Time-Resolved Photoluminescence Study of Silicon Nanoporous Pillar Array

doi:10.1088/0256-307X/32/9/097802

Chin. Phys. Lett.

2015, Vol. 32

Issue (09): 097802 DOI: 10.1088/0256-307X/32/9/097802

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Time-Resolved Photoluminescence Study of Silicon Nanoporous Pillar Array

WANG Xiao-Bo^1,2, YAN Ling-Ling^1,3, LI Yong⁴, LI Xin-Jian^1**

¹Department of Physics and Laboratory of Material Physics, Zhengzhou University, Zhengzhou 450052
²School of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000
³College of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000
⁴Department of Physics, Pingdingshan University, Pingdingshan 467000

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WANG Xiao-Bo, YAN Ling-Ling, LI Yong et al 2015 Chin. Phys. Lett. 32 097802

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Abstract A silicon nanoporous pillar array (Si-NPA) is thought to be a promising functional substrate for constructing a variety of Si-based optoelectronic nanodevices, due to its unique hierarchical structure and enhanced physical properties. This makes the in-depth understanding of the photoluminescence (PL) of Si-NPA crucial for both scientific research and practical applications. In this work, the PL properties of Si-NPA are studied by measuring both the steady-state and time-resolved PL spectrum. Based on the experimental data, the three PL bands of Si-NPA, i.e., the ultraviolet band, the purple-blue plateau and the red band are assigned to the oxygen-excess defects in Si oxide or silanol groups at the surface of Si nanocrystallites (nc-Si), oxygen deficiency defects in Si oxide, and band-to-band transition of nc-Si under the frame of quantum confinement combining with the surface states like Si=O and Si–O–Si bonds at the surface of nc-Si, respectively. These results may provide some novel insight into the PL process of Si-NPA and may be helpful for clarifying the PL mechanism.

Received: 17 February 2015 Published: 02 October 2015

PACS:	78.47.jd	(Time resolved luminescence)
	78.55.Mb	(Porous materials)
	78.60.Lc	(Optically stimulated luminescence)
	78.67.Hc	(Quantum dots)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/9/097802 OR https://cpl.iphy.ac.cn/Y2015/V32/I09/097802

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	WANG Xiao-Bo
	YAN Ling-Ling
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