Formamidinium lead halide CH(NH₃)₂PbX₃ (FAPbX₃) perovskite materials have achieved significant progress in efficient and stable single-junction/tandem perovskite solar cells, which is due to the promising thermal and air stability features. However, successful application of these materials in perovskite light-emitting diodes (PeLEDs) is scarce. Herein, regulating the FABr:PbBr₂ precursor concentration procedure is utilized to prepare very efficient PeLEDs based on CH(NH₃)₂PbBr₃ (FAPbBr₃). The resultant FAPbBr₃ film prepared at optimized 10 wt% condition shows the satisfied exciton radiative rate and low nonradiative rate, and a high photoluminescent quantum yield. In combination with novel ethyl acetate (EA) anti-solvent spin-washing method, the resultant FAPbBr₃ film shows compact, uniform and high coverage morphology characteristics. The PeLEDs show a maximum current efficiency of 13.4 cd A⁻¹, an external quantum efficiency of 3.5%, a maximum luminance close to 10000 cd m⁻², and an extremely high power efficiency of 19.1 lm W⁻¹, respectively. This performance is the best among all reported on FAPbBr₃ type PeLEDs.

甲ami鎓卤化铅CH（NH ₃）₂ PbX ₃（FAPbX ₃）钙钛矿材料在有效和稳定的单结/串联钙钛矿太阳能电池方面取得了重大进展，这归因于其有前途的热稳定性和空气稳定性。然而，这些材料在钙钛矿发光二极管（PeLED）中的成功应用很少。在本文中，调节FABr：PbBr ₂前驱物浓度程序可用于制备基于CH（NH ₃）₂ PbBr ₃（FAPbBr ₃）的非常有效的PeLED 。所得的FAPbBr ₃在优化的10wt％条件下制备的薄膜显示出满意的激子辐射速率和低非辐射速率，以及高的光致发光量子产率。结合新颖的乙酸乙酯（EA）反溶剂旋转洗涤方法，所得FAPbBr ₃膜表现出致密，均匀和高覆盖的形态特征。PeLED分别显示出13.4 cd A ^-1的最大电流效率，3.5％的外部量子效率，接近10000 cd m ^-2的最大亮度和19.1 lm W ^-1的极高功率效率。在所有FAPbBr ₃型PeLED报道中，该性能都是最好的。