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《中国工程科学》 >> 2020年 第22卷 第2期 doi: 10.15302/J-SSCAE-2020.02.011

全光谱 LED 照明用荧光粉发展现状及趋势

1. 有研稀土新材料股份有限公司,北京 100088;

2. 有研科技集团有限公司稀土材料国家工程研究中心,北京 100088;

3. 北京有色金属研究总院,北京 100088

资助项目 :中国工程院咨询项目“新兴产业发展战略研究(2035)”(2018-ZD-12) 收稿日期: 2019-12-10 修回日期: 2020-03-03 发布日期: 2020-04-02

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摘要

随着人们对照明品质要求的提高,全光谱发光二极管(LED)照明成为发展热点。本文对全光谱 LED 用关键材料——荧光粉进行了详细分析,对比了每种体系的发光性能并给出了各类型的代表材料,重点阐述了紫光–近紫外光激发的多种颜色荧光粉的优劣势、研究进展以及实际应用情况,对该领域存在问题及其发展趋势、重点产业发展方向进行了分析和展望。目前可供全光谱使用的紫光–近紫外光激发的荧光粉存在蓝粉和青粉普遍发射光谱窄、光效偏低和热稳定性较差,黄粉及远红光荧光粉对紫光或近紫外光的吸收较低导致发光效率不佳,单一基质白光荧光粉的红光发射不足等问题,其中发光光效和热稳定性仍然是制约各类荧光粉应用的关键因素。研究提出,可重点突破适合紫光–近紫光激发高光效和高热稳定性的宽谱蓝粉、青粉、黄绿粉、黄粉、长波红粉以及单一基质白光荧光粉的制备和应用技术,开发与现有应用产品体系相匹配的高效及连续化制备技术,由此促进全光谱 LED 的进一步发展。

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