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- W2991157313 abstract "Low-temperature GaN cap layer was designed after quantum wells for the V-pits contained InGaN-based green light-emitting diodes (LEDs). It is found that the LEDs performances are greatly improved with thicker cap layer. The indium distribution in InGaN/GaN multiple quantum wells (MQWs) becomes more homogeneous. The quality of interface between quantum well and quantum barrier (QB) is promoted, and the carrier confinement effect is enhanced. Thereby the external quantum efficiency (EQE) increases at high current density. However, the sample with a relative thicker cap layer exhibits the lower EQE at low current density, which is attributed to the more defects at the upper interface of QWs, and the increased probability of carriers meeting at these non-radiative recombination centers. Meanwhile, only the major emission peak emitted from c-plane MQWs can be observed in the electroluminescence spectrum of 100 K, and other emission peaks are hardly visible, which indicates that the sample with thicker cap has better carrier transport performance." @default.
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- W2991157313 date "2020-03-19" @default.
- W2991157313 modified "2023-10-17" @default.
- W2991157313 title "Effect of low-temperature GaN cap layer thickness on the optoelectronic performance of InGaN green LEDs with V-shape pits" @default.
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- W2991157313 doi "https://doi.org/10.1088/1361-6641/ab5da5" @default.
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