Highly stable hybrid perovskite light-emitting diodes based on Dion-Jacobson structure

Abstract

Organic-inorganic hybrid halide perovskites are emerging as promising materials for next-generation light-emitting diodes (LEDs). However, the poor stability of these materials has been the main obstacle challenging their application. Here, we performed first-principles calculations, revealing that the molecule dissociation energy of Dion-Jacobson (DJ) structure using 1,4-bis(aminomethyl)benzene molecules as bridging ligands is two times higher than the typical Ruddlesden-Popper (RP) structure based on phenylethylammonium ligands. Accordingly, LEDs based on the DJ structure show a half-lifetime over 100 hours, which is almost two orders of magnitude longer compared with those based on RP structural quasi–two-dimensional perovskite. To the best of our knowledge, this is the longest lifetime reported for all organic-inorganic hybrid perovskites operating at the current density, giving the highest external quantum efficiency (EQE) value. In situ tracking of the film composition in operation indicates that the DJ structure was maintained well after continuous operation under an electric field.

Highly‐Anisotropic Dion–Jacobson Hybrid Perovskite by Tailoring Diamine into CsPbBr3 for Polarization‐Sensitive Photodetection

“…[ 14 ] Y. Shang et al reported that the DJ‐phase structure would be beneficial to improve the device lifetime of LEDs, because the molecule dissociation energy of diammonium cation (i.e., 1,4‐bis(aminomethyl)benzene) in DJ‐type perovskites is higher than that of RP‐type perovskites containing phenylethylammonium ligands. [ 15 ] In addition, diammonium cation can be used as an additive in the perovskite ink formulation (MAPbI 3 ), which significantly improves efficiency and stability of perovskite solar cells. [ 16 ] More recently, Rashba effect and robust ferroelectricity have been observed in the DJ‐type perovskite of [4‐(aminomethyl)piperidinium]PbI 4 .…”

Organic additive engineering toward efficient perovskite light‐emitting diodes

“…PeLEDs have achieved a half-lifetime over 100 hours with DJ-type perovskite materials as emitting layers. 90 Hence, DJ-type perovskite materials is a promising alternative solution to achieving stable PeLEDs.…”

Enhanced emission from CH3NH3PbBr3 perovskite films by graphene quantum dot modification

“…Organic-inorganic hybrid perovskites have attracted significant interest in solution processed high-performance optoelectronic devices [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Besides the great success in photovoltaics, their unique optical and electrical properties make hybrid perovskites promising candidates for next generation light emitting diodes (LEDs) [19][20][21][22][23][24][25][26]. Many efforts have been made to enhance the luminescence from hybrid perovskites, such as passivating defects [27][28][29][30][31], constructing multiple quantum wells [30], utilizing plasmonic structures [31,32], and so on.…”