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Open AccessArticle

Efficient and Stable CdSe/CdS/ZnS Quantum Rods-in-Matrix Assembly for White LED Application

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Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin 300401, China
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SHINEON Co., LTD., Building 3, No. 58 Jinghai Road, BDA, Beijing 100176, China
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Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(2), 317; https://doi.org/10.3390/nano10020317
Received: 22 January 2020 / Revised: 5 February 2020 / Accepted: 7 February 2020 / Published: 12 February 2020
(This article belongs to the Section Synthesis, Interfaces and Nanostructures)
CdSe/CdS core-shell quantum rods (QRs) are a promising prospect in optoelectronic applications but usually have a relatively low quantum efficiency and stability. Here, we report on an efficient and stable CdSe/CdS/ZnS QRs-in-matrix assembly (QRAs) by growing and embedding CdSe/CdS QRs in ZnS matrices. Structural characterizations show that the CdSe/CdS QRs are encapsulated and interconnected by ZnS in the QRAs structure. The stable ZnS encapsulation renders the CdSe/CdS QRs high quantum efficiency (QE) up to 85%. The QRAs also present high photo- and thermal-stability and can preserve 93% of the initial QE at 100 °C. The QRAs powder presents a light degradation of only 2% under continuous excitation for 100 h, displaying profound potential in optoelectronic applications. White light-emitting diodes (WLEDs) are fabricated by packaging the QRAs powder as phosphor on top of blue GaN chip. The WLED shows high optical performance and light quality. View Full-Text
Keywords: quantum rod; core-shell; assembly; light-emitting diodes; stability quantum rod; core-shell; assembly; light-emitting diodes; stability
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MDPI and ACS Style

Chen, Y.; Xing, W.; Liu, Y.; Zhang, X.; Xie, Y.; Shen, C.; Liu, J.G.; Geng, C.; Xu, S. Efficient and Stable CdSe/CdS/ZnS Quantum Rods-in-Matrix Assembly for White LED Application. Nanomaterials 2020, 10, 317.

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