Efficient Green Quasi-Two-Dimensional Perovskite Light-Emitting Diodes Based on Mix-Interlayer

Zirong Wang; Fanyuan Meng; Qi Feng; Shengxuan Shi; Langwen Qiu; Guanwei Sun; Zhao Chen; Qingguang Zeng; Weiguo Zhu; Shi-Jian Su

doi:10.3389/fchem.2021.825822

Efficient Green Quasi-Two-Dimensional Perovskite Light-Emitting Diodes Based on Mix-Interlayer

Front Chem. 2022 Jan 17:9:825822. doi: 10.3389/fchem.2021.825822. eCollection 2021.

Authors

Affiliations

¹ School of Applied Physics and Materials, Wuyi University, Jiangmen, China.
² State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, China.
³ Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Changzhou University, Changzhou, China.

Abstract

Recently, quasi-two-dimensional (Q-2D) perovskites have received much attention due to their excellent photophysical properties. Phase compositions in Q-2D perovskites have obvious effect on the device performance. Here, efficient green perovskite light-emitting diodes (PeLEDs) were fabricated by employing o-fluorophenylethylammonium bromide (o-F-PEABr) and 2-aminoethanol hydrobromide (EOABr) as the mix-interlayer ligands. Phase compositions are rationally optimized through composition and interlayer engineering. Meanwhile, non-radiative recombination is greatly suppressed by the introduction of mix-interlayer ligands. Thus, green PeLEDs with a peak photoluminescence quantum yield (PLQY) of 81.4%, a narrow full width at half maximum (FWHM) of 19 nm, a maximum current efficiency (CE) of 27.7 cd/A, and a maximum external quantum efficiency (EQE) of 10.4% were realized. The results are expected to offer a feasible method to realize high-efficiency PeLEDs.

Keywords: interlayer engineering; mix-interlayer; perovskite light-emitting diodes; phase compositions; quasi-two-dimensional perovskites.