Multicolored Organic/Inorganic Hybrid Perovskite Light‐Emitting Diodes

Abstract

Bright organic/inorganic hybrid perov-skite light-emitting diodes (PrLEDs) are realized by using CH3 NH3 PbBr3 as an emitting layer and self-organized buffer hole-injection layer (Buf-HIL). The PrLEDs show high luminance, current efficiency, and EQE of 417 cd m(-2) , 0.577 cd A(-1) , and 0.125%, respectively. Buf-HIL can facilitate hole injection into CH3 NH3 PbBr3 as well as block exciton quenching.

Periodic Organic–Inorganic Halide Perovskite Microplatelet Arrays on Silicon Substrates for Room‐Temperature Lasing

“…This outstanding performance can be traced to their long carrier lifetimes, long diffusion length, and low trap densities 9, 10, 11, 12. These excellent properties, along with their high quantum yield and wavelength tunability, make halide perovskites ideal for light‐emission applications such as for light‐emitting diodes (LEDs), light‐emitting field‐effect transistors, and lasing 13, 14, 15, 16, 17, 18, 19. Since the first demonstration of ultrastable amplified spontaneous emission (ASE) with broad spectral tunability from perovskite thin films and lasing from perovskite crystals,20 perovskite lasing in a broad range of cavity structures, including microplatelets,21 nanowires,22 microspheres,23 and distributed Bragg reflection (DBR) mirrors,24 have been realized 25.…”

Green light-emitting diode from bromine based organic-inorganic halide perovskite

“…The ever reported LEDs based on these halide perovskites which show electroluminescence in near-infrared, red and green region and a luminance of ~364 cd m −2 was achieved 1 B eijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China 2 University of Chinese Academy of Sciences, Beijing 100190, China * Corresponding authors (emails: dhl522@iccas.ac.cn (Dong H); huwp@iccas.ac.cn (Hu W)) when the thickness of the active layer was 20 nm. Lately, an improved luminance of 417 cd m −2 was obtained for multicolored perovskites-LEDs based on a 40 nm emitter layer, which is due to the reduced carrier injection barrier for efficient electroluminescence [24]. However, further application remains challenging owing to the toxicity of Pb atom, poor long-term stability and low luminance.…”

“…The ever reported LEDs based on these halide perovskites which show electroluminescence in near-infrared, red and green region and a luminance of ~364 cd m −2 was achieved when the thickness of the active layer was 20 nm. Lately, an improved luminance of 417 cd m −2 was obtained for multicolored perovskites-LEDs based on a 40 nm emitter layer, which is due to the reduced carrier injection barrier for efficient electroluminescence [24]. However, further application remains challenging owing to the toxicity of Pb atom, poor long-term stability and low luminance.…”

Universal high work function flexible anode for simplified ITO-free organic and perovskite light-emitting diodes with ultra-high efficiency

“…39 In addition, the surface-enriched insulating PFSA blocks electrons from cathodes and suppresses exciton quenching at the anode and MAPbBr 3 interface. 40,41 The MAPbBr 3 film on top of PEDOT:PSS (high conductivity), which directly contacted with the overlying MAPbBr 3 layer without the insulating PFSA, showed very short photoluminescence lifetime, and the photoluminescence lifetime was dramatically increased as the PFSA in AnoHIL increased (Supplementary Table S6 and Supplementary Figure S5). The variation of polymeric anodes did not influence the crystal structures of the overlying MAPbBr layer (Supplementary Figure S6).…”

“…[38][39][40] Green organic-inorganic hybrid perovskite emitters, MAPbBr 3 , were used as a light-emission layer, and polymeric anodes, including AnoHIL and PEDOT:PSS (high conductivity), were used as anodes (Figure 2d and Supplementary Figure S4a Table S5 and Supplementary Figure S4c). The angle-dependent emission profile of our PeLEDs was very similar to Lambertian, 39 and the accurate EQEs were calculated from the emission profile.…”