Controlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity doping
We studied electron carrier doping into the ternary wurtzite β-AgGaO2 by impurity doping. Ti-doped β-NaGaO2, i.e., β-Na(Ga1−xTix)O2, was prepared by a conventional high-temperature solid-state reaction; then, we performed ion-exchange of Na+ ions with Ag+ ions into the Ti-doped β-NaGaO2 in a molten...
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doaj-41cbc71fc50040248aba076821a833472020-11-24T22:22:33ZengAIP Publishing LLCAIP Advances2158-32262018-08-0188085203085203-910.1063/1.5046361128807ADVControlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity dopingHiraku Nagatani0Issei Suzuki1Sayuri Takemura2Takeo Ohsawa3Naoki Ohashi4Shinji Fujimoto5Takahisa Omata6Division of Material and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, JapanInstitute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai 980-8577, JapanInstitute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai 980-8577, JapanNational Institute for Materials Science, Tsukuba, Ibaraki 305-0044, JapanNational Institute for Materials Science, Tsukuba, Ibaraki 305-0044, JapanDivision of Material and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, JapanInstitute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai 980-8577, JapanWe studied electron carrier doping into the ternary wurtzite β-AgGaO2 by impurity doping. Ti-doped β-NaGaO2, i.e., β-Na(Ga1−xTix)O2, was prepared by a conventional high-temperature solid-state reaction; then, we performed ion-exchange of Na+ ions with Ag+ ions into the Ti-doped β-NaGaO2 in a molten nitrate salt to produce Ti-doped β-AgGaO2: β-Ag(Ga1−xTix)O2. A single ternary wurtzite phase was obtained at compositions of 0≤x≤0.05. Ti-doped β-AgGaO2 showed an electrical conductivity at room temperature that was one to three orders of magnitude higher than that of undoped β-AgGaO2. The Ti-doped β-AgGaO2 samples showed an electron carrier density in the range of 1018−1019 cm−3, based on the free-carrier absorption shown in their optical absorption spectra. These results show that carrier injection by impurity doping into metastable β-CuMIIIO2 and β-AgMIIIO2 is possible by using an impurity-doped β-NaGaO2 precursor. This result encourages the development of optoelectronic devices based on the narrow-band-gap oxide semiconductors of β-CuMIIIO2 and β-AgMIIIO2.http://dx.doi.org/10.1063/1.5046361 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hiraku Nagatani Issei Suzuki Sayuri Takemura Takeo Ohsawa Naoki Ohashi Shinji Fujimoto Takahisa Omata |
spellingShingle |
Hiraku Nagatani Issei Suzuki Sayuri Takemura Takeo Ohsawa Naoki Ohashi Shinji Fujimoto Takahisa Omata Controlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity doping AIP Advances |
author_facet |
Hiraku Nagatani Issei Suzuki Sayuri Takemura Takeo Ohsawa Naoki Ohashi Shinji Fujimoto Takahisa Omata |
author_sort |
Hiraku Nagatani |
title |
Controlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity doping |
title_short |
Controlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity doping |
title_full |
Controlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity doping |
title_fullStr |
Controlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity doping |
title_full_unstemmed |
Controlling the electrical conductivity of ternary wurtzite-type and metastable β-AgGaO2 by impurity doping |
title_sort |
controlling the electrical conductivity of ternary wurtzite-type and metastable β-aggao2 by impurity doping |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2018-08-01 |
description |
We studied electron carrier doping into the ternary wurtzite β-AgGaO2 by impurity doping. Ti-doped β-NaGaO2, i.e., β-Na(Ga1−xTix)O2, was prepared by a conventional high-temperature solid-state reaction; then, we performed ion-exchange of Na+ ions with Ag+ ions into the Ti-doped β-NaGaO2 in a molten nitrate salt to produce Ti-doped β-AgGaO2: β-Ag(Ga1−xTix)O2. A single ternary wurtzite phase was obtained at compositions of 0≤x≤0.05. Ti-doped β-AgGaO2 showed an electrical conductivity at room temperature that was one to three orders of magnitude higher than that of undoped β-AgGaO2. The Ti-doped β-AgGaO2 samples showed an electron carrier density in the range of 1018−1019 cm−3, based on the free-carrier absorption shown in their optical absorption spectra. These results show that carrier injection by impurity doping into metastable β-CuMIIIO2 and β-AgMIIIO2 is possible by using an impurity-doped β-NaGaO2 precursor. This result encourages the development of optoelectronic devices based on the narrow-band-gap oxide semiconductors of β-CuMIIIO2 and β-AgMIIIO2. |
url |
http://dx.doi.org/10.1063/1.5046361 |
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