High-Efficiency Light-Emitting Diodes Based on Formamidinium Lead Bromide Nanocrystals and solution processed transport layers
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hdl:2117/121078
Tipus de documentArticle
Data publicació2018-09-11
EditorACS
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteNANOPTO - Novel processing of colloidal nanocrystals for optoelectronic applications (EC-H2020-703018)
NAROBAND - Environmental friendly narrow band-gap colloidal nanocrystals for optoelectronic devices (EC-H2020-750600)
HEINSOL - Hierarchically Engineered Inorganic Nanomaterials from the atomic to supra-nanocrystalline level as a novel platform for SOLution Processed SOLar cells (EC-H2020-725165)
NAROBAND - Environmental friendly narrow band-gap colloidal nanocrystals for optoelectronic devices (EC-H2020-750600)
HEINSOL - Hierarchically Engineered Inorganic Nanomaterials from the atomic to supra-nanocrystalline level as a novel platform for SOLution Processed SOLar cells (EC-H2020-725165)
Abstract
Perovskite nanocrystal light-emitting diodes (LEDs) employing architecture comprising a ZnO nanoparticles electron-transport layer and a conjugated polymer hole-transport layer have been fabricated. The obtained LEDs demonstrate a maximum external-quantum-efficiency of 6.04%, luminance of 12998 Cd/m2 and stable electroluminescence at 519 nm. Importantly, such high efficiency and bright-ness have been achieved by employing solution processed transport layers, formamidinium lead bromide nanocrystals (CH(NH2)2PbBr3 NCs) synthesized at room-temperature and in air without the use of a Schlenk line, and a procedure based on atomic layer deposition to insolubilize the NC film. The obtained NCs show a photoluminescence quantum yield of 90% that is retained upon film fabrication. The results show that perovskite NC LEDs can achieve high-performance without the use of transport layers deposited through evaporation in ultra-high-vacuum.
CitacióStasio, F. D. [et al.]. High-Efficiency Light-Emitting Diodes Based on Formamidinium Lead Bromide Nanocrystals and solution processed transport layers. "Chemistry of Materials", 11 Setembre 2018.
ISSN0897-4756
Versió de l'editorhttps://pubs.acs.org/doi/10.1021/acs.chemmater.8b03079
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