Modeling and optimization of sub-wavelength grating nanostructures on Cu(In,Ga)Se 2 solar cell

Shou Yi Kuo; Ming Yang Hsieh; Fang I. Lai; Yu Kuang Liao; Ming Hsuan Kao; Hao Chung Kuo

doi:10.1143/JJAP.51.10NC14

Modeling and optimization of sub-wavelength grating nanostructures on Cu(In,Ga)Se ₂ solar cell

Shou Yi Kuo^*, Ming Yang Hsieh, Fang I. Lai, Yu Kuang Liao, Ming Hsuan Kao, Hao Chung Kuo

^*Corresponding author for this work

Department of Electronic Engineering

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

7 Scopus citations

Abstract

In this study, an optical simulation of Cu(In,Ga)Se ₂ (CIGS) solar cells by the rigorous coupled-wave analysis (RCWA) method is carried out to investigate the effects of surface morphology on the light absorption and power conversion efficiencies. Various sub-wavelength grating (SWG) nanostructures of periodic ZnO:Al (AZO) on CIGS solar cells were discussed in detail. SWG nanostructures were used as efficient antireflection layers. From the simulation results, AZO structures with nipple arrays effectively suppress the Fresnel reflection compared with nanorod- and cone-shaped AZO structures. The optimized reflectance decreased from 8.44 to 3.02% and the efficiency increased from 14.92 to 16.11% accordingly. The remarkable enhancement in light harvesting is attributed to the gradient refractive index profile between the AZO nanostructures and air.

Original language	English
Article number	10NC14
Journal	Japanese Journal of Applied Physics
Volume	51
Issue number	10 PART 2
DOIs	https://doi.org/10.1143/JJAP.51.10NC14
State	Published - 10 2012

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title = "Modeling and optimization of sub-wavelength grating nanostructures on Cu(In,Ga)Se 2 solar cell",

abstract = "In this study, an optical simulation of Cu(In,Ga)Se 2 (CIGS) solar cells by the rigorous coupled-wave analysis (RCWA) method is carried out to investigate the effects of surface morphology on the light absorption and power conversion efficiencies. Various sub-wavelength grating (SWG) nanostructures of periodic ZnO:Al (AZO) on CIGS solar cells were discussed in detail. SWG nanostructures were used as efficient antireflection layers. From the simulation results, AZO structures with nipple arrays effectively suppress the Fresnel reflection compared with nanorod- and cone-shaped AZO structures. The optimized reflectance decreased from 8.44 to 3.02% and the efficiency increased from 14.92 to 16.11% accordingly. The remarkable enhancement in light harvesting is attributed to the gradient refractive index profile between the AZO nanostructures and air.",

author = "Kuo, {Shou Yi} and Hsieh, {Ming Yang} and Lai, {Fang I.} and Liao, {Yu Kuang} and Kao, {Ming Hsuan} and Kuo, {Hao Chung}",

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doi = "10.1143/JJAP.51.10NC14",

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publisher = "Japan Society of Applied Physics",

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T1 - Modeling and optimization of sub-wavelength grating nanostructures on Cu(In,Ga)Se 2 solar cell

AU - Kuo, Shou Yi

AU - Hsieh, Ming Yang

AU - Lai, Fang I.

AU - Liao, Yu Kuang

AU - Kao, Ming Hsuan

AU - Kuo, Hao Chung

PY - 2012/10

Y1 - 2012/10

N2 - In this study, an optical simulation of Cu(In,Ga)Se 2 (CIGS) solar cells by the rigorous coupled-wave analysis (RCWA) method is carried out to investigate the effects of surface morphology on the light absorption and power conversion efficiencies. Various sub-wavelength grating (SWG) nanostructures of periodic ZnO:Al (AZO) on CIGS solar cells were discussed in detail. SWG nanostructures were used as efficient antireflection layers. From the simulation results, AZO structures with nipple arrays effectively suppress the Fresnel reflection compared with nanorod- and cone-shaped AZO structures. The optimized reflectance decreased from 8.44 to 3.02% and the efficiency increased from 14.92 to 16.11% accordingly. The remarkable enhancement in light harvesting is attributed to the gradient refractive index profile between the AZO nanostructures and air.

AB - In this study, an optical simulation of Cu(In,Ga)Se 2 (CIGS) solar cells by the rigorous coupled-wave analysis (RCWA) method is carried out to investigate the effects of surface morphology on the light absorption and power conversion efficiencies. Various sub-wavelength grating (SWG) nanostructures of periodic ZnO:Al (AZO) on CIGS solar cells were discussed in detail. SWG nanostructures were used as efficient antireflection layers. From the simulation results, AZO structures with nipple arrays effectively suppress the Fresnel reflection compared with nanorod- and cone-shaped AZO structures. The optimized reflectance decreased from 8.44 to 3.02% and the efficiency increased from 14.92 to 16.11% accordingly. The remarkable enhancement in light harvesting is attributed to the gradient refractive index profile between the AZO nanostructures and air.

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Modeling and optimization of sub-wavelength grating nanostructures on Cu(In,Ga)Se ₂ solar cell

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