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- W2558351798 startingPage "1600782" @default.
- W2558351798 abstract "We investigated effects of V-pits embedded InGaN/GaN superlattices (SL) on optical and electrical properties of high power green LEDs by changing the number of SL period and SL growth temperature. Surface morphology of V-pits embedded InGaN/GaN SL with various periods and growth temperatures was evaluated by using atomic force microscopy (AFM). It was found that density and size of V-pit increase with decreasing SL growth temperature and increasing SL periods. Experimental studies using scanning electron microscopy (SEM) equipped with cathodoluminescence (CL) indicated that SL with larger V-pits appear to be more effective in suppressing the lateral diffusion of carriers into threading dislocations (TD). Compared to c-plane quantum wells, narrower quantum wells on the V-pit sidewall were clearly observed by performing high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). The external quantum efficiency (EQE) and the efficiency droop of green LEDs grown on underlying SL with larger V-pits are improved at high injection current regime, which is attributed to a more efficient hole injection into multiple quantum well, and also to a higher V-pit potential barrier height that could more effectively suppress the lateral diffusion of carriers into non-radiative recombination centers of TDs." @default.
- W2558351798 created "2016-12-08" @default.
- W2558351798 creator A5047416339 @default.
- W2558351798 creator A5072774443 @default.
- W2558351798 date "2016-11-30" @default.
- W2558351798 modified "2023-10-14" @default.
- W2558351798 title "Effect of V-pits embedded InGaN/GaN superlattices on optical and electrical properties of GaN-based green light-emitting diodes" @default.
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- W2558351798 doi "https://doi.org/10.1002/pssa.201600782" @default.
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