Rational heterostructure stacking enables 23% wide-bandgap perovskite solar cells by side-reaction inhibition,Energy & Environmental Science

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Rational heterostructure stacking enables 23% wide-bandgap perovskite solar cells by side-reaction inhibition
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2024-07-11 , DOI: 10.1039/d4ee01547a
Tianyu Huang ₁ , Fan Xu _{1,

2} , Jiangbing Hu ₃ , Jiang Wu ₃ , Shunde Li ₁ , Peng Chen ₁ , Xiaohan Jia ₄ , Qiuyang Li ₁ , Haoming Yan ₁ , Yongqiang Ji ₁ , Deying Luo ₅ , Dengke Wang ₆ , Juntao Hu _{6,

7} , Hao-Hsin Chen ₁ , Zhangyuchang Lu ₁ , Hongyu Xu ₁ , Lei Li ₁ , Rui Sha ₃ , Qixuan Zhong ₁ , Xinyu Bai ₄ , M. Ibrahim Dar ₄ , Tinglu Song ₈ , Zikun Li ₂ , Xiaoyu Yang ₁ , Lichen Zhao ₁ , Zheng-Hong Lu _{5,

6} , Qihuang Gong _{1,

3,

9} , Rui Zhu _{1,

3,

9}

Affiliation

State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Frontiers Science Center for Nano-optoelectronics & Collaborative Innovation Center of Quantum Matter, Peking University, Beijing, 100871, China
Shenzhen BTR New Energy Technology Institute Co., Ltd., Shenzhen, 518118, China
Peking University Yangtze Delta Institute of Optoelectronics, Nantong, 226010, China
Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK
Department of Materials Science and Engineering, University of Toronto, Toronto, Ontario, M5S 2E8, Canada
Department of Physics, Center for Optoelectronics Engineering Research, Yunnan University, Kunming, 650091, China
Department of Physics, Mathematics and Computer Science, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, China
Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006, China

Wide-bandgap (WBG) perovskite solar cells (PSCs) attract intensive attention because of their high tandem compatibility and versatile application scenarios. However, severe interfacial non-radiative recombination of mixed-ion WBG perovskite films was caused by complex defect types and phase impurities, leading to deteriorated device performance and stability. Herein, a rational surface heterostructure design was achieved by precisely constructing a two-dimensional Dion–Jacobson layer atop the 3D WBG layer by inhibiting surface side reactions. A dual-ammonium strategy was screened out to block undesired molecular interactions, refining surface lattice structures and energy landscapes to interfacial defect reduction, charge transport acceleration, and phase stability prolongation. A champion WBG PSC (active area: 0.10 cm²) based on the optimized 1.68 eV perovskite film achieved an impressive efficiency of 23.05% (certified 22.58%) with an open-circuit voltage of 1.25 V, plus a large-area (1.00 cm²) efficiency exceeding 21.25% and a mini-module (7.26 cm²) efficiency of 20.10%.

中文翻译：

合理的异质结构堆叠可通过副反应抑制实现 23% 宽带隙钙钛矿太阳能电池

宽带隙（WBG）钙钛矿太阳能电池（PSC）因其高串联兼容性和多样化的应用场景而受到广泛关注。然而，复杂的缺陷类型和相杂质导致混合离子WBG钙钛矿薄膜发生严重的界面非辐射复合，导致器件性能和稳定性恶化。在此，通过抑制表面副反应，在 3D WBG 层顶部精确构建二维 Dion-Jacobson 层，实现了合理的表面异质结构设计。筛选出双铵策略来阻止不需要的分子相互作用，细化表面晶格结构和能量景观，以减少界面缺陷、加速电荷传输和延长相稳定性。基于优化的 1.68 eV 钙钛矿薄膜的冠军 WBG PSC（有效面积：0.10 cm ² ）实现了令人印象深刻的 23.05% 效率（认证为 22.58%），开路电压为 1.25 V，加上大面积（1.00 cm ² ）效率超过21.25%，迷你组件（7.26 cm ² ）效率为20.10%。

更新日期：2024-07-11

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