Journal
SCIENCE CHINA-MATERIALS
Volume 62, Issue 10, Pages 1463-1469Publisher
SCIENCE PRESS
DOI: 10.1007/s40843-019-9435-7
Keywords
quantum dot; silica coating; color filter; ligand exchange
Categories
Funding
- National Key Research and Development Program of China [2016YFB0401702]
- National Natural Science Foundation of China [61674074, 61704072, 61405089]
- Shenzhen Innovation Project [JCYJ20160301113537474]
- Shenzhen Basic Research Project [JCYJ20170817112012493]
- Development and Reform Commission of Shenzhen Project [[2017]1395]
- Shenzhen Peacock Team Project [KQTD2016030111203005]
- Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting [ZDSYS201707281632549]
- Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting [2017KSYS007]
- Distinguished Young Scholar of National Natural Science Foundation of Guangdong [2017B030306010]
- Tianjin Zhonghuan Quantum Tech Co., Ltd. [18YFZCGX00580]
- Southern University of Science and Technology
- Pico Center at SUSTech
- Presidential fund and Development and Reform Commission of Shenzhen Municipality
- China Postdoctoral Science Foundation [2018M631443]
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A highly pixelated and luminescent silica-coated quantum dot color filter (QDCF) was achieved by surface conjugation with epoxy functional group. Epoxy-functiona-lized silica-coated quantum dots (QDs) can be thoroughly mixed with SU-8 photoresist up to 25 wt.% without aggregation. The quantum yield (QY) of the silica-coated QDCF can be significantly improved from 19.3% to 36.5% after epoxy treatment. The pristine QDCF experienced a 40% QY decrease, while the epoxied silica-coated QDCF maintained its luminescence even after irradiation (300 mW cm (-2) @450 nm) for over 25 days. The well-controlled epoxy cap plays a critical role in attaining the ideal optical properties of the QDCF.
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