Photoluminescence and X-ray luminescence of Pb0.30Cd0.70I2 solid solutions. Comparative study |
| |
| Affiliation: | 1. Institute of Physics of NASU, Prospect Nauky 46, Kyiv 03028, Ukraine;2. Excillum AB, Torshamnsgatan 35, 164 40 Kista, Sweden;3. Taras Shevchenko National University of Kyiv, 64 Volodymyrs''ka Str., 01601 Kyiv, Ukraine;4. Lviv National University, 8 Kyrylo and Mefodiy Str., 29005 Lviv, Ukraine;1. Department of Physics, Botswana International University of Science and Technology, P/Bag 16, Palapye, Botswana;2. Department of Physics, University of Botswana, P/Bag UB 0022, Gaborone, Botswana;1. Institute of Physics, Poznan University of Technology, ul. Piotrowo 3, 60-965 Poznań, Poland;2. Centre for Advanced Technologies, Adam Mickiewicz University, ul. Umultowska 89C, 61-614 Poznań, Poland;3. Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179 Poznań, Poland;4. Institute of Electronics Materials Technology, ul. Wólczynska 13, 01-919 Warszawa, Poland;1. Escuela Superior de Física y Matemáticas-Instituto Politécnico Nacional (IPN), C.P. 07738, CDMX, Mexico;2. Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico;3. Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Sant Adrià del Besòs-Barcelona, Spain;4. Centro de Investigaciones en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Morelos, C.P.62209, Mexico;5. CICATA–IPN, Altamira, Km. 14.5 carretera Tampico-puerto Altamira, Altamira, Tamaulipas, C.P. 89600, Mexico |
| |
| Abstract: | The nature and relative contributions (RCs) of various radiative recombination processes to the photoluminescence (PL) spectra for bulk nanostructured Pb0.30Cd0.70I2 solid solutions have been established at different temperatures. The analysis indicates that the PL is caused by free, bound and self-trapped excitons as well as by donor-acceptor pairs emission with the participation of shallow and deep acceptor centers. It was shown that X-ray luminescence (XRL) spectra are also determined by these recombination processes. However, their RC and the temperature evolution are considerably different. Besides, XRL spectra contain an intense long-wavelength band associated with the emission of many LO-phonons. It was shown that the deep luminescence surface states, associated with the self-trapped excitons and deep intrinsic defects, mainly determine the intensity of XRL spectra both at 80 K and room temperature. The results obtained open the way to the optimization of the scintillator properties of the investigated materials. |
| |
| Keywords: | Semiconductor scintillation nanomaterials Nanoclusters Luminescence Excitons Deep surface states |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
