Critical Role of Organic Spacers for Bright 2D Layered Perovskites Light-Emitting Diodes.

ABSTRACT: Light-emitting diodes (LEDs) made with quasi-2D/3D and layered perovskites have undergone an unprecedented surge as their external quantum efficiency (EQE) is rapidly approaching other lighting technologies. Manipulating the charge recombination pathway in semiconductors is highly desirable for improving the device performance. This study reports high-performance layered perovskites LEDs with benzyl ring as spacer where radiative recombination lifetime is longer, compared with much shorter alkyl chain spacer yields. Based on detailed optical and X-ray absorption spectroscopy measurements, direct signature of charges localization is observed near the band edge in exchange with the shallow traps in benzyl organics containing layered perovskites. As a result, it boosts the photoluminescence i

SUBMITTER: Tsai H 

PROVIDER: S-EPMC7141028 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature