高效钙钛矿/晶硅叠层太阳电池

刘  江

苏州大学能源学院

E-mail: liujiang@suda.edu.cn

报告摘要

为进一步提升光伏器件的光电转换效率，叠层技术已成为光伏领域的重要研究方向。面向硅基叠层的宽带隙钙钛矿薄膜仍存在相分离、界面复合等关键科学问题，与晶硅底电池的集成还面临绒面兼容、结构互连、能级匹配等多重挑战。厘清叠层电池各界面处的电子结构及界面修饰的作用机制，是当前领域亟待攻克的核心问题。本报告将介绍宽带隙钙钛矿场效应—化学协同钝化的结构与作用机制，以及高效叠层器件的构建与光电性能表征等研究进展。面向未来空天极端工况的应用需求，我们开展了超薄晶硅钙钛矿叠层电池关键技术研究，采用缺陷钝化与界面缓冲改性等手段，缓解异质层热膨胀失配引发的界面破坏，抑制非辐射复合与离子迁移，实现器件光电转换效率与极端环境耐受能力的同步提升。

关键词：太阳电池；晶硅；钙钛矿；叠层

High-efficiency perovskite/silicon tandem solar cells

Liu, Jiang

College of Energy, Soochow University

E-mail: liujiang@suda.edu.cn

Abstract

To further enhance the power conversion efficiency of photovoltaic devices, tandem technology has become a major research direction in photovoltaics. Wide-bandgap perovskite films for silicon-based tandems still face key scientific challenges such as phase segregation and interfacial recombination, and their integration with crystalline silicon bottom cells encounters multiple obstacles in texture compatibility, structural interconnection, and energy-level alignment. Clarifying the electronic structures at the various interfaces of tandem cells and the underlying mechanism of interfacial modification is therefore a critical issue to be addressed. This presentation will introduce the structure and mechanism of field-effect–chemical synergistic passivation in wide-bandgap perovskites, as well as research progress on the construction and optoelectronic characterization of highly efficient tandem devices. To meet the application demands of extreme working conditions in future aerospace applications, we have carried out key technological research on perovskite/ultra-thin crystalline silicon tandem solar cells. Through defect passivation and interfacial buffer modification, we alleviate interface damage induced by the thermal expansion mismatch between heterogeneous layers and suppress non-radiative recombination and ion migration, thereby achieving simultaneous improvements in power conversion efficiency and tolerance to extreme environments.

Keywords: Solar cell; Crystalline silicon; Perovskite; Tandem

个人简介：刘江，苏州大学特聘教授，博士生导师，入选国家高层次领军人才、国家级青年人才、江苏省双创团队领军人才、江苏省杰青等人才计划。从事先进光伏材料与器件研究已18年，在光伏新材料开发、高效率器件构建与柔性集成、器件光电模拟等研究方面已具有丰富的经验与成果积累。相关工作曾首次突破了单结光伏器件肖克利-奎塞尔（S-Q）理论极限，多次刷新了钙钛矿/晶硅叠层电池的转换效率纪录，首次构筑了30%效率的全硅片尺寸的柔性晶硅/钙钛矿叠层器件。相关成果入选了2025年度“中国科学十大进展”（进展十）。作为项目负责人主持国家重点研发计划课题，国家自然科学基金青年基金、面上项目、省重点研发计划等10余项科研项目。已在Science（1篇通讯）、Nature（四篇通讯）、Nat. Mater.、Nat. Photonics、Joule等期刊发表SCI论文80余篇，多次担任Science、Nat. Energy、Nat. Mater.、Nat. Photonics等期刊的审稿人。