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Journal Articles

Improved phosphorus doping in ZnTe by molecular beam epitaxy under alternating source supply

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Muhamad Mustofa, Katsuhiko Saito, Qixin Guo, Tooru Tanaka
Journal: Journal of Applied Physics
J. Appl. Phys. 134, 193101 (2023)
https://doi.org/10.1063/5.0178803
Published: November 2023
View articletitled, Improved phosphorus doping in ZnTe by molecular beam epitaxy under alternating source supply
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Journal Articles

Pulsed laser deposition growth of ultra-wide bandgap GeO2 film and its optical properties

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Gaofeng Deng, Katsuhiko Saito, Tooru Tanaka, Makoto Arita, Qixin Guo
Journal: Applied Physics Letters
Appl. Phys. Lett. 119, 182101 (2021)
https://doi.org/10.1063/5.0071918
Published: November 2021
View articletitled, Pulsed laser deposition growth of ultra-wide bandgap GeO2 film and its optical properties
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Journal Articles

Strategy toward white LEDs based on vertically integrated rare earth doped Ga2O3 films

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Yafei Huang, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
Journal: Applied Physics Letters
Appl. Phys. Lett. 119, 062107 (2021)
https://doi.org/10.1063/5.0060066
Published: August 2021
View articletitled, Strategy toward white LEDs based on vertically integrated rare earth doped Ga2O3 films
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Journal Articles

Reduction of MOS interfacial states between β -Ga2O3 and Al2O3 insulator by self-reaction etching with Ga flux

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Boyuan Feng, Tao He, Gaohang He, Xiaodong Zhang, Ying Wu, Xiao Chen, Zhengcheng Li, Xinping Zhang, Zhitai Jia, Gang Niu, Qixin Guo, Zhongming Zeng, Sunan Ding
Journal: Applied Physics Letters
Appl. Phys. Lett. 118, 181602 (2021)
https://doi.org/10.1063/5.0048311
Published: May 2021
View articletitled, Reduction of MOS interfacial states between β -Ga2O3 and Al2O3 insulator by self-reaction etching with Ga flux
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Includes: Supplementary data
Journal Articles

Epitaxial growth of (AlxGa1−x)2O3 thin films on sapphire substrates by plasma assisted pulsed laser deposition

Open Access
Zewei Chen, Makoto Arita, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
Journal: AIP Advances
AIP Advances 11, 035319 (2021)
https://doi.org/10.1063/5.0046237
Published: March 2021
View articletitled, Epitaxial growth of (AlxGa1−x)2O3 thin films on sapphire substrates by plasma assisted pulsed laser deposition
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Journal Articles

Efficient temperature sensor based on green emissions from Er-doped β-Ga2O3 thin film

Open Access
Gaofeng Deng, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
Journal: AIP Advances
AIP Advances 10, 105227 (2020)
https://doi.org/10.1063/5.0020200
Published: October 2020
View articletitled, Efficient temperature sensor based on green emissions from Er-doped β-Ga2O3 thin film
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Journal Articles

Impacts of oxygen radical ambient on structural and optical properties of (AlGa)2O3 films deposited by pulsed laser deposition

Open Access
Fabi Zhang, Congyu Hu, Makoto Arita, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
Journal: AIP Advances
AIP Advances 10, 065125 (2020)
https://doi.org/10.1063/1.5140822
Published: June 2020
View articletitled, Impacts of oxygen radical ambient on structural and optical properties of (AlGa)2O3 films deposited by pulsed laser deposition
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Journal Articles

Effect of oxygen flow rate on properties of Cu4O3 thin films fabricated by radio frequency magnetron sputtering

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Md Abdul Majed Patwary, Chun Yuen Ho, Katsuhiko Saito, Qixin Guo, Kin Man Yu, Wladek Walukiewicz, Tooru Tanaka
Journal: Journal of Applied Physics
J. Appl. Phys. 127, 085302 (2020)
https://doi.org/10.1063/1.5144205
Published: February 2020
View articletitled, Effect of oxygen flow rate on properties of Cu4O3 thin films fabricated by radio frequency magnetron sputtering
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Journal Articles

Conductive transparent (InGa)2O3 film as host for rare earth Eu

Open Access
Fabi Zhang, Katsuhiko Saito, Tooru Tanaka, Xinqiang Wang, Qixin Guo
Journal: AIP Advances
AIP Advances 10, 025024 (2020)
https://doi.org/10.1063/1.5143777
Published: February 2020
View articletitled, Conductive transparent (InGa)2O3 film as host for rare earth Eu
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Journal Articles

Low temperature growth of Ga2O3 films on sapphire substrates by plasma assisted pulsed laser deposition

Open Access
Congyu Hu, Fabi Zhang, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
Journal: AIP Advances
AIP Advances 9, 085022 (2019)
https://doi.org/10.1063/1.5118700
Published: August 2019
View articletitled, Low temperature growth of Ga2O3 films on sapphire substrates by plasma assisted pulsed laser deposition
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Journal Articles

Cl-doping effect in ZnTe1-xOx highly mismatched alloys for intermediate band solar cells

