Thermoluminescence response as a function of irradiation temperature

Lu, June Kuen; Tung, C. J.; Hsu, Powen

doi:10.1080/01422448308209663

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The TL glow curves and the T M - T STOP plots (Figure ) indicate the presence of at least three glow peaks, with positions that remain approximately the same before and after the proton irradiation, suggesting that the traps are similar in both cases. A work by Islam et al, using a heating rate of 1 K/s, reports the existence of two glow peaks in Mg-doped Ga 2 O 3 : a very intense peak centered at ∼383 K and a less intense peak centered at ∼473 K. However, their excitation was performed using UV light at 83 K, which can severely alter the shape of the glow curves . On the other hand, Luchechko et al used the same heating rate of 0.1 K/s to study Mg-doped Ga 2 O 3 , with the excitation performed using X-rays at room temperature.…”

Section: Resultsmentioning

confidence: 99%

“…A work by Islam et al, 16 using a heating rate of 1 K/s, reports the existence of two glow peaks in Mg-doped Ga 2 O 3 : a very intense peak centered at ∼383 K and a less intense peak centered at ∼473 K. However, their excitation was performed using UV light at 83 K, which can severely alter the shape of the glow curves. 33 On the other hand, Luchechko et al 24 used the same heating rate of 0.1 K/s to study Mg-doped Ga 2 O 3 , with the excitation performed using X-rays at room temperature. The glow curve obtained in the previously mentioned work was deconvoluted on four elementary peaks: two very low intensity peaks centered at 280 and 320 K, a more intense peak centered at 430 K, and two very intense peaks at 354 and 385 K, which are overlapped.…”

Section: Resultsmentioning

confidence: 99%

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Thermoluminescence Studies of Proton-Irradiated Cr-, Mg-Codoped β-Ga₂O₃

Magalhães Esteves,

Rodrigues,

Dias

et al. 2023

ACS Omega

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Chromium-doped Ga 2 O 3 , with intense Cr 3+ -related red-infrared light emission, is a promising semiconductor material for optical sensors. This work constitutes a comprehensive study of the thermoluminescence properties of Cr-, Mg-codoped β-Ga 2 O 3 single crystals, both prior to and after proton irradiation. The thermoluminescence investigation includes a thorough analysis of measurements with different β − irradiation doses used to populate the trap levels, with preheating steps to disentangle overlapping peaks ( T M - T STOP and initial rise methods) and finally by computationally fitting to a theoretical expression. At least three traps with activation energies of 0.84, 1.0, and 1.1 eV were detected. By comparison with literature reports, they can be assigned to different defect complexes involving oxygen vacancies and/or common contaminants/dopants. Interestingly, the thermoluminescence signal is enhanced by the proton irradiation while the type of traps is maintained. Finally, the pristine glow curve was recovered on the irradiated samples after an annealing step at 923 K for 10 s. These results contribute to a better understanding of the defect levels in Cr-, Mg-codoped β-Ga 2 O 3 and show that electrons released from these traps lead to Cr 3+ -related light emission that can be exploited in dosimetry applications.

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Section: Resultsmentioning

confidence: 99%