A comparison between time-resolved electroluminescence mapping and time-resolved optical beam induced current mapping in large area LEDs

• Main Authors: Chin-shu Weng, 翁金樹
• Other Authors: Fu-jen Kao
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/5m9557

碩士 === 國立中山大學 === 光電工程研究所 === 96 === The major purpose of LED is the electroluminescence. We use the time-resolved electroluminescence (TR-EL) method to measure the response time of LED in our experiments. In addition, typical diode has optical beam induced current (OBIC) characteristic in its depletion region. Combining upon physical reaction we can compare TR-EL and OBIC in the same LED. We are using the high frequency function generator, pulsed laser with high repetition rate, laser scanning confocal microscopy and a high frequency phase sensitive lock-in loop to achieve temporal resolution. The response time of LED can be measured in two different physical characteristic.