Use of two-dimensional nanorod arrays with slanted ITO film to enhance optical absorption for photovoltaic applications

Yung Chi Yao; Meng Tsan Tsai; Hsu Cheng Hsu; Li Wei She; Chun Mao Cheng; Yi Ching Chen; Chien Jang Wu; Ya Ju Lee

doi:10.1364/OE.20.003479

Use of two-dimensional nanorod arrays with slanted ITO film to enhance optical absorption for photovoltaic applications

Yung Chi Yao^*, Meng Tsan Tsai, Hsu Cheng Hsu, Li Wei She, Chun Mao Cheng, Yi Ching Chen, Chien Jang Wu, Ya Ju Lee

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Two-dimensional (2D) Si-nanorod arrays offer a promising architecture that has been widely recognized as attractive devices for photovoltaic applications. To further reduce the Fresnel reflection that occurs at the interface between the air and the 2D Si-nanorod array because of the large difference in their effective refractive indices, we propose and adopt a slanted ITO film as an intermediate layer by using oblique-angle sputtering deposition. The nearly continuous surface of the slanted ITO film is lossless and has high electrical conductivity; therefore, it could serve as an electrode layer for solar cells. As a result, the combination of the above-mentioned nanostructures exhibits high optical absorption over a broad range of wavelengths and incident angles, along with a calculated short-circuit current density of J_SC = 32.81 mA/cm² and a power generation efficiency of η = 22.70%, which corresponds to an improvement of approximately 42% over that of its bare single-crystalline Si counterpart.

Original language	English
Pages (from-to)	3479-3489
Number of pages	11
Journal	Optics Express
Volume	20
Issue number	4
DOIs	https://doi.org/10.1364/OE.20.003479
Publication status	Published - 2012 Feb 13

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.20.003479

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title = "Use of two-dimensional nanorod arrays with slanted ITO film to enhance optical absorption for photovoltaic applications",

abstract = "Two-dimensional (2D) Si-nanorod arrays offer a promising architecture that has been widely recognized as attractive devices for photovoltaic applications. To further reduce the Fresnel reflection that occurs at the interface between the air and the 2D Si-nanorod array because of the large difference in their effective refractive indices, we propose and adopt a slanted ITO film as an intermediate layer by using oblique-angle sputtering deposition. The nearly continuous surface of the slanted ITO film is lossless and has high electrical conductivity; therefore, it could serve as an electrode layer for solar cells. As a result, the combination of the above-mentioned nanostructures exhibits high optical absorption over a broad range of wavelengths and incident angles, along with a calculated short-circuit current density of JSC = 32.81 mA/cm2 and a power generation efficiency of η = 22.70%, which corresponds to an improvement of approximately 42% over that of its bare single-crystalline Si counterpart.",

author = "Yao, {Yung Chi} and Tsai, {Meng Tsan} and Hsu, {Hsu Cheng} and She, {Li Wei} and Cheng, {Chun Mao} and Chen, {Yi Ching} and Wu, {Chien Jang} and Lee, {Ya Ju}",

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doi = "10.1364/OE.20.003479",

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AU - Yao, Yung Chi

AU - Tsai, Meng Tsan

AU - Hsu, Hsu Cheng

AU - She, Li Wei

AU - Cheng, Chun Mao

AU - Chen, Yi Ching

AU - Wu, Chien Jang

AU - Lee, Ya Ju

PY - 2012/2/13

Y1 - 2012/2/13

N2 - Two-dimensional (2D) Si-nanorod arrays offer a promising architecture that has been widely recognized as attractive devices for photovoltaic applications. To further reduce the Fresnel reflection that occurs at the interface between the air and the 2D Si-nanorod array because of the large difference in their effective refractive indices, we propose and adopt a slanted ITO film as an intermediate layer by using oblique-angle sputtering deposition. The nearly continuous surface of the slanted ITO film is lossless and has high electrical conductivity; therefore, it could serve as an electrode layer for solar cells. As a result, the combination of the above-mentioned nanostructures exhibits high optical absorption over a broad range of wavelengths and incident angles, along with a calculated short-circuit current density of JSC = 32.81 mA/cm2 and a power generation efficiency of η = 22.70%, which corresponds to an improvement of approximately 42% over that of its bare single-crystalline Si counterpart.

AB - Two-dimensional (2D) Si-nanorod arrays offer a promising architecture that has been widely recognized as attractive devices for photovoltaic applications. To further reduce the Fresnel reflection that occurs at the interface between the air and the 2D Si-nanorod array because of the large difference in their effective refractive indices, we propose and adopt a slanted ITO film as an intermediate layer by using oblique-angle sputtering deposition. The nearly continuous surface of the slanted ITO film is lossless and has high electrical conductivity; therefore, it could serve as an electrode layer for solar cells. As a result, the combination of the above-mentioned nanostructures exhibits high optical absorption over a broad range of wavelengths and incident angles, along with a calculated short-circuit current density of JSC = 32.81 mA/cm2 and a power generation efficiency of η = 22.70%, which corresponds to an improvement of approximately 42% over that of its bare single-crystalline Si counterpart.

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Use of two-dimensional nanorod arrays with slanted ITO film to enhance optical absorption for photovoltaic applications

Abstract

ASJC Scopus subject areas

UN SDGs

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