Highly efficient quantum dot near-infrared light-emitting diodes
Gong, Xiwen1; Yang, Zhenyu1; Walters, Grant1; Comin, Riccardo1; Ning, Zhijun1,2; Beauregard, Eric1; Adinolfi, Valerio1; Voznyy, Oleksandr1; Sargent, Edward H.1
Source PublicationNATURE PHOTONICS
AbstractColloidal quantum dots (CQDs) are emerging as promising materials for constructing infrared sources in view of their tunable luminescence, high quantum efficiency and compatibility with solution processing(1). However, CQD films available today suffer from a compromise between luminescence efficiency and charge transport, and this leads to unacceptably high power consumption. Here, we overcome this issue by embedding CQDs in a high-mobility hybrid perovskite matrix. The new composite enhances radiative recombination in the dots by preventing transport-assisted trapping losses; yet does so without increasing the turn-on voltage. Through compositional engineering of the mixed halide matrix, we achieve a record electroluminescence power conversion efficiency of 4.9%. This surpasses the performance of previously reported CQD near-infrared devices two-fold, indicating great potential for this hybrid QD-in-perovskite approach.
Indexed BySCI ; EI
Funding ProjectKing Abdullah University of Science and Technology (KAUST)[KUS-11-009-21]
WOS Research AreaOptics ; Physics
WOS SubjectOptics ; Physics, Applied
WOS IDWOS:000372978900014
EI Accession Number20160902030529
EI KeywordsEfficiency ; Energy efficiency ; Infrared devices ; Light ; Light emitting diodes ; Light sources ; Luminescence ; Nanocrystals ; Perovskite ; Semiconductor quantum dots
Original Document TypeArticle
Citation statistics
Cited Times:181[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorSargent, Edward H.
Affiliation1.Univ Toronto, Dept Elect & Comp Engn, 10 Kings Coll Rd, Toronto, ON M5S 3G4, Canada
2.ShanghaiTech Univ, Sch Phys Sci & Technol, Haike Rd 100, Shanghai 201210, Peoples R China
Recommended Citation
GB/T 7714
Gong, Xiwen,Yang, Zhenyu,Walters, Grant,et al. Highly efficient quantum dot near-infrared light-emitting diodes[J]. NATURE PHOTONICS,2016,10(4):253-+.
APA Gong, Xiwen.,Yang, Zhenyu.,Walters, Grant.,Comin, Riccardo.,Ning, Zhijun.,...&Sargent, Edward H..(2016).Highly efficient quantum dot near-infrared light-emitting diodes.NATURE PHOTONICS,10(4),253-+.
MLA Gong, Xiwen,et al."Highly efficient quantum dot near-infrared light-emitting diodes".NATURE PHOTONICS 10.4(2016):253-+.
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