Facile synthesis of YAG:Ce3+ thick films for phosphor converted white light emitting diodes

Yunyun Zhao, Huarui Xu, Xiuyun Zhang, Guisheng Zhu, Dongliang Yan, Aibing Yu

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)

Abstract

A crucial barrier in the development of YAG:Ce3+ phosphor films in the application for phosphors converted white light emitting diodes (pc-WLEDs) is to prepare the films, which are thick enough to provide considerable optical performance for matching the optical properties of the blue light chip. To overcome this barrier, this study reports a novel sol-gel method that takes advantage of the combustion pyrolysis process with glycine and urea as fuel. Transparent luminescent YAG:Ce3+ phosphor film with a thickness of 5.1?m and homogeneous grain size of 60nm was obtained on quartz substrate. The as-synthesized YAG:Ce3+ phosphor films have a quantum yield of 56 at 457nm excitation. The YAG:Ce3+ phosphor films incorporated into pc-WLED were shown to have a slightly lower luminous efficacy of 82lm/W, but a warmer correlated colour temperature of 4536K as well as a higher colour rendering index of 75.8.
Original languageEnglish
Pages (from-to)3761 - 3764
Number of pages4
JournalJournal of the European Ceramic Society
Volume35
Issue number13
DOIs
Publication statusPublished - 2015

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