The efficiency and stability issues of perovskite light-emitting diodes, especially at high brightness, need to be urgently solved for displays and lighting applications. Herein we present a simple chemical washing method called solvent sieve to resolve the phase dimension issue of metal halide perovskites. After being sieved, undesirable defect-rich low-n phases are selectively screened out of perovskite multi-quantum-well structures. With better intrinsic structure refinement, the sieved perovskites demonstrated not only a record external quantum efficiency, current efficiency, and T₅₀ lifetime of 29.5%, 127.4 cd A⁻¹, and 18.67 h at 12,000 cd m⁻² (the equivalent of over 50,317 h or 5.7 years at 100 cd m⁻²), respectively, with a maximum luminance of over 147,872.8 cd m⁻², but also extraordinary resistance to air and moisture, maintaining over 75% of film photoluminescence quantum yield and 80% of device EQE after being stored at ambience for 100 days. The simple solvent sieve treatment we reported here confirms the feasibility of metal halide perovskites for luminescence and unleashes the efficiency and stability potentials of high-brightness perovskite light-emitting diodes for future commercial applications.

钙钛矿发光二极管的效率和稳定性问题，特别是高亮度下的效率和稳定性问题，在显示和照明应用中亟待解决。在此，我们提出了一种称为溶剂筛的简单化学清洗方法来解决金属卤化物钙钛矿的相尺寸问题。筛选后，不需要的富含缺陷的低n相被选择性地从钙钛矿多量子阱结构中筛选出来。通过更好的内在结构细化，筛分的钙钛矿不仅表现出创纪录的外部量子效率、电流效率和29.5%的T _{50寿命、127.4 cd A} ^-1和12,000 cd m ^{- 2}下的18.67 h （相当于超过50,317 h 或 5.7 年 (100 cd m ^{− 2} )，最大亮度超过 147,872.8 cd m ^{− 2}，而且具有出色的耐空气和防潮性能，保持超过 75% 的薄膜光致发光量子产率和 80% 的器件 EQE常温保存100天后。我们在此报道的简单溶剂筛处理证实了金属卤化物钙钛矿发光的可行性，并释放了高亮度钙钛矿发光二极管在未来商业应用中的效率和稳定性潜力。