High temperature characterization of GaN-based photodetectors
| Autor: | Mauro Lomascolo, R. Cingolani, B. Potì, Pomarico Anna Angela, M.C. Frassanito, Maria Teresa Todaro, Adriana Passaseo, M. De Vittorio |
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| Přispěvatelé: | DE VITTORIO, Massimo, B., Poti', M. T., Todaro, M. C., Frassanito, A., Pomarico, A., Passaseo, M., Lomascolo, Cingolani, Roberto |
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Photocurrent
Materials science business.industry Metals and Alloys Photodetector Heterojunction Chemical vapor deposition Sputter deposition Condensed Matter Physics Epitaxy Surfaces Coatings and Films Electronic Optical and Magnetic Materials Optoelectronics Metalorganic vapour phase epitaxy Electrical and Electronic Engineering business Instrumentation Molecular beam epitaxy |
| Zdroj: | Sensors and actuators. A, Physical 113 (2004): 329–333. doi:10.1016/j.sna.2004.04.016 info:cnr-pdr/source/autori:De Vittorio M, Poti B, Todaro MT, Frassanito MC, Pomarico A, Passaseo A, Lomascolo M, Cingolani R/titolo:High temperature characterization of GaN-based photodetectors/doi:10.1016%2Fj.sna.2004.04.016/rivista:Sensors and actuators. A, Physical (Print)/anno:2004/pagina_da:329/pagina_a:333/intervallo_pagine:329–333/volume:113 |
| Popis: | In this work we report on the high temperature characterization of two different interdigitated metal–semiconductor–metal (MSM) GaN-based photodetectors. The active material of the two MSM devices consists of bulk GaN grown by metal organic chemical vapor deposition (MOCVD), and of an AlGaN/GaN heterostructure grown by molecular beam epitaxy/magnetron sputtering epitaxy (MBE/MSE) system. Some of the trapping mechanisms which are at the origin of the persistent photocurrent (PPC) effects in GaN-based devices have been studied. The analysis of the decay time as a function of the temperature shows that in both devices the GaN excitonic resonances provide the most important contribution to the PPC on the millisecond time scale at low temperature. The densities of the trap centers involved in the PPC were obtained in both samples by measuring the photocurrent as a function of optical power sweeped in the upward and downward direction. |
| Databáze: | OpenAIRE |
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