文献类型：会议论文

英文题名：Interface modification to optimize charge separation in cyanine heterojunction photovoltaic devices

作者：Nüesch, Frank[1,2,4]; Tornare, Gregory[2]; Zuppiroli, Libero[2]; Meng, Fanshun[3]; Chen, Kongchang[3]; Tian, He[3]

机构：[1]EMPA, Lab Funct Polymers, Swiss Fed Lab Mat Testing & Res, CH-8600 Dubendorf, Switzerland;[2]Ecole Polytech Fed Lausanne, Inst Mat, Lab Optoelect Mat Mol, CH-1015 Lausanne, Switzerland;[3]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

会议论文集：International Conference on Physics, Chemistry and Engineering of Solar Cells

会议日期：MAY 13-15, 2004

会议地点：Univ Extremadura, Sch Ind Engn, Badajoz, SPAIN

主办单位：Univ Extremadura, Sch Ind Engn

语种：英文

外文关键词：organic solar cells; cyanine dyes; PEDOT; ITO; interface

摘要：We investigate heterojunction photovoltaic devices using the carbocyanine 1,1'-diethyl-3,3,3',3'-tetramethylcarbocyanine perchlorate (Cy5) as donor and buckminsterfullerene (C-60) as acceptor. We find that photocurrent generation occurs at the interface between CY5 and indium tin oxide (ITO) as well as at the organic heterointerface. By analyzing the spectral dependence of the photocurrent as a function of applied voltage, we were able to demonstrate that poly(3,4-ethylenedioxythiophene) (PEDOT) inhibits electron injection from the cyanine into ITO. Since the photocurrent generation at the ITO electrode is opposite to the one generated at the organic heterojuncion, the use of PEDOT leads to increased short-circuit current and open-circuit voltage. (c) 2004 Elsevier B.V. All rights reserved.