H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical Absorption
Cu2O is considered to be promising as an absorber layer material of solar cells, but its band gap (about 2.1 eV) is larger than the optimum one (about 1.5 eV). CuO has a smaller band gap of about 1.35 eV. Therefore, we attempted to oxidize Cu2O using H2O2 to increase oxygen ratio and decrease band g...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2013/738063 |
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| _version_ | 1832561863743766528 |
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| author | Ying Song Masaya Ichimura |
| author_facet | Ying Song Masaya Ichimura |
| author_sort | Ying Song |
| collection | DOAJ |
| description | Cu2O is considered to be promising as an absorber layer material of solar cells, but its band gap (about 2.1 eV) is larger than the optimum one (about 1.5 eV). CuO has a smaller band gap of about 1.35 eV. Therefore, we attempted to oxidize Cu2O using H2O2 to increase oxygen ratio and decrease band gap. Cu2O thin films were deposited on indium-tin-oxide-coated glass from an aqueous solution containing CuSO4, lactic acid, and KOH by the galvanostatic electrochemical deposition at 40°C with current density of −1 mA/cm2. Then, the as-prepared copper oxide thin film was dipped in H2O2 (30%) at fixed temperature to oxidize for some time. By the H2O2 treatment at room temperature, the oxygen content was increased, and the band gap was decreased. |
| format | Article |
| id | doaj-art-a68de9fe15bf4a06afa746310098ea31 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-a68de9fe15bf4a06afa746310098ea312025-02-03T01:24:04ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2013-01-01201310.1155/2013/738063738063H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical AbsorptionYing Song0Masaya Ichimura1Department of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Nagoya 466-8555, JapanDepartment of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Nagoya 466-8555, JapanCu2O is considered to be promising as an absorber layer material of solar cells, but its band gap (about 2.1 eV) is larger than the optimum one (about 1.5 eV). CuO has a smaller band gap of about 1.35 eV. Therefore, we attempted to oxidize Cu2O using H2O2 to increase oxygen ratio and decrease band gap. Cu2O thin films were deposited on indium-tin-oxide-coated glass from an aqueous solution containing CuSO4, lactic acid, and KOH by the galvanostatic electrochemical deposition at 40°C with current density of −1 mA/cm2. Then, the as-prepared copper oxide thin film was dipped in H2O2 (30%) at fixed temperature to oxidize for some time. By the H2O2 treatment at room temperature, the oxygen content was increased, and the band gap was decreased.http://dx.doi.org/10.1155/2013/738063 |
| spellingShingle | Ying Song Masaya Ichimura H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical Absorption International Journal of Photoenergy |
| title | H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical Absorption |
| title_full | H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical Absorption |
| title_fullStr | H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical Absorption |
| title_full_unstemmed | H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical Absorption |
| title_short | H2O2 Treatment of Electrochemically Deposited Cu2O Thin Films for Enhancing Optical Absorption |
| title_sort | h2o2 treatment of electrochemically deposited cu2o thin films for enhancing optical absorption |
| url | http://dx.doi.org/10.1155/2013/738063 |
| work_keys_str_mv | AT yingsong h2o2treatmentofelectrochemicallydepositedcu2othinfilmsforenhancingopticalabsorption AT masayaichimura h2o2treatmentofelectrochemicallydepositedcu2othinfilmsforenhancingopticalabsorption |