Photoacoustic measurement of internal quantum efficiency and observation of the exciton effect in GaSe with photoacoustic phase spectra
Abstract
We studied the room temperature photoacoustic spectra of GaSe single crystals in the vicinity of the energy gap. Exciton formation was observed in both amplitude and phase spectra. The thermal source that arises in the illuminated sample because of optical absorption without free-carrier generation was incorporated in the heat diffusion equation in order to extend the theoretical approach of photoacoustic signal generation. We calculated the optical absorption coefficient, which shows the exciton formation, and the electron-hole generation quantum efficiency eta(G) using an extended model from the phase and amplitude photoacoustic spectra, respectively. (C) 1997 Optical Society of America
Keywords:
photoacoustic spectroscopy / GaSe / exciton effect / internal quantum efficiencySource:
Applied Optics, 1997, 36, 3, 648-654
DOI: 10.1364/AO.36.000648
ISSN: 0003-6935
PubMed: 18250722
WoS: A1997WD52400019
Scopus: 2-s2.0-5644266452
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Institution/Community
VinčaTY - JOUR AU - Ristovski, Zoran AU - Dramićanin, Miroslav PY - 1997 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2048 AB - We studied the room temperature photoacoustic spectra of GaSe single crystals in the vicinity of the energy gap. Exciton formation was observed in both amplitude and phase spectra. The thermal source that arises in the illuminated sample because of optical absorption without free-carrier generation was incorporated in the heat diffusion equation in order to extend the theoretical approach of photoacoustic signal generation. We calculated the optical absorption coefficient, which shows the exciton formation, and the electron-hole generation quantum efficiency eta(G) using an extended model from the phase and amplitude photoacoustic spectra, respectively. (C) 1997 Optical Society of America T2 - Applied Optics T1 - Photoacoustic measurement of internal quantum efficiency and observation of the exciton effect in GaSe with photoacoustic phase spectra VL - 36 IS - 3 SP - 648 EP - 654 DO - 10.1364/AO.36.000648 ER -
@article{ author = "Ristovski, Zoran and Dramićanin, Miroslav", year = "1997", abstract = "We studied the room temperature photoacoustic spectra of GaSe single crystals in the vicinity of the energy gap. Exciton formation was observed in both amplitude and phase spectra. The thermal source that arises in the illuminated sample because of optical absorption without free-carrier generation was incorporated in the heat diffusion equation in order to extend the theoretical approach of photoacoustic signal generation. We calculated the optical absorption coefficient, which shows the exciton formation, and the electron-hole generation quantum efficiency eta(G) using an extended model from the phase and amplitude photoacoustic spectra, respectively. (C) 1997 Optical Society of America", journal = "Applied Optics", title = "Photoacoustic measurement of internal quantum efficiency and observation of the exciton effect in GaSe with photoacoustic phase spectra", volume = "36", number = "3", pages = "648-654", doi = "10.1364/AO.36.000648" }
Ristovski, Z.,& Dramićanin, M.. (1997). Photoacoustic measurement of internal quantum efficiency and observation of the exciton effect in GaSe with photoacoustic phase spectra. in Applied Optics, 36(3), 648-654. https://doi.org/10.1364/AO.36.000648
Ristovski Z, Dramićanin M. Photoacoustic measurement of internal quantum efficiency and observation of the exciton effect in GaSe with photoacoustic phase spectra. in Applied Optics. 1997;36(3):648-654. doi:10.1364/AO.36.000648 .
Ristovski, Zoran, Dramićanin, Miroslav, "Photoacoustic measurement of internal quantum efficiency and observation of the exciton effect in GaSe with photoacoustic phase spectra" in Applied Optics, 36, no. 3 (1997):648-654, https://doi.org/10.1364/AO.36.000648 . .