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In situ luminescence measurement of 6H-SiC at low temperature |
Meng-Lin Qiu(仇猛淋)1, Peng Yin(殷鹏)1, Guang-Fu Wang(王广甫)1,2, Ji-Gao Song(宋纪高)1, Chang-Wei Luo(罗长维)1, Ting-Shun Wang(王庭顺)1, Guo-Qiang Zhao(赵国强)1, Sha-Sha Lv(吕沙沙)1, Feng-Shou Zhang(张丰收)1,2, Bin Liao(廖斌)1 |
1 Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China; 2 Beijing Radiation Center, Beijing 100875, China |
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Abstract To understand the evolution of defects in SiC during irradiation and the influence of temperature, in situ luminescence measurements of 6H-SiC crystal samples were carried out by ion beam induced luminescence (IBIL) measurement under 2 MeV H+ at 100 K, 150 K, 200 K, 250 K, and 300 K. A wide band (400-1000 nm) was found in the spectra at all temperatures, and the intensity of the IBIL spectra was highest at 150 K among the five temperatures. A small peak from 400 nm to 500 nm was only observed at 100 K, related with the D1 defect as a donor-acceptor pair (D-A) recombination. For further understanding the luminescent centers and their evolution, the orange band (1.79 eV) and the green band (2.14 eV) in the energy spectrum were analyzed by Gaussian decomposition, maybe due to the donor-deep defect/conduction band-deep defect transitions and Ti related bound excition, respectively. Finally, a single exponential fit showed that when the temperature exceeded 150 K, the two luminescence centers' resistance to radiation was reduced.
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Received: 31 December 2019
Revised: 17 February 2020
Accepted manuscript online:
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PACS:
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61.82.Fk
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(Semiconductors)
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61.80.Jh
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(Ion radiation effects)
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61.72.J-
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(Point defects and defect clusters)
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Fund: Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 11905010), the Fundamental Research Funds for the Central Universities, China (Grant No. 2018NTST04), the China Postdoctoral Science Foundation (Grant No. 2019M650526), and Guangdong Province Key Area R&D Program, China (Grant No. 2019B090909002). |
Corresponding Authors:
Guang-Fu Wang
E-mail: 88088@bnu.edu.cn
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Cite this article:
Meng-Lin Qiu(仇猛淋), Peng Yin(殷鹏), Guang-Fu Wang(王广甫), Ji-Gao Song(宋纪高), Chang-Wei Luo(罗长维), Ting-Shun Wang(王庭顺), Guo-Qiang Zhao(赵国强), Sha-Sha Lv(吕沙沙), Feng-Shou Zhang(张丰收), Bin Liao(廖斌) In situ luminescence measurement of 6H-SiC at low temperature 2020 Chin. Phys. B 29 046106
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