题目：Tracing the Energy Losses in All-Perovskite Tandem Solar Cells from Opto-Electro-Thermal Perspectives
作者：Yuqi Zhang1,2, Yining Bao1,2, Yue Zhao1,2, Tianshu Ma1,2, Luolei Shi1,2, Chenhui Zhang1,2, Zhenhai Ai1,2, Yaohui Zhan1,2, Linling Qin1,2, Changlei Wang1,2, Guoyang Cao1,2,3,*, Xiaofeng Li1,2,*, and Zhenhai Yang1,2,*
单位：
1 School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
2 Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China
3 Engineering Research Center of Digital Graphic and Next-Generation Printing, Jiangsu Province, Soochow University, Suzhou 215006, China
Abstract: Tandem solar cells (TSCs) can break the thermodynamic limits of single-junction SCs, yet their actual performance remains far below expectations. Uncovering the pathways and intrinsic physics behind these energy losses is critical to figuring out effective manipulation strategies for further improving device performance. Here, a tightly coupled opto-electro-thermal study on all-perovskite TSCs is reported which allows for readily tracing the detailed processes of the solar energy conversion from photon absorption to charge-carrier dynamics and heat generation/dissipation. These findings reveal that while TSCs significantly reduce thermalization heat, they simultaneously increase Joule, Peltier, and recombination heats, leading to greater heat generation and elevated operating temperatures. By identifying the primary heat generation sources and mechanisms, heat dissipation is further explored in TSCs through spatial heat distribution and temperature gradient analysis. The results indicate that the wide-bandgap and narrow-bandgap perovskite layers, along with the wide-bandgap perovskite-related interfaces, act as primary heat sources, highlighting the need to improve perovskite thermal conductivity. Moreover, heat management strategies are validated through conventional structural and material optimizations. From the optical, electrical, and thermal perspectives, a targeted roadmap is outlined to improve the efficiency of all-perovskite TSCs to ≈35%, offering valuable insights for the advancement of high-performance TSCs.
摘要：串联太阳能电池（TSCs）可以突破单结太阳能电池的热力学限制，然而目前其实际性能仍远低于理论极限。揭示这些能量损失背后的途径和内在物理对于找出有效的操作策略以进一步提高器件性能至关重要。本文报道了全钙钛矿TSCs的强耦合光电热研究，以便追踪太阳能从光子吸收到载流子动力学和热产生/耗散的详细过程。研究表明，在显著降低热化热的同时，TSC中的焦耳热、珀耳帖热和复合热增加，导致更大的热量产生和更高的工作温度。在确定主要热源和产热机制的基础上，通过空间热分布和温度梯度分析进一步探讨了TSC的散热问题。结果表明，宽带隙和窄带隙钙钛矿层以及宽带隙钙钛矿相关界面是主要热源，强调了提高钙钛矿导热性的必要性。此外，热管理策略通过传统的结构和材料优化得到验证。从光学、电学和热的角度，概述了将全钙钛矿TSCs的效率提高到35%的目标路径，为高性能TSCs的发展提供了有价值的见解。
影响因子：18.5
链接：//doi.org/10.1002/adfm.202503408