INFLUENCE OF ELECTRON IRRADIATION ON ELECTRICAL AND OPTICAL CHARACTERISTICS OF (LIGHT EMITTING DIODES) LEDS.
Abstract
The presence of light emitting diodes (LEDs) is being felt increasingly in day-to-day life. One of the major attractions of LEDs is their long lifetime. Hence a systematic study would be useful to understand level of performance, degradation due to various external factors such as temperature, high energy particle irradiation etc. The purpose of this study is to test the radiation hardness, a measure of LEDs ability to operate near maximum efficiency after being irradiated with electrons. A systematic study has been made to understand the effect of electron irradiation on LEDs with and without encapsulation (LED chips) of primary colours. The samples were irradiated by 8 MeV electrons with different radiation dosages from 500 Gy to 160 KGy.