Lead halide–templated crystallization of methylamine-free perovskite for efficient photovoltaic modules

doi:10.1126/science.abh1035

GSTDTAP > 气候变化

DOI	10.1126/science.abh1035
	Lead halide–templated crystallization of methylamine-free perovskite for efficient photovoltaic modules
	Tongle Bu; Jing Li; Hengyi Li; Congcong Tian; Jie Su; Guoqing Tong; Luis K. Ono; Chao Wang; Zhipeng Lin; Nianyao Chai; Xiao-Li Zhang; Jingjing Chang; Jianfeng Lu; Jie Zhong; Wenchao Huang; Yabing Qi; Yi-Bing Cheng; Fuzhi Huang
	2021-06-18
发表期刊	Science
出版年	2021
英文摘要	Although formamidinium-based lead iodide (PbI2) perovskites have a favorable bandgap and good thermal stability, the difficulty in controlling nucleation makes it difficult to grow high-quality, large-area films compared with methylammonium counterparts. Bu et al. show that adding N -methyl-2-pyrrolidone to the perovskite precursors forms an adduct with PbI2 that promotes the formation of the desired black α-phase at room temperature. The addition of potassium hexafluorophosphate eliminated hysteresis by passivating interfacial defects and promoted long-term thermal stability at 85°C in unencapsulated devices. Large-area modules (17 square centimeters) achieved power conversion efficiencies of 20.4%. Science , abh1035, this issue p. [1327][1] Upscaling efficient and stable perovskite layers is one of the most challenging issues in the commercialization of perovskite solar cells. Here, a lead halide–templated crystallization strategy is developed for printing formamidinium (FA)–cesium (Cs) lead triiodide perovskite films. High-quality large-area films are achieved through controlled nucleation and growth of a lead halide• N -methyl-2-pyrrolidone adduct that can react in situ with embedded FAI/CsI to directly form α-phase perovskite, sidestepping the phase transformation from δ-phase. A nonencapsulated device with 23% efficiency and excellent long-term thermal stability (at 85°C) in ambient air (~80% efficiency retention after 500 hours) is achieved with further addition of potassium hexafluorophosphate. The slot die–printed minimodules achieve champion efficiencies of 20.42% (certified efficiency 19.3%) and 19.54% with an active area of 17.1 and 65.0 square centimeters, respectively. [1]: /lookup/doi/10.1126/science.abh1035
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/330811
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Tongle Bu,Jing Li,Hengyi Li,等. Lead halide–templated crystallization of methylamine-free perovskite for efficient photovoltaic modules[J]. Science,2021.
APA	Tongle Bu.,Jing Li.,Hengyi Li.,Congcong Tian.,Jie Su.,...&Fuzhi Huang.(2021).Lead halide–templated crystallization of methylamine-free perovskite for efficient photovoltaic modules.Science.
MLA	Tongle Bu,et al."Lead halide–templated crystallization of methylamine-free perovskite for efficient photovoltaic modules".Science (2021).