摘要
提出一种运用相对光谱的整体差异表征AlGaInP基LED结温的方法.首先使用光谱仪测量不同驱动电流、不同衬底温度下,不同颜色AlGaInP基LED的相对光谱,计算同一LED不同结温条件下相对光谱之间的差异,然后分析相对光谱差异与结温变化量之间的线性度,最后比较相对光谱差异法与峰值波长法测量的准确性.研究表明:相对光谱差异与LED结温变化成正比,相对光谱差异法的准确度和测量误差随光谱仪带宽的增大而增大.当光谱仪带宽为2nm时,其准确度优于采用带宽为1nm的峰值波长法;当带宽为5nm时,其准确度与带宽为1nm的峰值波长法相当.
A method for determining A1GaInP-based LED junction temperature was developed based on the relative spectral difference. The relative spectra of different LED with various drive currents and substrate temperatures were measured by spectrometer, and the differences of LED relative spectra were calculated. And then the linearity of the relative spectral differences and junction temperatures was analyzed. At last, the aeurracy of the proposed method was compared with the peak wavelength method. The results show good positive correlation between relative spectral difference and junction temperatue. The acurrucy and the error of the proposed method become worse as the bandwith of spectrometer increases. The acurrucy of proposed method with the spectrometer of 2 nm bandwith is much higher than the peak wavelenght method of 1 nm bandwith. While the propose method of 5 nm bandwith has the same acurrucy with the peak wavelenght method of 1 nm bandwith.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2014年第9期140-144,共5页
Acta Photonica Sinica
基金
国家自然科学基金(No.81170873)
常州工学院重点项目(No.YN1209)
常州光电技术研究院项目(No.CZGY003)资助
关键词
光谱学
结温测试
光谱分析
发光二极管
光谱仪
带宽
Spectroscopy
Junction temperature measurement
Spectral analysis
Light emitting diodeSpectrometer
Bandwidth
