; photovoltaic cells; solar cells; cyanine dyes; fullerenc; C-60; doping; oxygen; annealing; charge transport; superoxide anion; conductivity;

D O I：

10.1016/j.orgel.2007.09.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of exposing cyanine-fullerene C-60 bilayer solar cells to ambient atmosphere is investigated. For exposure times of a few hours and concomitant light soaking, the device performance experiences a drastic power efficiency increase going from 0.14% to 1.2% measured at 30 mW/cm(2) simulated solar irradiation. The 10-fold enhancement is attributed to the photoinduced doping involving oxygen and water leading to the formation of reactive superoxide anions and mobile holes in the cyanine layer. The influence of water and dry oxygen are investigated separately. While water deteriorates the device performance, dry oxygen leads only to a partial increase of efficiency. Annealing does not ameliorate the performance of doped devices. Although then the cyanine layer features more crystallinity, the considerable morphological changes cause diffusional loss in charge carrier collection. Doping of not annealed devices brings a sizeable efficiency enhancement that highlights the importance of charge carrier transport in cyanine dye based solar cells. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：85 / 94

页数：10

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