光谱学与光谱分析, 2011, 31 (6): 1450, 网络出版: 2012-01-05
温度对功率LED光谱特性的影响
The Effect of Temperature on the PL Spectra of High Power LED
发光二极管 温度 光谱 峰值波长 辐射通量 色温 Light emitting diode Temperature Spectrum Peak wavelength Radiant flux Color temperature
摘要
制备了两种1 W白光功率发光二极管(LED), 这两种样品分别是对台湾和美国两家公司生产的蓝光芯片, 涂敷相同荧光粉和透明硅胶封装而成。 对制备好的LED进行了变温光学特性测试, 温度变化范围为15~75 ℃, 测试电流为350 mA。 结果表明: 温度变化对LED的峰值波长, 辐射通量、 色温等参数都有影响。 通过对光谱曲线的数据处理, 找到了LED性能随温度的变化关系, 并从原理上分析了峰值波长、 辐射通量、 色温随温度变化的原因, 提出了改进白光LED温度特性的建议。
Abstract
Two kinds of 1 W white high power light emitting diode (LED) were made by packaging blue chips from Taiwan and US. The chips were coated by the same phosphor and transparent silica gel. Optical properties of the two kinds of LEDs were investigated in the temperature range of 15～75 ℃ and at the current of 350 mA. The results show that temperature badly affects the optical parameters such as peak wavelength, radiant flux, color temperature and so on. After analyzing the PL spectrum, the relationship between temperature and LED performance was found. The reasons for optical parameters vs. temperature were theoretically analyzed. Some suggestions were given to reduce the influence of temperature on power LED.
丁天平, 郭伟玲, 崔碧峰, 尹飞, 崔德胜, 闫薇薇. 温度对功率LED光谱特性的影响[J]. 光谱学与光谱分析, 2011, 31(6): 1450. DING Tian-ping, GUO Wei-ling*, CUI Bi-feng, YIN Fei, CUI De-sheng, YAN Wei-wei. The Effect of Temperature on the PL Spectra of High Power LED[J]. Spectroscopy and Spectral Analysis, 2011, 31(6): 1450.
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