Spectroscopy and Spectral Analysis, Volume. 31, Issue 6, 1450(2011)
The Effect of Temperature on the PL Spectra of High Power LED
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.
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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
Paper Information
Received: Jun. 28, 2010
Accepted: --
Published Online: Jan. 5, 2012
The Author Email: Tian-ping DING (terry.dtp@emails.bjut.edu.cn)
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