LED光谱温度特性测试与分析  

Measurement and analysis of characteristic of LED spectrals temperature

作　　者：刘宏伟[1] 杨华[1] 程俊超[1] 郭凯[1] 

机构地区：[1]天津工业大学电子与信息工程学院,天津300387

出　　处：《天津工业大学学报》2016年第4期85-88,共4页Journal of Tiangong University

基　　金：国家自然科学基金青年基金项目(11404239);天津市自然科学基金青年基金项目(14JCQNJC01000)

摘　　要：搭建由半导体制冷片和光谱仪组成的LED变温发光特性测试系统，使用多通道温度测试仪记录芯片工作温度，得到LED芯片在30-80℃范围内的发光特性与温度的关系。结果表明：在输入电流恒定时，随着芯片材料温度的不断升高，LED的电功率和光功率降低，LED光效下降趋势明显；同时由于材料禁带宽度减小， GaN LED的蓝光峰值波长发生红移；通过上述测试，利用数值拟合方式得到了芯片发光特性与温度之间的函数关系。A temperature changing LED spectral measurement system is built, which consisted of semiconductor refrigerating piece and spectrometers,using multi-channel temperature tester to test the chip′s temperature. The relationship between LED spectrum and temperature is measured from 30℃to 80℃. The tested result shows that when the input current is constant, with the temperature increasing, LED electrical power, luminous flux and electro-optic efficiency are reduced. GaN LED peak wavelength is red shift due to band gap diminishing. The function of temperature and light attenuation is obtained by numerical fitting test results.

关 键 词：LED光功率 光效 温度 峰值波长 

分 类 号：TN364.2[电子电信—物理电子学]