Luminescence of direct-and indirect-gap electron-hole plasma in TlBr |
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| Institution: | 1. School of Mathematics and Physics, Anhui University of Technology, Maanshan, Anhui, 243002, PR China;2. Science and Technology on Applied Physical Chemistry Laboratory, Shanxi Applied Physics and Chemistry Research Institute, Xi′an, 710061, China;3. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China;4. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, 150001, PR China;1. Department of Gynecology and Obstetrics, Faculty of Medicine, Masaryk University, Brno, Czech Republic;2. Gynecologic Oncology Center, Department of Gynecology and Obstetrics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic;3. Department of Pathology, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic;4. Institute of Biostatistics and Analyses, Masaryk University, Brno, Czech Republic;1. Department of Physics, Kyungpook National University, Daegu 41566, Korea;2. Department of Physics, Abdul Wali Khan University, Mardan 23200, Pakistan;3. Department of Radiological Science, Cheongju University, Cheongju 41566, Korea;1. Department of Physics, Fergusson College, Savitribai Phule Pune University, Pune 411004, India;2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;3. Health Physics Division, BARC, Mumbai 400085, Maharashtra, India;4. Ex-BARC Scientist, B-6, Ameya Co-op. Housing Society, Sector 9-A, Vashi, Navi Mumbai 400703, India;5. Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India;6. Department of Physics, Savitribai Phule Pune University, Pune 411007, India;1. Museo Nacional de Ciencias Naturales, CSIC, Jose Gutierrez Abascal 2, Madrid E-28006, Spain;2. School of Science and Technology, University of Sussex, Brighton BN1 9QH, United Kingdom;3. Instituto de Química-Física Rocasolano, CSIC, Calle Serrano 119, Madrid E-28006, Spain |
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| Abstract: | Luminescence of TlBr crystals highly excited by a nanosecond pulsed-dye laser (3.4 eV) at the bath temperature ∼ 8.5 K was studied. Two emission lines labeled A (∼ 2.98 eV) and B (∼ 2.62 eV) were found, which show typical behavior of the electron-hole plasma recombination radiation. The A-line is assigned to the recombination of e-h pairs in the direct gap (X+6−X-3) and the B-line to the simultaneous recombination in the indirect gap (X+6−R-6). Condensation of carriers into an electron-hole liquid was not observed. |
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