Academic Journal
Relationship between Ce3+ 5d1 level, conduction-band bottom, and shallow electron trap level in Gd3Ga5O12:Ce and Gd3Al1Ga4O12:Ce crystals studied via pump-probe absorption spectroscopy
| العنوان: | Relationship between Ce3+ 5d1 level, conduction-band bottom, and shallow electron trap level in Gd3Ga5O12:Ce and Gd3Al1Ga4O12:Ce crystals studied via pump-probe absorption spectroscopy |
|---|---|
| المؤلفون: | Mamoru Kitaura, Heishun Zen, Shinta Watanabe, Hirokazu Masai, Kei Kamada, Kyoung-Jin Kim, Akira Yoshikawa, Jumpei Ueda |
| المصدر: | Optical Materials: X, Vol 25, Iss , Pp 100398- (2025) |
| بيانات النشر: | Elsevier, 2025. |
| سنة النشر: | 2025 |
| المجموعة: | LCC:Applied optics. Photonics LCC:Optics. Light |
| مصطلحات موضوعية: | Ce3+ ion, Inorganic phosphor, Pump-probe absorption spectroscopy, Free carrier plasma, Multicomponent oxides, Thermally stimulated luminescence, Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467 |
| الوصف: | Ce3+-doped compounds are typically the preferred materials for the development of inorganic phosphors for white LEDs, displays, and scintillators. In this study, pump-probe absorption spectroscopy was performed for Gd3Ga5O12:Ce and Gd3Al1Ga4O12:Ce crystals using ultraviolet (UV) and visible (VIS) pump light, and infrared (IR) probe light. A change in the IR-absorption was observed owing to the generation of free carrier plasma via photoexcitation. Through a simple analysis, the excitation spectra of this change determined the energy at the bottom of the conduction band relative to that at the Ce3+ 4f level. The transient response of the IR-absorption change suggested different relaxation processes for excited electrons in Gd3Ga5O12:Ce and Gd3Al1Ga4O12:Ce. Analysis of the thermally stimulated luminescence (TSL) glow curve determined the trap depth of the electrons in Gd3Al1Ga4O12:Ce. Based on positron annihilation lifetime spectroscopy (PALS), the generation of electron traps was linked to the introduction of vacancy complexes or vacancy aggregates with a negative charge, namely nonstoichiometric compositions. This helps achieve high-quality Ce3+-doped multicomponent oxides. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2590-1478 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2590147824001104; https://doaj.org/toc/2590-1478 |
| DOI: | 10.1016/j.omx.2024.100398 |
| URL الوصول: | https://doaj.org/article/73c6e1b536514089b548270e2abf26fc |
| رقم الانضمام: | edsdoj.73c6e1b536514089b548270e2abf26fc |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 25901478 |
|---|---|
| DOI: | 10.1016/j.omx.2024.100398 |