固态照明光源的基石_氮化镓基白光发光二极管.pdfVIP

物理学和高新技术 固态照明光源的基石 ———氮化镓基白光发光二极管 张国义 　　陈志忠 (北京大学物理学院　人工微结构和介观物理国家重点实验室　北京大学宽禁带半导体研究中心　北京　100871) ( ) 摘 　要 　　首先回顾了照明光源的简单历史 ,然后介绍了发光二极管 LED 发展到大功率白光LED 的历史 ,接着简 述了国内外发展现状 ,主要技术路线及其特点. 最后阐述了作者在这方面的研究工作进展状况 ,对其发展趋势提出 了一些看法. 关键词 　　固态照明 ,GaN , 白光发光二极管,发光效率 The basis of solid state lightingGa N white light emitting diodes ZHANG GuoYi 　　CHEN ZhiZhong ( School of Physics State , State Key Laboratory for Mesoscopic Physics , ) Research Centerfor Widegap Semiconductors , Peking University , Beijing 　100871, China Abstract 　　The history of light sources is briefly reviewed. The evolution of light emitting diodes (LEDs) is traced from the earliest red LED to the high power white LED. The development of solid state lighting throughout the world (including China) is described briefly , as well as the main fabrication techniques and their features. The status of the GaN based LED program in Peking University and the outlook for solid state lighting are discussed. Key words 　　solid state lighting , GaN , white LED , luminous efficacy ( [1 ] ) 于钨丝灯泡的发明而进入实用化阶段 见图 1 , 1 　引言 白炽灯的发明使人类的生产、社会活动时间延续至