期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 42, 页码 22378-22381出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm35305a
关键词
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资金
- Research Grants Council of Hong Kong [PolyU 5013/09P]
- HK PolyU grants [G-XY3E, G-YJ70, 1-ZV8N]
Graphene quantum dots (GQDs) have attracted great attention due to their unique optoelectronic properties. There remains a critical challenge to utilize the water-soluble GQDs for device applications. Here we report a facile method to fabricate a GQD-agar composite. The composite exhibits excellent optical stability and no luminescence quenching is observed. The composite is successfully applied as a colour converting material in blue light-emitting diodes (LEDs) to achieve white light emission. The luminous efficiency and light conversion efficiency of the white LED are 42.2 lm W-1 and 61.1% respectively. The light conversion efficiency of the WLED is stable for over 100 hours of continuous operation.
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