材料科学
钙钛矿(结构)
钝化
能量转换效率
光伏系统
卤化物
光电子学
带隙
兴奋剂
热稳定性
铽
纳米技术
化学工程
无机化学
电气工程
图层(电子)
发光
化学
工程类
作者
Sawanta S. Mali,Jyoti V. Patil,Sachin R. Rondiya,Nelson Y. Dzade,Julian A. Steele,Mohammad Khaja Nazeeruddin,Pramod S. Patil,Chang Kook Hong
标识
DOI:10.1002/adma.202203204
摘要
Abstract Realizing photoactive and thermodynamically stable all‐inorganic perovskite solar cells (PSCs) remains a challenging task within halide perovskite photovoltaic (PV) research. Here, a dual strategy for realizing efficient inorganic mixed halide perovskite PV devices based on a terbium‐doped solar absorber, that is, CsPb 1− x Tb x I 2 Br, is reported, which undertakes a bulk and surface passivation treatment in the form of CsPb 1− x Tb x I 2 Br quantum dots, to maintain a photoactive γ‐phase under ambient conditions and with significantly improved operational stability. Devices fabricated from these air‐processed perovskite thin films exhibit an air‐stable power conversion efficiency (PCE) that reaches 17.51% (small‐area devices) with negligible hysteresis and maintains >90% of the initial efficiency when operating for 600 h under harsh environmental conditions, stemming from the combined effects of the dual‐protection strategy. This approach is further examined within large‐area PSC modules (19.8 cm 2 active area) to realize 10.94% PCE and >30 days ambient stability, as well as within low‐bandgap γ‐CsPb 0.95 Tb 0.05 I 2.5 Br 0.5 ( E g = 1.73 eV) materials, yielding 19.01% (18.43% certified) PCE.
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