文献类型：期刊文献

英文题名：Cyanine dye acting both as donor and acceptor in heterojunction photovoltaic devices

作者：Meng, Fanshun[1,2]; Chen, Kongchang[1]; Tian, He[1]; Zuppiroli, Libero[2]; Nuesch, Frank[2]

机构：[1]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[2]Swiss Fed Inst Technol, Inst Mat, CH-1015 Lausanne, Switzerland

年份：2003

卷号：82

期号：21

起止页码：3788

外文期刊名：APPLIED PHYSICS LETTERS

收录：;EI(收录号：2003277529377);WOS:【SCI-EXPANDED(收录号:WOS:000182993700068)】；

语种：英文

外文关键词：Electron energy levels - Fullerenes - Heterojunctions - Organic compounds - Photovoltaic cells - Thin films

摘要：The use of cyanine dyes in thin-film heterojunction photovoltaic devices is investigated. It is demonstrated that a carbocyanine dye acts as donor in conjunction with buckminsterfullerene (C60). Due to its high electron affinity, the cyanine can also act as acceptor when using copoly(dicyano-phenylvinylene-triphenylamine) as donor. H and J aggregates of the cyanine dye play a determining role both in the photocurrent spectrum and in the open circuit voltage. Open-circuit voltages ranging from 0.25 to 1.28 V are obtained for devices using the cyanine as donor and acceptor, respectively. When the cyanine layer is sandwiched between the polymer donor and the C60 acceptor, incident photon to current conversion efficiencies greater than 10% are observed. The possibility of using cyanine dyes at the same time as donors and acceptors is a promising strategy to improve conversion efficiency. (C) 2003 American Institute of Physics.