DataVXACS Applied Materials & InterfacesPaper
journal article·2021-07-14

Alloyed Green-Emitting CdZnSeS/ZnS Quantum Dots with Dense Protective Layers for Stable Lighting and Display Applications

Hongcheng Yang, Yizun Liu, Junjie Hao, Haodong Tang, Shihao Ding, Zhaojin Wang, Fan Fang, Dan Wu, Wenda Zhang, Haochen Liu, Bing Xu, Rui Lu, Lei Yang, Pai Liu, Kai Wang, Xiao Wei Sun

ACS Applied Materials & Interfaces· Volume 13· Issue 27
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Source abstract

Abstract

Alloyed green-emitting CdZnSeS/ZnS quantum dots (QDs) demonstrate potential applications in solid-state lighting and displays owing to their various advantages, such as high color purity, light conversion efficiency, and color rendering index. However, their applications in white light-emitting diodes (WLEDs) are limited by their poor photostabilities on blue-emitting gallium nitride (GaN) LED chips. In this study, the effect of the specific surface area (SSA) in the coating layers on the photostabilities of QDs was investigated. SSA was adjusted by controlling the proportions of dense aluminum oxide (AlOX) layers and porous silica dioxide (SiO2) layers to fabricate QD protective layers via a catalyst-free sol–gel method. The results showed that the synthesized AlOX possessing the lowest SSA among the synthesis protective layers presented the best QD photostabilities on the LED chips. Moreover, they exhibited a 9.9-fold increase in the operational lifetime (T80) compared to that of pristine QDs. In addition, the QD-based WLED achieved an excellent display performance with a wide color gamut (115%) of the National Television System Committee (NTSC) color gamut standard. This approach offers a promising strategy for enhancing the QD photostabilities for applications in solid-state lighting and displays by coating the protective layers on the QD surface.
Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloysCatalysis & surfaces

OpenAlex topics: Quantum Dots Synthesis And Properties · Perovskite Materials and Applications · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting, Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen 518055, China

Shenzhen Planck Innovation Technologies Co., Ltd., Shenzhen 518116, Guangdong, China

Tianjin Zhonghuan Quantum Tech Co., Ltd., Tianjin 300380, China

Funding

Ministry of Science and Technology of the People's Republic of China · Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting · Southern University of Science and Technology · National Natural Science Foundation of China · Guangdong Youth Innovative Talents Project · Shenzhen Science and Technology Innovation Committee · Guangdong Province · Tianjin Science and Technology Support Key Projects · Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting · Shenzhen Innovation Project

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