The lifetime of light-emitting diodes (LED) becomes a more important concern because of the increasing application of LED in the field of traffic light, solid-state light and color displays[1]. A life time test of a l...The lifetime of light-emitting diodes (LED) becomes a more important concern because of the increasing application of LED in the field of traffic light, solid-state light and color displays[1]. A life time test of a light source usually requires several thousand hours to ensure the successful application of LED in higher reliability and performance.展开更多
In the present work, the LED chip was irradiated by using 59.6 MeV N ions in a terminal chamber of theSector-focused cyclotron (SFC) in the National Labortary of Heavy-ion Accelerators in Lanzhou. The 63 MeV Nions pen...In the present work, the LED chip was irradiated by using 59.6 MeV N ions in a terminal chamber of theSector-focused cyclotron (SFC) in the National Labortary of Heavy-ion Accelerators in Lanzhou. The 63 MeV Nions penetrated through a gold foil and scattered in a large area. The energy of ion was reduced to 59.6 MeV afterscattering of the gold foil. The LED was provided by the Semiconductor Lighting Center in Institute of Semiconductorin Beijing. The luminences of the LED before/after irradiation were tested through a integrating sphere inSemiconductor Lighting Center in Institute of Semiconductor in Beijing. The luminance was tested under a currentof 350 mA. Fig. 1 shows the relationship between the luminences and the irradiation fluences. The irradiation led展开更多
文摘The lifetime of light-emitting diodes (LED) becomes a more important concern because of the increasing application of LED in the field of traffic light, solid-state light and color displays[1]. A life time test of a light source usually requires several thousand hours to ensure the successful application of LED in higher reliability and performance.
文摘In the present work, the LED chip was irradiated by using 59.6 MeV N ions in a terminal chamber of theSector-focused cyclotron (SFC) in the National Labortary of Heavy-ion Accelerators in Lanzhou. The 63 MeV Nions penetrated through a gold foil and scattered in a large area. The energy of ion was reduced to 59.6 MeV afterscattering of the gold foil. The LED was provided by the Semiconductor Lighting Center in Institute of Semiconductorin Beijing. The luminences of the LED before/after irradiation were tested through a integrating sphere inSemiconductor Lighting Center in Institute of Semiconductor in Beijing. The luminance was tested under a currentof 350 mA. Fig. 1 shows the relationship between the luminences and the irradiation fluences. The irradiation led
