Organic-inorganic heterostructure electroluminescent device using a layered perovskite semiconductor (C6H5C2H4NH3)2PbI4

Abstract

Using the combination of a layered perovskite compound (C6H5C2H4NH3)2PbI4 (PAPI), which forms a stable exciton with a large binding energy owing to its low-dimensional semiconductor nature and exhibits sharp and strong photoluminescence from the exciton band, and an electron-transporting oxadiazole derivative, we fabricated an organic–inorganic heterostructure electroluminescent (EL) device. The EL spectrum of the device corresponded well to the photoluminescence spectrum of the PAPI film; the emission was peaking at 520 nm and half-width of the emission was about 10 nm at liquid-nitrogen temperature. Further, highly intense EL of more than 10 000 cd m−2 was performed at 2 A cm−2 at liquid-nitrogen temperature in the device.

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

“…9 Metal halide perovskite-based LEDs have been fabricated both by solution processing and chemical vapor deposition methods. Perovskite materials were incorporated into LEDs functioning at liquid nitrogen temperature back in 90s 111 and room temperature-working bright LEDs were fabricated by solution processing of hybrid perovskites by Tan et al 9 In this device, emitting in the IR, a solution-processed CH 3 NH 3 PbI 3-x Cl x perovskite layer was sandwiched between TiO 2 and poly(9,9-dioctylfluorene) (F8) layers for effective radiate recombination of electrons and holes in the perovskite layer. The device produced a radiance of 13.2 W sr − 1 m − 2 at a current density of 363 mA cm − 2 , with internal and external quantum efficiencies of 3.4% and 0.76%, respectively.…”

Studying of Perovskite Nanoparticles in PMMA Matrix Used As Light Converter for Silicon Solar Cell

“…Due to reduced dimensionality, the bandgap and the exciton binding energy increased. The two dimensional structures of perovskites showed attractive optical properties like efficient photoluminescence, electroluminescence and non-linear optical effects due to strong quantum-confinement effect [10][11][12][13][14]. Important feature of these 2D perovskites is that they are more resistant to humidity than the 3D ones [15].…”

Benzimidazolium Lead Halide Perovskites: Effects of Anion Substitution and Dimensionality on the Bandgap

“…The alternating arrangement of high dielectric lead halide layers and low dielectric organic layers in 2D hybrid perovskites gives rise to an inherent multiple-quantum-well structure, which results in the formation of excitons with large exciton binding energies in the metal halide sheets. [1][2][3] The dielectric confinement effect entailing a sharp excitonic absorption peak can lead to interest- 4 with the known compound (C 7 H 7 N 2 )PbI 3 reveals an increase in bandgap on going from a 2D to a dimensionally reduced 1D topology. Besides, significant differences in the PL spectra of the halides are observed, which likely are due to recombination of self-trapped excitons stabilized through lattice distortions or permanent lattice defects in the compounds featuring broad PL emission bands.…”