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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201905824
|2 doi
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|a pubmed24n1015.xml
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|a (NLM)31867764
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|a eng
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|a Liu, Baiquan
|e verfasserin
|4 aut
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|a Record High External Quantum Efficiency of 19.2% Achieved in Light-Emitting Diodes of Colloidal Quantum Wells Enabled by Hot-Injection Shell Growth
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Colloidal quantum wells (CQWs) are regarded as a highly promising class of optoelectronic materials, thanks to their unique excitonic characteristics of high extinction coefficients and ultranarrow emission bandwidths. Although the exploration of CQWs in light-emitting diodes (LEDs) is impressive, the performance of CQW-LEDs lags far behind other types of soft-material LEDs (e.g., organic LEDs, colloidal-quantum-dot LEDs, and perovskite LEDs). Herein, high-efficiency CQW-LEDs reaching close to the theoretical limit are reported. A key factor for this high performance is the exploitation of hot-injection shell (HIS) growth of CQWs, which enables a near-unity photoluminescence quantum yield (PLQY), reduces nonradiative channels, ensures smooth films, and enhances the stability. Remarkably, the PLQY remains 95% in solution and 87% in film despite rigorous cleaning. Through systematically understanding their shape-, composition-, and device-engineering, the CQW-LEDs using CdSe/Cd0.25 Zn0.75 S core/HIS CQWs exhibit a maximum external quantum efficiency of 19.2%. Additionally, a high luminance of 23 490 cd m-2 , extremely saturated red color with the Commission Internationale de L'Eclairage (CIE) coordinates of (0.715, 0.283), and stable emission are obtained. The findings indicate that HIS-grown CQWs enable high-performance solution-processed LEDs, which may pave the path for future CQW-based display and lighting technologies
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|a Journal Article
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|a colloidal quantum wells
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|a core/shell structures
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|a hot injection
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|a light-emitting diodes
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4 |
|a nanoplatelets
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1 |
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|a Altintas, Yemliha
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Lin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shendre, Sushant
|e verfasserin
|4 aut
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1 |
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|a Sharma, Manoj
|e verfasserin
|4 aut
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| 700 |
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|a Sun, Handong
|e verfasserin
|4 aut
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|a Mutlugun, Evren
|e verfasserin
|4 aut
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|a Demir, Hilmi Volkan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 8 vom: 03. Feb., Seite e1905824
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:32
|g year:2020
|g number:8
|g day:03
|g month:02
|g pages:e1905824
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|u http://dx.doi.org/10.1002/adma.201905824
|3 Volltext
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