This paper elucidates the increased luminescence efficiency of CsPbBr_2.1Cl_0.9 sky-blue perovskite light-emitting diodes (PeLEDs) achieved through the interface modification of 3,4 ethylenedioxythiophene (PEDOT):polystyrene sulfonic acid (PSS)/quasi-two-dimensional (QTD) perovskite using CsCl and CsBr materials, respectively. QTD films were fabricated using ratios of CsPbBr_2.1Cl_0.9 doped with phenethylamine hydrobromide (PEABr) at 60%, 80%, and 100%. The solvent dimethyl sulfide (C₂H₆OS) was employed under the excitation of ambient and 365-nm laser lights. The PeLED structure was composed of Al/LiF/2,2',2"-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi)/CsPbBr_2.1Cl_0.9:PEABr/interface modification layer/PEDOT:PSS/ITO glass. The optimized results revealed that the luminance, current efficiency, and external quantum efficiency of the QTD CsPbBr_2.1Cl_0.9:80% PEABr PeLED with the CsCl interface modification additive was 892 cd/m², 3.87 cd/A, and 5.56%, respectively.

本文阐述了通过_3,4乙烯二氧噻吩（PEDOT）：聚苯乙烯磺酸（PSS）/准二维（ QTD）分别使用CsCl和CsBr材料的钙钛矿。使用掺杂比例为 60%、80% 和 100% 的氢溴酸苯乙胺 (PEABr) 的 CsPbBr _2.1 Cl _0.9制备 QTD 薄膜。在环境光和365 nm激光的激发下使用溶剂二甲基硫醚(C ₂ H ₆ OS)。 PeLED结构由Al/LiF/2,2',2"-(1,3,5-苯并三基)-三(1-苯基-1-H-苯并咪唑)(TPBi)/CsPbBr _2.1 Cl _0.9 :PEABr组成/界面改性层/PEDOT:PSS/ITO玻璃 优化结果表明，添加CsCl界面改性添加剂的QTD CsPbBr _2.1 Cl _0.9 :80% PEABr PeLED的亮度、电流效率和外量子效率为892 cd/m。 ² 、分别为3.87cd/A和5.56%。