Author:
Esteves D. M.,Rodrigues A. L.,Alves L. C.,Alves E.,Dias M. I.,Jia Z.,Mu W.,Lorenz K.,Peres M.
Abstract
AbstractIon-beam-induced luminescence (IBIL) measurements were performed in Cr-doped β-Ga2O3 using both protons and helium ions, showing a strong enhancement of the Cr3+ luminescence upon ion irradiation. Theoretical modelling of the IBIL intensity curves as a function of the fluence allowed estimating the effective cross-sections associated with the defect-induced IBIL enhancement and quenching processes. The results suggest that sensitizing the Cr3+ luminescence is more efficient for H+ than for He+ irradiation. Thermoluminescence (TL) studies were performed in the pristine sample, with no TL signal being observed in the spectral region corresponding to the Cr3+ emission. In agreement with the IBIL study, upon ion irradiation (with either protons or helium ions), this TL emission is activated. Moreover, it can be quenched by annealing at 923 K for 10 s, thus revealing the role played by the defects induced by the irradiation. These results show that the irradiation-induced defects play a major role in the activation of the Cr3+ luminescence, a fact that can be exploited for radiation sensing and dosimetry.
Funder
Fundação para a Ciência e a Tecnologia
Horizon 2020
Publisher
Springer Science and Business Media LLC
Reference49 articles.
1. Stepanov, S. I., Nikolaev, V. I., Bougrov, V. E. & Romanov, A. E. Gallium Oxide: Properties and applications – a review. Rev. Adv. Mater. Sci. 4, 63 (2016).
2. Pearton, S. J. et al. A review of Ga2O3 materials, processing, and devices. Appl. Phys. Rev 5, 11301 (2018).
3. Higashiwaki, M. & Fujita, S. (eds) Gallium Oxide: Materials Properties, Crystal Growth, and Devices (Springer International Publishing, 2020).
4. Orita, M., Ohta, H., Hirano, M. & Hosono, H. Deep-ultraviolet transparent conductive β-Ga2O3 thin films. Appl. Phys. Lett. 77, 4166 (2000).
5. Chikoidze, E. et al. P-type β-gallium oxide: A new perspective for power and optoelectronic devices. Mater. Today Phys. 3, 118 (2017).
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献