二价阳离子掺杂优化铜锌锡硫(硒)薄膜太阳能电池性能的研究进展

Research progress on optimizing performance of Cu_(2)ZnSnS_(4)(Cu_(2)ZnSn(S,Se)_(4))thin-film solar cells by bivalent cations doping

阳离子掺杂措施被认为是调节优化铜锌锡硫硒薄膜(Cu_(2)ZnSn(S,Se)_(4),CZTS(Se))太阳能电池有效措施之一,其中,二价阳离子掺杂措施是研究最多、应用最广的。本文从阳离子取代和阳离子额外添加两个方面详细介绍了二价阳离子掺杂措施在优化CZTS(Se)薄膜太阳能电池性能方面的研究进展,二价阳离子取代措施,如Cd^(2+)取代Zn^(2+)等,主要是可以有效降低CZTS(Se)薄膜太阳能电池吸收层的缺陷密度,提高结晶质量,解决吸收层和缓冲层之间界面能带偏移值较大的问题,从而减少电池器件的开路电压亏损,提高器件效率;二价阳离子的额外添加,如Co、Mn的额外添加,主要是优化薄膜的结晶性、帮助载流子的输运,提高吸收层薄膜的电学性能;最后,也总结两类阳离子掺杂措施的优缺点及应用前景。

Cation doping measures are considered as one of the effective measures to optimize the performance of Cu_(2)ZnSn(S,Se)_(4)(CZTS(Se))thin film solar cells,and divalent cation doping measures are the most studied and widely applied in all cation doping measures.Here,the research progress of divalent cation measures in optimizing the performance of CZTS(Se)thin film solar cells is introduced from two aspects:Cations substitution and extra cations addition.Divalent cations substitution measures,such as,substitution of Zn^(2+)with Cd^(2+),mainly reduce the defect density of the absorber layer of CZTS(Se)thin film solar cells,improve the crystalline quality,and solve the problem of large interface energy band offset between the absorber layer and buffer layer,thus reducing the open voltage circuit loss of the device and improving its efficiency.The extra addition of divalent cations,such as,the extra addition of Co^(2+)/Mn^(2+),can optimize the crystallinity of the film,help the carrier transport,and improve the electrical properties of the absorber layer.Finally,their advantages,disadvantages,and the application prospects are also summarized.