Ultrathin Light-Emitting Diodes with External Efficiency over 26% Based on Resurfaced Perovskite Nanocrystals
Source abstract
Abstract
High Resolution Image Download MS PowerPoint Slide Light-emitting diodes based on perovskite nanocrystals (PNCs-LEDs) have gained great interest for next-generation display and lighting technologies prized for their color purity, high brightness, and luminous efficiency which approach the intrinsic limit imposed by light extraction from the device structure. Although the time is ripe for the development of effective light outcoupling strategies to further boost the device performance, this technologically relevant aspect of PNC-LEDs is still without a definitive solution. Here, following theoretical guidelines and without the integration of complex photonic structures, we realize stable PNC-LEDs with external quantum efficiency (EQE) as high as 26.7%. Key to such performance is channeling the recombination zone in PNC emissive layers as thin as 10 nm, which we achieve by finely balancing charge transport using CsPbBr 3 PNCs resurfaced with a nickel oxide layer. The ultrathin approach is general and, in principle, applicable to other perovskite nanostructures for fabricating highly efficient, color-tunable transparent LEDs.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, China
State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310058, China
Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, 20125 Milano, Italy
Department of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, United States
Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
Macao Institute of Materials Science and Engineering (MIMSE), Macau University of Science and Technology, Taipa 999078, Macao, China
Funding
Shanghai Jiao Tong University · Ministry of Science and Technology of the People's Republic of China · Ministero dell'Istruzione, dell'Universit? e della Ricerca · Guangdong Province's Key R&D Program
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