卤化物
碘化物
钙钛矿(结构)
锡
化学
卤素
SN2反应
纳米技术
降级(电信)
无机化学
材料科学
有机化学
结晶学
计算机科学
冶金
电信
烷基
作者
Luis Lanzetta,Thomas Webb,José Manuel Marín-Beloqui,Thomas J. Macdonald,Saif A. Haque
标识
DOI:10.1002/anie.202213966
摘要
Tin halide perovskites (Sn HaPs) are the top lead-free choice for perovskite optoelectronics, but the oxidation of perovskite Sn2+ to Sn4+ remains a key challenge. However, the role of inconspicuous chemical processes remains underexplored. Specifically, the halide component in Sn HaPs (typically iodide) has been shown to play a key role in dictating device performance and stability due to its high reactivity. Here we describe the impact of native halide chemistry on Sn HaPs. Specifically, molecular halogen formation in Sn HaPs and its influence on degradation is reviewed, emphasising the benefits of iodide substitution for improving stability. Next, the ecological impact of halide products of Sn HaP degradation and its mitigation are considered. The development of visible Sn HaP emitters via halide tuning is also summarised. Lastly, halide defect management and interfacial engineering for Sn HaP devices are discussed. These insights will inspire efficient and robust Sn HaP optoelectronics.
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