On the performance of polymer:organometal halide perovskite composite light emitting devices: The effects of polymer additives

摘要

The formation of the polymer:organometallic halide perovskite composites serves as a convenient and effective means to improve the morphology homogeneity of spin-coated perovskite films. Herein, we report the morphology, crystal structure and optoelectronic properties of the polymer:perovskite composites with a new polyacrylonitrile additive and make a direct comparison of the tributes with those of the widely-practiced poly (ethylene oxide) analogue. The results indicate the charge balance of light emitting devices depends on the polymer additive, which may relate to the extent of ion accumulation at the polymer:perovskite layer/hole injection layer interface.