科研之友
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摘要
Transmission, photoluminescence, and reflectance spectra of TlInS2 single crystals grown by the Bridgman-Stockbarger method were measured at 4.2 K near the fundamental absorption edge. Narrow lines at similar to 2.5535 and similar to 2.5694 eV were observed in the transmission spectrum and assigned to ground and excited free-exciton states, respectively. The free-exciton binding energy and band-gap energy Eg were found to be similar to 21.2 meV and similar to 2.5747 eV, respectively. A recombination mechanism was proposed for the TlInS2 near-band-edge and deep luminescence.
- 出版日期2012-7
