Si nanopillar array optimization on Si thin films for solar energy harvesting

被引：238

作者：

Li, Junshuai ^{[1
,2
]}

Yu, HongYu ^{[1
,2
]}

Wong, She Mein ^{[1
,2
]}

Zhang, Gang ^{[1
]}

Sun, Xiaowei ^{[1
,2
]}

Lo, Patrick Guo-Qiang ^{[1
]}

Kwong, Dim-Lee ^{[1
]}

机构：

[1] ASTAR, Inst Microelect, Singapore 117685, Singapore

[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 03期

关键词：

elemental semiconductors; finite element analysis; nanostructured materials; semiconductor thin films; silicon; solar cells; SILICON NANOWIRE; OPTICAL-ABSORPTION; CELLS; BAND;

D O I：

10.1063/1.3186046

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, Si thin film (800 nm thick) with nanopillar array decorated surface is studied via simulation for its solar energy absorption characteristics. It is found that the light absorption is significantly enhanced due to the adding of the Si nanopillar (SiNP) array to the Si thin film. The absorption characteristics of the SiNP structure would be approximately optimum (especially at similar to 2.5 eV, the high energy density region in the solar spectrum) when the periodicity of SiNP array is set as similar to 500 nm, which can be explained when comparing the incident light wavelength with the periodicity of SiNP array.

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