| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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The Surface Photovoltaic and Photoluminescent Evolution of a Silicon Nanoporous Pillar Array for Different Etching Times |
| HU Zhen-Gang**, TIAN Yong-Tao, LI Xin-Jian |
Department of Physics and Laboratory of Material Physics, Zhengzhou University, Zhengzhou 450001
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| Cite this article: |
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HU Zhen-Gang, TIAN Yong-Tao, LI Xin-Jian 2013 Chin. Phys. Lett. 30 067803 |
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Abstract A series of silicon nanoporous pillar array (Si-NPA) samples are prepared with different times of hydrothermal etching, and their surface morphologies are characterized. A systematic study on the evolution trend of the surface photovoltage and photoluminescence spectra discloses that the adoption of a prolonged etching time will increase the native degree of oxidation and decrease the interfacial states density localized in the SiOx matrix. These results might be helpful for designing Si-NPA-based semiconductor nanosystems with optimized physical properties.
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Received: 31 January 2013
Published: 31 May 2013
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