文献类型：期刊文献

英文题名：Influence of nanocrystal size on the quantum dots sensitized solar cells' performance with low temperature synthesized CdSe quantum dots

作者：Gao, Bing[1];Shen, Chao[1];Yuan, Shuanglong[1];Zhang, Bo[2];Zhang, Mengya[1];Yang, Yunxia[1];Chen, Guorong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2014

卷号：612

起止页码：323

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20142717886779);WOS:【SCI-EXPANDED(收录号:WOS:000339692300051)】；

基金：This study was supported by Shanghai Leading Academic Discipline Project (No. B502), Shanghai Key Laboratory Project (08DZ2230500), Doctoral Fund of Ministry of Education of China (20120074110018) and the National Natural Science Foundation of China (NSFC 51072052).

语种：英文

外文关键词：CdSe quantum dots (QDs); Quantum dots-sensitized solar cells (QDSCs); Green synthesized; Self-assembly; Quantum size effect; Power conversion efficiency (PCE)

摘要：The CdSe quantum dots (QDs) were synthesized with ethanol and glycerol under 50-160 degrees C in the present work. The reaction temperature is lower than the traditional solvent thermal method to fabricate the CdSe QDs around 250-350 degrees C. What's more, the avoiding of the use of phosphine contained solvent make the whole reaction environmental friendly. Then 3-Mercaptopropionic (MPA) was used to exchange the CdSe QDs' ligand of olic acid. After that, the MPA-capped CdSe QDs were tethered onto the TiO2's substrate, which guarantee the high coverage of the CdSe QDs on the TiO2 photoanode and the absorption range of 450-560 nm of light harvest. Furthermore, through the results of the CdSe QD's size for the cells' performance, we compared the significance of the QDs' absorption range, the electron injection from the conduction band of CdSe QDs' to TiO2's and polysulfide to the valance band of the CdSe QDs in the cells' performance and discuss the mechanism to improve the efficiency of the QDSCs. Finally, the QDSCs with polysulfide solution and Cu2S as counter electrode show excellent cell performance with open-circuit voltage (V-oc) of 0.6 V, short-circuit current density (J(sc)) of 10.58 mA/cm(2), fill factor (FF) of 0.564, and PCE of 3.7%. (C) 2014 Published by Elsevier B.V.