中国物理B ›› 2018, Vol. 27 ›› Issue (1): 16402-016402.doi: 10.1088/1674-1056/27/1/016402

所属专题： SPECIAL TOPIC — New generation solar cells

• SPECIAL TOPIC—Non-equilibrium phenomena in soft matters • 上一篇    下一篇

Regulation of Zn/Sn ratio in kesterite absorbers to boost 10% efficiency of Cu2ZnSn(S, Se)4 solar cells

Xue Min(闵雪), Jiangjian Shi(石将建), Linbao Guo(郭林宝), Qing Yu(于晴), Pengpeng Zhang(张朋朋), Qingwen Tian(田庆文), Dongmei Li(李冬梅), Yanhong Luo(罗艳红), Huijue Wu(吴会觉), Qingbo Meng(孟庆波), Sixin Wu(武四新)   

  1. 1 Key Laboratory for Renewable Energy(CAS), Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 The Key Laboratory for Special Functional Materials of MOE, Henan University, Kaifeng 475004, China
  • 收稿日期:2017-10-17 修回日期:2017-11-13 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Qingbo Meng, Sixin Wu E-mail:qbmeng@iphy.ac.cn;wusixin@henu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51627803, 51402348, 51421002, 51372270, and 51372272) and the Knowledge Innovation Program of the Chinese Academy of Sciences.

Regulation of Zn/Sn ratio in kesterite absorbers to boost 10% efficiency of Cu2ZnSn(S, Se)4 solar cells

Xue Min(闵雪)1,2, Jiangjian Shi(石将建)1,2, Linbao Guo(郭林宝)1,2, Qing Yu(于晴)1,2, Pengpeng Zhang(张朋朋)1,2, Qingwen Tian(田庆文)3, Dongmei Li(李冬梅)1,2, Yanhong Luo(罗艳红)1,2, Huijue Wu(吴会觉)1,2, Qingbo Meng(孟庆波)1,2, Sixin Wu(武四新)3   

  1. 1 Key Laboratory for Renewable Energy(CAS), Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 The Key Laboratory for Special Functional Materials of MOE, Henan University, Kaifeng 475004, China
  • Received:2017-10-17 Revised:2017-11-13 Online:2018-01-05 Published:2018-01-05
  • Contact: Qingbo Meng, Sixin Wu E-mail:qbmeng@iphy.ac.cn;wusixin@henu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51627803, 51402348, 51421002, 51372270, and 51372272) and the Knowledge Innovation Program of the Chinese Academy of Sciences.

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摘要： The Zn/Sn ratio in Cu2ZnSn(S, Se)4 (CZTSSe) films has been regulated to control the composition-related phase, defect, and photoelectric properties for high performance kesterite solar cells. It is found that the increase in the Zn/Sn ratio can slightly narrow the energy band gap to extend the light absorption range and improve the photocurrent. Optimal Zn/Sn ratio of 1.39 in CZTSSe film is obtained with the least secondary phase, the lowest defect density, and the longest charge recombination lifetime. Up to 10.1% photoelectric conversion efficiency has been achieved by this composition regulation.

关键词: CZTSSe solar cell, composition regulation, defect suppression

Abstract: The Zn/Sn ratio in Cu2ZnSn(S, Se)4 (CZTSSe) films has been regulated to control the composition-related phase, defect, and photoelectric properties for high performance kesterite solar cells. It is found that the increase in the Zn/Sn ratio can slightly narrow the energy band gap to extend the light absorption range and improve the photocurrent. Optimal Zn/Sn ratio of 1.39 in CZTSSe film is obtained with the least secondary phase, the lowest defect density, and the longest charge recombination lifetime. Up to 10.1% photoelectric conversion efficiency has been achieved by this composition regulation.

Key words: CZTSSe solar cell, composition regulation, defect suppression

中图分类号:  (Phase separation and segregation in thin films)

  • 64.75.St
72.20.Jv (Charge carriers: generation, recombination, lifetime, and trapping) 78.20.-e (Optical properties of bulk materials and thin films)