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题名:
Broadband absorption enhancement in a-Si:H thin-film solar cells sandwiched by pyramidal nanostructured arrays
作者: Li, Chuanhao1,2; Xia, Liangping2; Gao, Hongtao2; Shi, Ruiying1; Sun, Chen; Shi, Haofei; Du, Chunlei
刊名: Optics Express
出版日期: 2012
卷号: 20, 期号:19, 页码:A589-A596
学科分类: Finite difference time domain method - Refractive index - Silicon - Wavelength
通讯作者: Du, C. (cldu@cigit.ac.cn)
文章类型: 期刊论文
中文摘要: A new thin-film solar cell structure with a broadband absorption enhancement is proposed. The active a-Si:H film is sandwiched by two periodic pyramidal structured layers. The upper dielectric pyramidal layer acts as matching impedance by gradual change of the effective refractive index to enhance the absorption of the active layer in the short wavelength range. The lower metallic pyramidal layer traps light by the excitation of Fabry-Perot (FP) resonance, waveguide (WG) resonance and surface plasmon (SP) mode to enhance the absorption in the long wavelength range. With the cooperation of the two functional layers, a broadband absorption enhancement is realized. The structure parameters are designed by the cavity resonance theory, which shows that the results are accordant with the finite-difference time-domain (FDTD) simulation. By optimizing, the absorption of the sandwich structure is enhanced up to 48% under AM1.5G illumination in the 350-900 nm wavelength range compared to that of bare thin-film solar cells. © 2012 Optical Society of America.
英文摘要: A new thin-film solar cell structure with a broadband absorption enhancement is proposed. The active a-Si:H film is sandwiched by two periodic pyramidal structured layers. The upper dielectric pyramidal layer acts as matching impedance by gradual change of the effective refractive index to enhance the absorption of the active layer in the short wavelength range. The lower metallic pyramidal layer traps light by the excitation of Fabry-Perot (FP) resonance, waveguide (WG) resonance and surface plasmon (SP) mode to enhance the absorption in the long wavelength range. With the cooperation of the two functional layers, a broadband absorption enhancement is realized. The structure parameters are designed by the cavity resonance theory, which shows that the results are accordant with the finite-difference time-domain (FDTD) simulation. By optimizing, the absorption of the sandwich structure is enhanced up to 48% under AM1.5G illumination in the 350-900 nm wavelength range compared to that of bare thin-film solar cells. © 2012 Optical Society of America.
收录类别: Ei
项目资助者: Chinese Nature Science [11074251, 11174281, 91123032] ; Chongqing Science & Technology Commission Distinguished Young Scholars Program [cstc2012jjjq002]
语种: 英语
WOS记录号: WOS:000308865600004
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/7261
Appears in Collections:微电子装备总体研究室(四室)_期刊论文

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作者单位: 1. Physics Department, Sichuan University, Chengdu 610064, China
2. Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Chengdu 610209, China
3. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China

Recommended Citation:
Li, Chuanhao,Xia, Liangping,Gao, Hongtao,et al. Broadband absorption enhancement in a-Si:H thin-film solar cells sandwiched by pyramidal nanostructured arrays[J]. Optics Express,2012,20(19):A589-A596.
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