| Conţinutul numărului revistei |
| Articolul precedent |
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 SM ISO690:2012URSACHI, Veaceslav, RICCI, P.C., TIGINYANU, Ion, ANEDDA, Alberto, SYRBU, Nicolae, TEZLEVAN, Victor. Excitation and temperature tuned photoluminescence in HgGa2S4 single crystals. In: Journal of Physics and Chemistry of Solids, 2002, vol. 63, pp. 1823-1828. ISSN 0022-3697. DOI: https://doi.org/10.1016/S0022-3697(02)00002-1 |
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  Journal of Physics and Chemistry of Solids |
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| Volumul 63 / 2002 / ISSN 0022-3697 /ISSNe 0022-3697 | ||||||
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| DOI:https://doi.org/10.1016/S0022-3697(02)00002-1 | ||||||
| Pag. 1823-1828 | ||||||
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Mercury thiogallate single crystals are shown to exhibit bright photoluminescence (PL) tunable in a wide spectral range from green to red when changing the excitation power density, wavelength and sample temperature. Taking into account the excitation and temperature dependencies of the PL characteristics, a model accounting for the radiative electron transitions in HgGa2S4 is proposed. The values of the energy gap extrapolated to 0 K and of the linear and quadratic temperature coefficients of the energy gap [Eg(0) = 2.997 eV; a = -1.34 × 10-4 eV K-1; b = -1.29 × 10-6 eV K-2] were deduced from PL excitation experiments. |
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| Cuvinte-cheie Crystal growth, Electron transitions, Energy gap, Mercury compounds, photoluminescence, Semiconductor materials |
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