摘要
推导出了根据发光效能和光谱功率分布函数,计算了白光LED能量转换效率的公式,研究了1 W白光LED能量转换效率与工作电流、环境温度和发光效能之间关系,并对荧光粉涂敷前后白光LED能量转换效率的变化进行了分析。研究结果表明,5、1 W白光LED能量转换效率分别为22.67%和14.87%,1 W白光LED的能量转换效率,随着工作电流、环境温度的增加而下降,能量转换效率与发光效能比值基本恒定,荧光粉涂敷前后白光LED能量转换效率从21.2%下降到15.11%,荧光粉能量转换效率约为93%。
A calculating formula of the energy conversion efficiency of LEDs based distribution function and lumen efficiency was deduced. The relations between energy and current, environment temperature, lumen efficiency were discussed. Moreover, energy conversion efficiency after the phosphor layer was coated on the chip were also on the spectral power conversion efficiency the changes of the analyzed results show that the conversion efficiency of Φ5 and 1 W white LEDs are 22.67% and 14.87%. conversion efficiency of 1 W white LEDs is found to decrease with the increase of working The study The energy current and environment temperature, However, the ratio of the energy conversion efficiency and lumen efficiency is kept constantly. After the phosphor layer is coating, it is found that the energy conversion efficiency of 1 W white LEDs is decreased from 21.2% to 15.11%. The energy conversion efficiency of phosphor is about 93%.
出处
《半导体技术》
CAS
CSCD
北大核心
2008年第7期592-595,634,共5页
Semiconductor Technology
基金
国家自然科学基金资助项目(20675042)
江苏省南通市科技计划资助项目(A5034)
