| Original Articles |
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Dependence of Photovoltaic Property of ZnO/Si Heterojunction Solar Cell on Thickness of ZnO Films |
| ZHANG Wei-Ying;ZHONG Sheng;SUN Li-Jie;FU Zhu-Xi |
| Department of Physics, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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ZHANG Wei-Ying, ZHONG Sheng, SUN Li-Jie et al 2008 Chin. Phys. Lett. 25 1829-1831 |
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Abstract N-ZnO/p-Si heterojunctions are prepared by sputtering deposition of intrinsic ZnO films on p-Si substrates. Thicknesses of ZnO films are altered by varying the deposition time from 1h to 3h. The electrical properties of these structures are analysed from capacitance--voltage (C--V) and current--voltage (I--V) characteristics performed in a dark room. The results demonstrated that all the samples show strong rectifying behaviour. Photovoltaic property for the samples with different thicknesses of ZnO films are investigated by measuring open circuit voltage and short circuit current. It is found that photovoltages are kept to be almost constant of 320mV along with the thickness while
photocurrents changing a lot. The variation mechanism of the photovoltaic effect as a function of thickness of ZnO films is investigated.N-ZnO/p-Si heterojunctions are prepared by sputtering deposition of intrinsic ZnO films on p-Si substrates. Thicknesses of ZnO films are altered by varying the deposition time from 1h to 3h. The electrical properties of these structures are analysed from capacitance--voltage (C--V) and current--voltage (I--V) characteristics performed in a dark room. The results demonstrated that all the samples show strong rectifying behaviour. Photovoltaic property for the samples with different thicknesses of ZnO films are investigated by measuring open circuit voltage and short circuit current. It is found that photovoltages are kept to be almost constant of 320mV along with the thickness while
photocurrents changing a lot. The variation mechanism of the photovoltaic effect as a function of thickness of ZnO films is investigated.
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72.40.+w
73.40.Lq
79.60. Jv
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Received: 13 December 2007
Published: 29 April 2008
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| PACS: |
72.40.+w
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(Photoconduction and photovoltaic effects)
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73.40.Lq
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(Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
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79.60. Jv
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