Citation: ZHU De-Hua, ZHONG Rong, CAO Yu, PENG Zhi-Hui, FENG Ai-Xin, XIANG Wei-Dong, ZHAO Jia-Long. Size-Dependent Electron Injection and Photoelectronic Properties of CuInS₂ Quantum Dot Sensitized Solar Cells[J]. Acta Physico-Chimica Sinica, ;2014, 30(10): 1861-1866. doi: 10.3866/PKU.WHXB201408044 shu

Size-Dependent Electron Injection and Photoelectronic Properties of CuInS₂ Quantum Dot Sensitized Solar Cells

1.
1. Key Laboratory of Laser Manufacturing Technology and Equipment, College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, P. R. China;
2. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang Province, P. R. China

Received Date: 30 April 2014
Available Online: 4 August 2014
Fund Project:

Size-dependent electron injection processes in CuInS₂ (CIS) quantum dot sensitized solar cells (QDSSCs) were studied. CuInS₂ quantum dots (QDs) with various diameters were synthesized and sensitized on TiO₂ films. The energy levels of the CuInS₂ QDs were measured by cyclic voltammetry. The rates and efficiencies of electron transfer from CuInS₂ QDs to TiO₂ films were determined by time-resolved photoluminescence spectroscopy. It was found that the rate of electron injection increased with a decrease in QD size while the efficiency of electron injection decreased. Furthermore, the power conversion efficiency, the short-circuit photocurrent, and the fill factor (FF) of the QDSSCs increased with an increase in QD size. The enhanced performance of the QDSSCs was attributed to the increase in electron injection efficiency. These results indicate that the performance of the QDSSCs could be optimized by varying the size of the QDs.
- Quantum dot sensitized solar cell,
- CuInS₂ quantum dot,
- Electron transfer,
- Photoluminescence lifetime,
- Time-resolved photoluminescence spectroscopy
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Size-Dependent Electron Injection and Photoelectronic Properties of CuInS2 Quantum Dot Sensitized Solar Cells

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通讯作者: 陈斌, bchen63@163.com

Size-Dependent Electron Injection and Photoelectronic Properties of CuInS₂ Quantum Dot Sensitized Solar Cells