Effect of Na doping on the performance and the band alignment of CZTS/CdS thin film solar cell
Effect of Na doping on the performance and the band alignment of CZTS/CdS thin film solar cell
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Na掺杂对CZTS/CdS薄膜太阳能电池性能和能带排列的影响
DOI：
10.1016/j.solener.2020.02.088
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发表时间：
2020-05
期刊：
影响因子：
6.7
通讯作者：
Aierken Abuduwayiti
中科院分区：
文献类型：
--
作者：
Liu Bin;Guo Jie;Hao Ruiting;Wang Lu;Gu Kang;Sun Shuaihui;Aierken Abuduwayiti
碱金属掺杂可以抑制铜锌锡合金Cu_2ZnSnS_4（CZTS）中有害的反位缺陷，提高开路电压。在这项研究中，轻Na掺杂的CZTS/CdS薄膜太阳能电池的性能和能带排列的影响进行了研究。采用旋涂法在CZTS表面制备了Na掺杂量为10%的CZTS：Na薄膜。Na掺杂导致半高宽变窄，晶粒尺寸变大。由于NaZn浅受主缺陷的存在，提高了空穴浓度和电导率。此外，Na掺杂可以通过Na钝化效应和抑制SnZn缺陷，改善吸收层/缓冲层界面的能带排列，抑制SRH复合。CZTS：Na/CdS异质结中典型的悬崖状导带偏移（CBO）从0.25 eV减小到0.1 eV。CZTS：Na器件的Voc比CZTS/CdS器件高653 mV。最大转换效率达到7.46%，比掺杂前提高了44%。这些结果阐明了Na掺杂对CZTS太阳能电池异质结能带结构的影响，并支持了一个新的方面，即表面掺杂CZTS：Na吸收剂的合成具有很大的潜力，为未来的研究。
Alkali doping can suppress deleterious antisite defects in kesterite Cu2ZnSnS4(CZTS) and improve the open-circuit voltage. In this study, the effects of light Na-doping on the performance and the band alignment of CZTS/CdS thin-film solar cells were investigated. CZTS:Na thin films were fabricated by the spin coating with 10% Na doping on the surface of CZTS. The Na-doping led to the narrower FWHM and larger grain size. The hole concentration and the conductivity were improved due to the NaZnshallow acceptor defects. In addition, Na-doping can improve the band alignment of absorber/buffer interface and inhibit SRH recombination by the Na passivation effect and the suppression of SnZndefects. The typical cliff-like conduction band offset (CBO) was reduced from 0.25 eV in CZTS:Na/CdS to 0.1 eV in CZTS/CdS heterojunction. CZTS:Na device exhibited a higher Voc of 653 mV than that of CZTS/CdS device. The maximum conversion efficiency reached 7.46%, increased by 44% after Na-doping. These results clarify the effect of Na-doping on the band structure of the heterojunction in CZTS solar cells and support a new aspect that synthesis of a surface-doping CZTS:Na absorber has great potential for future research.
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影响因子：
6.9
作者：
Zhihua Zhou;Yanyan Wang;Dong Xu;Yafei Zhang
通讯作者：
Zhihua Zhou;Yanyan Wang;Dong Xu;Yafei Zhang
影响因子：
27.8
作者：
Gershon, Talia;Shin, Byungha;Guha, Supratik
通讯作者：
Guha, Supratik
DOI：
10.1016/j.egypro.2013.05.058
发表时间：
2013
期刊：
Energy Procedia
影响因子：
--
作者：
Sanjay Kumar Swami;Anuj Kumar;V. Dutta
通讯作者：
Sanjay Kumar Swami;Anuj Kumar;V. Dutta
影响因子：
4.6
作者：
He, Jianqiao;Guo, Yangwu;Huang, Fuqiang
通讯作者：
Huang, Fuqiang
影响因子：
3.2
作者：
D. Rudmann;D. Bremaud;H. Zogg;A. Tiwari
通讯作者：
D. Rudmann;D. Bremaud;H. Zogg;A. Tiwari