适用于钙钛矿@CIGS叠层太阳电池的全印刷高效稳定钙钛矿电池

钙钛矿太阳电池已实现了高转换效率，但与光伏行业对其更高的期待仍有差距。低成本制备高效率（>28%）叠层电池是快速实现钙钛矿太阳电池应用的可行途径。印刷制备技术对叠层太阳电池有很好的工艺适应性，但复杂的底电池表面结构使得相关基础研究工作需要进一步加强；此外，进一步提升钙钛矿太阳电池在使役条件下的稳定性仍然是非常现实的需求。因此，本项目以CIGS薄膜太阳电池为底电池，采用印刷工艺在CIGS表面制备钙钛矿顶电池，针对印刷制备钙钛矿电池过程中的薄膜生长机理、基板性质和表面结构特征对印刷过程中钙钛矿成膜质量的影响，以及薄膜物化性质和显微结构特征对其理化稳定性的影响等问题开展研究；尝试建立印刷工艺下，钙钛矿成膜过程中的多尺度孔道演化机理；探明钙钛矿自身物化性质以及器件钝化结构对电池稳定性的影响机制；在此基础上，优化叠层电池多界面载流子迁移效率，获得高转换效率的钙钛矿/CIGS叠层太阳电池。

Photovoltaic industry generated a not-realized expected power conversion efficiency(PCE) about perovskite solar cells(PSCs) although PCE of PSCs soared quickly. Fabricating high efficiency(>28%) tandem solar cells with low costs can satisfy the needs of PV industry. Printing PSCs are promising candidates for tandem solar cells, however, fundamental researches are highly demanded as printing PSCs layers deposition mechanisms directly on complicated surface morphologies is still unclear. On besides achieving high PCE, it is also important to improve PSCs stability under working conditions for future applications . In this project, we are therefore going to directly printing PSCs on CIGS solar cells. We will investigate influences of printing thin films forming mechanisms, substrates and their surface morphologies on performances of printed perovskite films. Effects of perovskite thin films’ physical and chemical properties and microstructures on both physical and chemical stability of perovskite films will be also studied. Evolving mechanisms of pores with varied sized while forming perovskite thin films under printing conditions will be clarified. Explore the basic properties of perovskite layers and various device passivation strategies influences on the stability. Based on these fundamental researches, we are aiming for high efficiency and stable perovskite /CIGS tandems cells after optimizing the electrons transporting efficiency at multiple-interfaces in tandem devices.