Sol-gel prepared β - Ga 2 O 3 thin films for ultraviolet photodetectors
β - Ga 2 O 3 thin films have been prepared on (0001) sapphire substrates by the sol-gel method. X-ray diffraction showed that β - Ga 2 O 3 polycrystalline films were formed at heat-treatment temperatures above 600 ° C . With increasing heat-treatment temperature above 900 ° C , the lattice constants...
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| Published in | Applied physics letters Vol. 90; no. 3; pp. 031912 - 031912-3 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Published |
American Institute of Physics
19.01.2007
|
| Online Access | Get full text |
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| Abstract | β
-
Ga
2
O
3
thin films have been prepared on (0001) sapphire substrates by the sol-gel method. X-ray diffraction showed that
β
-
Ga
2
O
3
polycrystalline films were formed at heat-treatment temperatures above
600
°
C
. With increasing heat-treatment temperature above
900
°
C
, the lattice constants of the
β
-
Ga
2
O
3
films decreased, while the band gap increased. Planar geometry photoconductive detectors based on the sol-gel prepared
β
-
Ga
2
O
3
thin films have been fabricated. They showed the photoresponse only for the wavelengths shorter than
270
nm
, which correspond to the solar-blind region. The peak wavelength in the spectral response depended on the heat-treatment temperature in the sol-gel process. |
|---|---|
| AbstractList | β
-
Ga
2
O
3
thin films have been prepared on (0001) sapphire substrates by the sol-gel method. X-ray diffraction showed that
β
-
Ga
2
O
3
polycrystalline films were formed at heat-treatment temperatures above
600
°
C
. With increasing heat-treatment temperature above
900
°
C
, the lattice constants of the
β
-
Ga
2
O
3
films decreased, while the band gap increased. Planar geometry photoconductive detectors based on the sol-gel prepared
β
-
Ga
2
O
3
thin films have been fabricated. They showed the photoresponse only for the wavelengths shorter than
270
nm
, which correspond to the solar-blind region. The peak wavelength in the spectral response depended on the heat-treatment temperature in the sol-gel process. |
| Author | Miura, Kasumi Kokubun, Yoshihiro Nakagomi, Shinji Endo, Fumie |
| Author_xml | – sequence: 1 givenname: Yoshihiro surname: Kokubun fullname: Kokubun, Yoshihiro email: kokubun@isenshu-u.ac.jp organization: Department of Information Technology and Electronics, Faculty of Science and Engineering,Ishinomaki Senshu University, 1 Shinmito, Minamisakai, Ishinomaki, Miyagi 986-8580, Japan – sequence: 2 givenname: Kasumi surname: Miura fullname: Miura, Kasumi organization: Department of Information Technology and Electronics, Faculty of Science and Engineering,Ishinomaki Senshu University, 1 Shinmito, Minamisakai, Ishinomaki, Miyagi 986-8580, Japan – sequence: 3 givenname: Fumie surname: Endo fullname: Endo, Fumie organization: Department of Information Technology and Electronics, Faculty of Science and Engineering,Ishinomaki Senshu University, 1 Shinmito, Minamisakai, Ishinomaki, Miyagi 986-8580, Japan – sequence: 4 givenname: Shinji surname: Nakagomi fullname: Nakagomi, Shinji organization: Department of Information Technology and Electronics, Faculty of Science and Engineering,Ishinomaki Senshu University, 1 Shinmito, Minamisakai, Ishinomaki, Miyagi 986-8580, Japan |
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| Cites_doi | 10.1103/PhysRev.140.A316 10.1063/1.1330559 10.1063/1.119233 10.1016/0040-6090(95)08161-5 10.1016/0022-3093(88)90079-8 10.1016/S0925-4005(03)00171-0 10.1149/1.1342183 10.1002/1521-396X(200111)188:1<293::AID-PSSA293>3.0.CO;2-D 10.1016/0040-6090(90)90132-W 10.1143/JJAP.36.L1191 10.1063/1.2179373 10.1143/JJAP.42.L904 10.1063/1.2193463 |
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| Copyright | 2007 American Institute of Physics |
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| Snippet | β
-
Ga
2
O
3
thin films have been prepared on (0001) sapphire substrates by the sol-gel method. X-ray diffraction showed that
β
-
Ga
2
O
3
polycrystalline... |
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| StartPage | 031912 |
| Title | Sol-gel prepared β - Ga 2 O 3 thin films for ultraviolet photodetectors |
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