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• W1956554814 endingPage "265102" @default.
• W1956554814 startingPage "265102" @default.
• W1956554814 abstract "Thermal management has become a crucial area for further development of high-power light-emitting didoes (LEDs) due to the high operating current densities that are required and result in additional joule heating. This increased joule heating negatively affects the performance of the LEDs since it greatly decreases both the optical performance and the lifetime. To circumvent this problem, a reduced graphene oxide (rGO) layer can be inserted to act as a heat spreader. In this study, current–voltage and light-output-current measurements are systematically performed at different temperatures from 30 to 190 °C to investigate the effect that the embedded rGO pattern has on the device performance. At a high temperature and high operating current, the junction temperature (Tj) is 23% lower and the external quantum efficiency (EQE) is 24% higher for the rGO embedded LEDs relative to those of conventional LEDs. In addition, the thermal activation energy of the rGO embedded LEDs exhibits a 30% enhancement as a function of the temperature at a bias of −5 V. This indicates that the rGO pattern plays an essential role in decreasing the junction temperature and results in a favorable performance in terms of the temperature of the high power GaN-based LED junction." @default.
• W1956554814 created "2016-06-24" @default.
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• W1956554814 date "2015-06-03" @default.
• W1956554814 modified "2023-10-17" @default.
• W1956554814 title "Reduced junction temperature and enhanced performance of high power light-emitting diodes using reduced graphene oxide pattern" @default.
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• W1956554814 doi "https://doi.org/10.1088/0022-3727/48/26/265102" @default.
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