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The Surface Photovoltaic and Photoluminescent Evolution of a Silicon Nanoporous Pillar Array for Different Etching Times

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【作者】 胡振纲田永涛李新建

【Author】 HU Zhen-Gang;TIAN Yong-Tao;LI Xin-Jian;Department of Physics and Laboratory of Material Physics,Zhengzhou University;

【机构】 Department of Physics and Laboratory of Material Physics,Zhengzhou University

【摘要】 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 SiO_x matrix.These results might be helpful for designing Si-NPA-based semiconductor nanosystems with optimized physical properties.

【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 SiO_x matrix.These results might be helpful for designing Si-NPA-based semiconductor nanosystems with optimized physical properties.

【基金】 Supported by the National Natural Science Foundation of China under Grant No 11074224
  • 【文献出处】 Chinese Physics Letters ,中国物理快报(英文版) , 编辑部邮箱 ,2013年06期
  • 【分类号】O472.3
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