文献类型：期刊文献

英文题名：Novel iridium complex with carboxyl pyridyl ligand for dye-sensitized solar cells: High fluorescence intensity, high electron injection efficiency?

作者：Ning, Zhijun[1,2];Zhang, Qiong[1,2,3];Wu, Wenjun[1,2];Tian, He[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Royal Inst Technol, Sch Biotechnol, S-10691 Stockholm, Sweden

年份：2009

卷号：694

期号：17

起止页码：2705

外文期刊名：JOURNAL OF ORGANOMETALLIC CHEMISTRY

收录：;EI(收录号：20092912195140);WOS:【SCI-EXPANDED(收录号:WOS:000267931300009)】；

基金：This work was supported by National Science Foundation of China (50673025), National Basic Research 973 Program (2006CB806200) and Scientific Committee of Shanghai.

语种：英文

外文关键词：Dye sensitized solar cells; Photovoltaic material; Iridium complex; Luminescence

摘要：Novel iridium-based sensitizers Iridium(III) bis[2-phenylpyridinato-N,C-2']-5-carboxylpicolinate) (Ir1), Iridium(III) bis[2-(naphthalen-1-yl) pyridinato-N,C-2']-5-carboxyl-picolinate) (Ir2), Iridium(III) bis[2-phenylpyridinato-N, C-2']-4,4'-(dicarboxylicacid)-2,2'-bipyridine (Ir3) were synthesized for sensitization of mesoscopic titanium dioxide injection solar cells. By changing the ligand, the absorption spectra can be extended and molar extinction coefficient was enhanced. The dye-sensitized nanocrystalline TiO2 solar cells (DSSCs) based on dye Ir3 showed the best photovoltaic performance: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 85%, a short-circuit photocurrent density (J(sc)) of 9.59 mA cm (2), an open-circuit photovoltage (V-oc) of 0.552 V, and a fill factor (ff) of 0.54, corresponding to an overall conversion efficiency of 2.86% under AM 1.5 sun light. Moreover, the HOMO and LUMO energy levels tuning can be conveniently accomplished by alternating the ligand. The high oxidative potential of Ir3 enables it to be used along with Br-/Br-3(-) redox electrolyte and the photovoltage was found to be enhanced greatly. (C) 2009 Elsevier B. V. All rights reserved.