Numerical investigation on the device performance of electron blocking layer free AlInN nanowire deep ultraviolet light-emitting diodes
| Autor: | Hoang Duy Nguyen, Tan Thi Pham, Ha Quoc Thang Bui, Ravi Teja Velpula, Trupti Ranjan Lenka, Barsha Jain, Van Thang Le, Hieu Pham Trung Nguyen |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Nanowire 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials law.invention 010309 optics Semiconductor law 0103 physical sciences Optoelectronics Quantum efficiency Spontaneous emission 0210 nano-technology business Current density Quantum well Light-emitting diode Diode |
| Zdroj: | Optical Materials Express. 10:472 |
| ISSN: | 2159-3930 |
| DOI: | 10.1364/ome.380409 |
| Popis: | We report on the illustration of the first electron blocking layer (EBL) free AlInN nanowire light-emitting diodes (LEDs) operating in the deep ultraviolet (DUV) wavelength region (sub-250 nm). We have systematically analyzed the results using APSYS software and compared with simulated AlGaN nanowire DUV LEDs. From the simulation results, significant efficiency droop was observed in AlGaN based devices, attributed to the significant electron leakage. However, compared to AlGaN nanowire DUV LEDs at similar emission wavelength, the proposed single quantum well (SQW) AlInN based light-emitters offer higher internal quantum efficiency without droop up to current density of 1500 A/cm2 and high output optical power. Moreover, we find that transverse magnetic polarized emission is ∼ 5 orders stronger than transverse electric polarized emission at 238 nm wavelength. Further research shows that the performance of the AlInN DUV nanowire LEDs decreases with multiple QWs in the active region due to the presence of the non-uniform carrier distribution in the active region. This study provides important insights on the design of new type of high performance AlInN nanowire DUV LEDs, by replacing currently used AlGaN semiconductors. |
| Databáze: | OpenAIRE |
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