题目：Coupled Thermodynamic and Stress-Strain Insights into Textured Perovskite/Silicon Tandem Solar Cells
作者：Yuqi Zhanga,b, Yining Baoa,b, Luolei Shia,b, Zihao Fua,b, Jun Yanga,b, Yu Lianga,b, Jiao Liua,b, Yaohui Zhana,b, Linling Qina,b, Tianshu Maa,b, Guoyang Caoa,b,c*, Changlei Wanga,b*, Xiaofeng Lia,b*, and Zhenhai Yanga,b*
单位：
aSchool of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
bKey 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
cEngineering Research Center of Digital Graphic and Next-Generation Printing, Jiangsu Province, Soochow University, Suzhou 215006, China
Abstract: Perovskite/crystalline silicon (c-Si) tandem solar cells (TSCs) offer exceptional potential for next-generation photovoltaics, yet their complex multilayer structures and thermal-stress mismatches pose significant challenges. Here, we develop a comprehensive coupled opto-electro-thermal-mechanical simulation model to thoroughly investigate the thermodynamic and stress-strain behavior in pyramid-textured perovskite/c-Si TSCs. Our results reveal that energy-dissipation-induced heat significantly reduces the open-circuit voltage and efficiency of the devices, which can be mitigated through effective cooling strategies and minimizing non-intrinsic heat generation. Additionally, we demonstrate that heat predominantly accumulates in the perovskite layer, inducing localized thermal stress, especially at pyramid valleys. We further identify that stress can be significantly alleviated by adopting rounded pyramid structures and incorporating grain-boundary infilling materials engineered for optimal thermal expansion and mechanical compatibility. This work delivers a comprehensive understanding of heat-stress-induced performance degradation in textured TSCs and proposes actionable strategies for heat-stress management, providing valuable insights for developing high-efficiency and stable perovskite/c-Si TSCs.
摘要：钙钛矿/晶硅叠层太阳电池在下一代光伏技术中具有极大的应用潜力，但其复杂的多层结构和热应力不匹配等问题带来了巨大的挑战。在此，我们开发了一个全面的光-电-热-力耦合模型，以深入研究金字塔纹理型钙钛矿/晶硅叠层太阳电池中的热力学效应和应力-应变行为。研究结果表明，能量耗散引起的热量显著降低了器件的开路电压和能量转换效率，这可以通过有效的冷却策略和抑制非本征热产生来缓解。此外，我们还证明产生的热量主要积聚在钙钛矿层中，从而产生局部热应力，尤其是在金字塔结构的谷底处。我们进一步发现，采用圆角化的金字塔结构并结合晶界填充材料可以显著减轻应力。这项研究全面阐释了具有纹理结构的叠层太阳电池中因热应力导致的性能下降情况，并提出了应对热应力的有效策略，为开发高效且稳定的钙钛矿/晶硅叠层太阳电池提供了有价值的见解。
影响因子：18.2