Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 774, Issue -, Pages 954-961Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.09.395
Keywords
LED; Phosphor-in-glass; Graphene; Heat dissipation
Categories
Funding
- National Natural Science Foundation of China [51603037]
- Shanghai Natural Science Foundation [15ZR1401200, 16ZR1401500]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Program of Shanghai Academic Research Leader [16XD1400100]
- Science and Technology Commission of Shanghai Municipality [16JC1400700]
- Innovation Program of Shanghai Municipal Education Commission [2017-01-07-00-03-E00055]
- Program of Introducing Talents of Discipline to Universities [111-2-04]
- Fundamental Research Funds for the Central Universities [16D310609]
- Shanghai ChenGuang Program [15CG33]
- Shanghai Sailing Program [16YF1400400]
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A well dispersed graphene oxide sol was prepared by the improved Hummer method. The atomic force micrographs showed a monolayer structure and larger sheet area. Aiming at improving the poor heat dissipation ability of Phosphor-in-glass (PiG)for remote packaged LED, the reduced graphene oxide film was prepared by photoreduction that after the sol was coated on PiG. UV-Vis spectra showed that the degree of reduction of graphene oxide was related to the illumination time, while the reduced graphene film had high transmittance without affecting the luminescent properties of the fluorescent material. At the same time, the excellent thermal conductivity of the film significantly enhanced the cooling capacity of the PiG, which has a lower stable operating temperature and a higher luminous intensity under highpower excitation compared with the uncoated ones. Software simulation also showed similar results of heat dissipation. (C) 2018 Elsevier B.V. All rights reserved.
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