光伏转换效率瓶颈是制约其在发电市场发展的根本原因。钙钛矿/晶体硅叠层电池理论效率可达35.6%，是有望实现光伏跨越式发展的重要技术，而当前最高效率仅为23.6%，填补这一缺口的关键就是顶底电池间的隧道结技术。本项目基于新兴而极具潜力的金属氧化物-晶体硅异质结电池与钙钛矿电池结合的思想，聚焦于其钙钛矿/晶体硅叠层电池隧道结载流子复合和输运的物理机制的研究，致力于确立隧道结物理模型、以及隧道结材料和结构对叠层电池性能调控的数据库。内容主要包括：（1）新型高稳定钙钛矿电池实现及界面工程；（2）光控Kelvin探针等技术原位揭示隧道结及界面载流子复合和输运物理机制；（3）OMO（氧化物-金属-氧化物）及（4）TMO-TCO-MO（过渡金属氧化物-透明导电膜-氧化物）隧道结设计、实现与调控。本课题的实施，将为获得高质量钙钛矿/硅叠层电池器件及工艺，进而为高效光伏技术创新发展和应用提供理论与技术支持。

The bottleneck of PV conversion efficiency is the root cause of the development of its power generation market. The theoretical conversion efficiency of the perovskite / crystalline silicon tandem solar cells is pointed to 35.6%, which is expected to be the destructive strategy for the revolution of photovoltaic market. However, the champion cell efficiency is only 23.6% in small aperture area. The powerful protocol to approaching the theoretical one is the tunneling junctions between the top and bottom cells because it was still ignored at the start up stage of the whole development of the perovskite/crystalline silicon tandem solar cells. Moreover, most of researchers are inclined to bet on the amorphous silicon thin film based silicon heterojunction solar cells currently with high efficiency values, missing a rising and promising transition-metal-oxides based crystalline silicon heterojunction solar cells with huge potential. Combining that with perovskite, this project focuses on the study of recombination and transport behavious at the tunneling junction of that tandem cells as well as building of their physical models and modulating the performance of the tandem cells via variation of tunnel junction materials and structures. This study includes: (1) Interface engineering for novel single junction perovskite solar cells with high conversion efficiency and stability; (2) Light control scanning Kelvin probe in-situ reveals the carriers recombination and transport mechanism at the tunnel junction and interfaces; Design, realization and regulation of OMO (oxide - metal - oxide) tunneling junction structures (3) and TMO-TCO-MO (transition metal oxide - transparent conductive oxide – metal oxide) ones (4). Basing on this work, we aim to achieve high-quality perovskite / crystalline silicon tandem solar cells and related processes, which is expected to promote high conversion-efficiency photovoltaic technology and market of our country in the future.