Intracenter Radiative Transitions at Tantalum Impurity Centers in Cadmium Telluride
- 作者: Ushakov V.1, Aminev D.1, Krivobok V.1
-
隶属关系:
- Lebedev Physical Institute, Russian Academy of Sciences
- 期: 卷 52, 编号 13 (2018)
- 页面: 1686-1690
- 栏目: Spectroscopy, Interaction with Radiation
- URL: https://journals.rcsi.science/1063-7826/article/view/204871
- DOI: https://doi.org/10.1134/S1063782618130201
- ID: 204871
如何引用文章
详细
Luminescence spectra of Ta impurity centers in CdTe are studied for the first time. It is found that, as the 3d (Ta) electron system of centers is considered instead of the 3d (V) system, a substantial change in the characteristics of impurity-related emission is observed. Electron transitions are identified in accordance with the Tanabe–Sugano diagrams of crystal-field theory. It is established that radiative transitions occur within isolated \({\text{Ta}}_{{{\text{Cd}}}}^{{3 + }}\) centers, between levels with different spins. Temperature broadening of the zero-phonon line of tantalum is induced by the interaction of d electrons of the center with TA phonons of the crystal lattice. However, in interpreting the data on the temperature shift of the line, it is essential to take into account the hybridization of local impurity states and band states. Temperature quenching of the luminescence signal occurs with activation energies of 60 and 160 meV. The radiative lifetime of centers in CdTe:Ta is 1.5 μs.
作者简介
V. Ushakov
Lebedev Physical Institute, Russian Academy of Sciences
编辑信件的主要联系方式.
Email: ushakov@lebedev.ru
俄罗斯联邦, Moscow, 119991
D. Aminev
Lebedev Physical Institute, Russian Academy of Sciences
Email: ushakov@lebedev.ru
俄罗斯联邦, Moscow, 119991
V. Krivobok
Lebedev Physical Institute, Russian Academy of Sciences
Email: ushakov@lebedev.ru
俄罗斯联邦, Moscow, 119991