Discussion on Thermal Coefficient Measurement and Life Estimation of temperature Coefficient of Different Epitaxial Structures of III-VCompound Semiconductor -High Power LED as an example

• Main Authors: Su-Chen Chuang, 莊淑珍
• Other Authors: Yun-Shiow Chen
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/6nchb7

碩士 === 元智大學 === 工業工程與管理學系 === 105 === Abstract Boost of photo-electric conversion efficiency in LED to reduce carbon dioxide emission is an environmentally conscious manufacturing measure, claimed by Japan, United States, and the European Union, to prevent climate change and global warming in the International Kyoto Protocol. The study used the combination of thermal resistance measurement and integrating sphere measurement with Pearson product-moment correlation to analyze the relationship of photo-electric conversion efficiency in LED of different wavelengths and its carbon footprint to operating current, junction temperature, photo-electric conversion efficiency, and temperature coefficient of relative luminous flux (Kvalue). And, the influence by factors of different currents and wavelengths on carbon footprint were analyzed by variance analysis, as well as identifying any statistical significance in the carbon footprint of different thermal resistance measurements, where the Kvalues of LED of different wavelengths were input in the simulation software for verification. The research proposed an effective reduction in carbon dioxide emission by increasing photo-electric conversion efficiency of high power LED. Key words: III-V compound semiconductor,Thermal resistance measurement, Pearson product-moment correlation,Variance analysis