物理化学学报Issue(7)：1331-1337,7.DOI:10.3866/PKU.WHXB201505072
耦联剂辅助吸附法制备CuInS2量子点敏化太阳电池
CuInS2 Quantum Dot-Sensitized Solar Cells Fabricated via a Linker-Assisted Adsorption Approach
摘要
Abstract
Col oidal chalcopyrite CuInS2 (CIS) quantum dots (QDs) were synthesized using copper(I) iodine (CuI) and indium(III) acetate (InAc3) as metal cationic precursors, and dodecanethiol (DDT) as the sulfur source and solvent. The microstructure and optical properties of the prepared CIS QDs were characterized by X-ray diffraction (XRD), Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM), and UV-Vis absorption spectroscopy. The results showed that the CIS consisted of chalcopyrite phase and exhibited Cu-Au ordering. With prolonged reaction time, the grain sizes of the QDs became larger and the absorption edges of the CIS QDs showed a red-shift owing to the size-induced quantum confinement effect. For the first time, DDT-capped CIS QDs with narrow size distribution were connected to the inner surface of mesoporous TiO2 films via a thioglycolic acid (TGA)-assisted adsorption approach, which was simple and easy to carry out. The adsorption behaviors of both TGA and the CIS QDs on the TiO2 films were detected by attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. The results indicated that TGA was adsorbed onto the surface of TiO2 via COOH groups while the―SH group was exposed outside, and replaced DDT at the surface of the CIS QDs, leading to the attachment between TiO2 and CIS. It was revealed that the CIS QDs of~3.6 nm in size exhibited the best light absorption capacity and photovoltaic performance. An over-coating of CdS significantly improved the performance of the QDSSCs owing to decreased electron recombination, and a power conversion efficiency of~2.83%was obtained.关键词
铜铟硫/量子点/敏化太阳电池/多功能耦联剂/巯基乙酸/辅助吸附Key words
CuInS2/Quantum dot/Sensitized solar cel/Bifunctional linker/Thioglycolic acid/Assisted adsorption分类
化学化工引用本文复制引用
王楠,梁柱荣,王欣,徐雪青,方军,王军霞,郭华芳..耦联剂辅助吸附法制备CuInS2量子点敏化太阳电池[J].物理化学学报,2015,(7):1331-1337,7.基金项目
The project was supported by the National Natural Science Foundation of China (21073193,21273241,21376195), Project on the Integration of Industry, Education and Research of Guangdong Province, China (2012B091100476), and Science and Technology Research Project of Guangzhou, China (2014J4100218).国家自然科学基金(21073193,21273241,21376195),广东省教育部产学研结合重大科技专项项目(2012B091100476)及广州市科技计划项目(2014J4100218)资助 （21073193,21273241,21376195）
