Development of rear earth free oxynitride phosphor and their application for white LED

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656413
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: Hiroshima University
• Principal Investigator: OKUYAMA Kikuo 広島大学, 工学(系)研究科(研究院), 特任教授 (00101197)
• Co-Investigator(Kenkyū-buntansha): OGI Takashi 広島大学, 大学院工学研究科, 准教授 (30508809)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 発光材料 / 白色LED / 蛍光体 / 微粒子合成 / レアアースフリー / 固相法

Outline of Final Research Achievements

In this project, we focused on the development of highly luminescent rare-earth free BCNO phosphor and their application to white LED. As a result, the following results were obtained. (1) A polyethyleneimine provided BCNO phosphors with the high internal quantum efficiency. (2) XAFS spectra indicated the BCNO phosphor consists of B-N, B-O, N-O bond including SP3 carbon (3) A microwave heating can be used to synthesize BCNO nanoparticle phosphors. In addition, light-emitting polymer could be synthesized from a mixture of the prepared BCNO nanoparticles and a polyvinyl alcohol.

Free Research Field

微粒子工学