Light emitting enhancement and angle-resolved property of surface textured GaN-based vertical LED
| Autor: | Zhe Liu, Baoli Liu, Chuanrui Zhu, Yujin Wang, Haifang Yang, Changzhi Gu, Xiangang Xu, Junjie Li, Yan Shen |
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| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Materials science business.industry Resonance 02 engineering and technology Surface finish 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Atomic and Molecular Physics and Optics Spectral line law.invention Light intensity Optics law 0103 physical sciences Optoelectronics Reactive-ion etching Inductively coupled plasma 0210 nano-technology business Light-emitting diode |
| Zdroj: | Journal of Optics. 45:81-86 |
| ISSN: | 0974-6900 0972-8821 |
| DOI: | 10.1007/s12596-015-0304-3 |
| Popis: | The performances of GaN-based vertical light emitting diodes with surface texture of GaN cones were studied. The cones were fabricated by inductively coupled plasma reactive ion etching with Cr mask, which can enhance the light intensity by about 95 % at injection current of 350 mA. Angle and wavelength-resolved far-field spectra were measured, and the maximum light enhancement lies at about ±15°–50° respect to normal direction. This is because of the successive reflection of light by the sidewall of cones, which can be concluded from the far-field pattern that the Fabry-Perot like resonance of patterned LED disappears compared to the original device. The polarization property of patterned LED was also analyzed, which can explain the increasing of enhancement ratio with injection current. |
| Databáze: | OpenAIRE |
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