【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.更多还原

【Abstract】 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.更多还原