金属卤化物钙钛矿发光二极管（Perovskite light?emitting diodes，Pero?LEDs）器件结构中，空穴传输层（HTL）是影响Pero?LEDs效率的关键性因素之一。由于醋酸钴（Co（OAc）₂）薄膜具有优异的光电特性，所以选其作为绿光Pero?LEDs的HTL。然而，纯的钴基底薄膜存在传输载流子能力较差、薄膜粗糙度较大等问题。因此，本文通过引入有机小分子添加剂乙醇胺（ETA）来有效调控传输层中Co³⁺/Co²⁺比例，提升传输层的导电能力。同时，因ETA的加入可以减缓退火过程中前驱体溶液的析出结晶速度，从而形成粗糙度较小的HTL薄膜，进而有利于形成高质量的钙钛矿薄膜。基于掺杂的HTL，其最优器件亮度高达45 207 cd/m²，最大外量子效率（EQE）达到15.08%，是一种性能较好的新型HTL。

Halide perovskites have attracted great attention due to their high color purity, high luminance yield, low non-radiative recombination rate, and solution processability. Although the external quantum efficiency of perovskite light-emitting diodes (PeLEDs) is comparable with that of the organic light-emitting diodes (OLEDs) and quantum-dots light-emitting diodes (QLEDs), the brightness is still low compared with the traditional OLEDs and QLEDs. Herein, we demonstrate high brightness and high-efficiency CsPbBr3-based PeLEDs using interface and bulk controlled nanocrystal growth of the perovskite emission layer. The interface engineering by ethanolamine and bulk engineering by polyethylene glycol led to highly crystallized and cubic-shaped perovskite nanocrystals with smooth and compact morphology. As a result, PeLEDs with a high brightness of 64756cd/m2 and an external quantum efficiency of 13.4% have been achieved.