基于水添加剂策略调控前驱体溶液化学制备效率超过12%的CZTSSe太阳电池  

Precursor solution chemistry via water additive enabling CZTSSe solar cells with over 12% efficiency

作　　者：赵祥云 潘逸宁 刘丝靓 蒋良兴 赖延清 刘芳洋 Xiangyun Zhao;Yining Pan;Siliang Lu;Liangxing Jiang;Yanqing Lai;Fangyang Liu(School of Metallurgy and Environment,Hunan Province Key Laboratory of Nonferrous Value-Added Metallurgy,Central South University,Changsha 410083,China;Engineering Research Centre of Advanced Battery Materials,the Ministry of Education,Changsha 410083,China)

机构地区：[1]School of Metallurgy and Environment,Hunan Province Key Laboratory of Nonferrous Value-Added Metallurgy,Central South University,Changsha 410083,China [2]Engineering Research Centre of Advanced Battery Materials,the Ministry of Education,Changsha 410083,China

出　　处：《Science China Materials》2023年第3期895-902,共8页中国科学（材料科学（英文版）

基　　金：supported by the National Key Research and Development Program of China(2018YFE0203400).

摘　　要：高质量的吸收层对制备高效率Cu2ZnSn(S,Se)4(CZTSSe)薄膜太阳电池来说至关重要.与薄膜成核和晶体生长过程相关的前驱体溶液化学值得深入研究,从而有助于提出创造性的原理和策略来提高吸收层的质量和载流子传输特性,进而提升器件性能.然而,前驱体溶液化学的相关研究在CZTSSe太阳电池领域仍处于起步阶段.本工作报道了一种简便的环保添加剂策略来调控基于乙二醇甲醚体系的前驱体溶液化学.加入水添加剂可通过调整前驱体溶液内的溶胶粒径和配位行为来改善前驱体溶液的均一性和热重特性.成功对前驱体溶液化学进行调控后,得到了高质量的CZTSSe吸收层.在此基础上,得益于载流子动力学的增强,最终获得了认证效率达到12.07%的CZTSSe器件.本研究为通过环保添加剂调控前驱体溶液化学从而制备高效率锌黄锡矿CZTSSe薄膜太阳电池开辟了道路.High-quality absorber films are imperative for highly efficient Cu2ZnSn(S,Se)4(CZTSSe) thin-film solar cells.Precursor solution chemistry, interconnected with thin-film nucleation and the crystal growth process, should be studied insightfully. Thus, creative rationales and strategies could be proposed to improve the absorber quality, carrier characteristics, and hence device performance. However, the research on precursor solution chemistry in CZTSSe solar cells is still in its infancy. In this study, a facile eco-friendly additive strategy is reported to tailor the 2-methoxyethanol-based CZTS precursor solution chemistry. Incorporating water additives improves the homogeneity and thermogravimetric characteristics of a precursor solution by adjusting the particle sizes and coordination behavior inside the precursor solution. After the tailoring of the precursor solution chemistry, CZTSSe absorbers with high quality are fabricated. Hence, benefiting from the carrier dynamics enhancement, a CZTSSe device with a certified power conversion efficiency of 12.07% is achieved.The results open an avenue in precursor solution chemistry regulation through the use of eco-friendly additives to design highly efficient kesterite CZTSSe solar cells.

关 键 词：薄膜太阳电池 吸收层 晶体生长过程 载流子动力学 载流子传输 乙二醇甲醚 均一性 锌黄锡矿 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]