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Tooru Tanaka, Kento Matsuo, Katsuhiko Saito, Qixin Guo, Takeshi Tayagaki, Kin Man Yu, Wladek Walukiewicz
Journal: Journal of Applied Physics
J. Appl. Phys. 125, 243109 (2019)
https://doi.org/10.1063/1.5092553
Published: June 2019
View articletitled, Cl-doping effect in ZnTe1-xOx highly mismatched alloys for intermediate band solar cells
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Journal Articles

Crystal and electronic structural changes during annealing in severely deformed Si containing metastable phases formed by high-pressure torsion

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Yoshifumi Ikoma, Bumsoo Chon, Terumasa Yamasaki, Kazutoshi Takahashi, Katsuhiko Saito, Qixin Guo, Zenji Horita
Journal: Applied Physics Letters
Appl. Phys. Lett. 113, 101904 (2018)
https://doi.org/10.1063/1.5038160
Published: September 2018
View articletitled, Crystal and electronic structural changes during annealing in severely deformed Si containing metastable phases formed by high-pressure torsion
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Journal Articles

Evolution of optical properties and band structure from amorphous to crystalline Ga2O3 films

Open Access
Fabi Zhang, Haiou Li, Yi-Tao Cui, Guo-Ling Li, Qixin Guo
Journal: AIP Advances
AIP Advances 8, 045112 (2018)
https://doi.org/10.1063/1.5021867
Published: April 2018
View articletitled, Evolution of optical properties and band structure from amorphous to crystalline Ga2O3 films
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Journal Articles

Defect induced visible-light-activated near-infrared emissions in Gd3−x−y−zYbxBiyErzGa5O12

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Liping Tong, Katsuhiko Saito, Qixin Guo, Han Zhou, Tongxiang Fan, Di Zhang
Journal: Journal of Applied Physics
J. Appl. Phys. 122, 173103 (2017)
https://doi.org/10.1063/1.5001974
Published: November 2017
View articletitled, Defect induced visible-light-activated near-infrared emissions in Gd3−x−y−zYbxBiyErzGa5O12
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Journal Articles

Band alignment of Ga2O3/Si heterojunction interface measured by X-ray photoelectron spectroscopy

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Zhengwei Chen, Kazuo Nishihagi, Xu Wang, Katsuhiko Saito, Tooru Tanaka, Mitsuhiro Nishio, Makoto Arita, Qixin Guo
Journal: Applied Physics Letters
Appl. Phys. Lett. 109, 102106 (2016)
https://doi.org/10.1063/1.4962538
Published: September 2016
View articletitled, Band alignment of Ga2O3/Si heterojunction interface measured by X-ray photoelectron spectroscopy
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Journal Articles

Toward controlling the carrier density of Si doped Ga2O3 films by pulsed laser deposition

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Fabi Zhang, Makoto Arita, Xu Wang, Zhengwei Chen, Katsuhiko Saito, Tooru Tanaka, Mitsuhiro Nishio, Teruaki Motooka, Qixin Guo
Journal: Applied Physics Letters
Appl. Phys. Lett. 109, 102105 (2016)
https://doi.org/10.1063/1.4962463
Published: September 2016
View articletitled, Toward controlling the carrier density of Si doped Ga2O3 films by pulsed laser deposition
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Journal Articles

Observation of low voltage driven green emission from erbium doped Ga2O3 light-emitting devices

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Zhengwei Chen, Xu Wang, Fabi Zhang, Shinji Noda, Katsuhiko Saito, Tooru Tanaka, Mitsuhiro Nishio, Makoto Arita, Qixin Guo
Journal: Applied Physics Letters
Appl. Phys. Lett. 109, 022107 (2016)
https://doi.org/10.1063/1.4958838
Published: July 2016
View articletitled, Observation of low voltage driven green emission from erbium doped Ga2O3 light-emitting devices
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Journal Articles

Temperature dependence of Raman scattering in β-(AlGa)2O3 thin films

Open Access
Xu Wang, Zhengwei Chen, Fabi Zhang, Katsuhiko Saito, Tooru Tanaka, Mitsuhiro Nishio, Qixin Guo
Journal: AIP Advances
AIP Advances 6, 015111 (2016)
https://doi.org/10.1063/1.4940763
Published: January 2016
View articletitled, Temperature dependence of Raman scattering in β-(AlGa)2O3 thin films
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Journal Articles

Energy band bowing parameter in MgZnO alloys

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Xu Wang, Katsuhiko Saito, Tooru Tanaka, Mitsuhiro Nishio, Takashi Nagaoka, Makoto Arita, Qixin Guo
Journal: Applied Physics Letters
Appl. Phys. Lett. 107, 022111 (2015)
https://doi.org/10.1063/1.4926980
Published: July 2015
View articletitled, Energy band bowing parameter in MgZnO alloys
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Journal Articles

Electronic structure of β-Ga2O3 single crystals investigated by hard X-ray photoelectron spectroscopy

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Guo-Ling Li, Fabi Zhang, Yi-Tao Cui, Hiroshi Oji, Jin-Young Son, Qixin Guo
Journal: Applied Physics Letters
Appl. Phys. Lett. 107, 022109 (2015)
https://doi.org/10.1063/1.4926919
Published: July 2015
View articletitled, Electronic structure of β-Ga2O3 single crystals investigated by hard X-ray photoelectron spectroscopy
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