三种CuS对电极的制备及其对量子点敏化太阳能电池光电性能的影响
收稿日期: 2016-03-16
修回日期: 2016-05-10
网络出版日期: 2016-05-18
基金资助
国家自然科学基金（Nos.21503177），中央高校基本科研业务费（NO.20720150031）、高等学校学科创新引智计划（“111 计划”，B16029）资助
Fabrications of three copper sulfide counter electrodes and their influences on photovoltaic properties in QDSSCs
Received date: 2016-03-16
Revised date: 2016-05-10
Online published: 2016-05-18
洪晓丹 , 许子颉 , 张发荫 , 李宇鹏 , 叶美丹 , 林昌健 , 郭文熹 . 三种CuS对电极的制备及其对量子点敏化太阳能电池光电性能的影响[J]. 电化学, 2016 , 22(4) : 404 -411 . DOI: 10.13208/j.electrochem.160146
Quantum dot-sensitized solar cells (QDSSCs) have attracted intensive attention in scientific and industrial fields due to their high molar extinction coefficient, spectral tunability by particle size, ease of fabrication, and low cost. In the past years, semiconductor metal sulfides have attracted extensive attention because of their attractive physical and chemical properties for potential applications in many fields，such as PbS, CuS, CoS and CdS. In particular, copper sulfides have become a promising candidate for counter electrode materials in QDSSCs for their outstanding electrochemical and catalytic properties. In order to explore more stable and efficient copper sulfide counter electrode materials, in this work, we used three different methods to synthesize copper sulfide nanosheet arrays (marked as CuS-1, CuS-2, CuS-3), which were then characterized by XRD, SEM and electrochemical workstation. XRD patterns showed that all the three samples were copper sulfide (Cu:S = 1:1). And SEM images revealed that the fabrication methods of CuS significantly affected their morphologies. . The obtained CuS-1, CuS-2 and CuS-3 nanosheet arrays exhibited enhanced PCEs up to 2.92%，2.58% and 3.27%, respectively, when used as CEs in QDSSCs, implying increases of 87%，65% and 109% as compared to Pt-based QDSSCs, respectively. Through all the characterizations, we found that the CuS-3 showed the best catalytic activity in the reduction of polysulfide electrolyte among the three samples.
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