Multi-layer coating of SiO2 nanoparticles to enhance light absorption by Si solar cells
- Authors
- Nam, Yoon-Ho; Um, Han-Don; Park, Kwang-Tae; Shin, Sun-Mi; Baek, Jong-Wook; Park, Min-Joon; Jung, Jin-Young; Zhou, Keya; Jee, Sang-Won; Guo, Zhongyi; Lee, Jung-Ho
- Issue Date
- Jun-2012
- Publisher
- 한국물리학회
- Keywords
- Silicon solar cell; Antireflection coating; SiO2 nanoparticles; Multi-layer coating; Quarter-wavelength theory; Rayleigh scattering
- Citation
- Journal of the Korean Physical Society, v.60, no.11, pp.1944 - 1948
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Journal of the Korean Physical Society
- Volume
- 60
- Number
- 11
- Start Page
- 1944
- End Page
- 1948
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/32676
- DOI
- 10.3938/jkps.60.1944
- ISSN
- 0374-4884
- Abstract
- We found that multi-layer coating of a Si substrate with SiO2 dielectric nanoparticles (NPs) was an effective method to suppress light reflection by silicon solar cells. To suppress light reflection, two conditions are required for the coating: 1) The difference of refractive indexes between air and Si should be alleviated, and 2) the quarter-wavelength antireflection condition should be satisfied while avoiding intrinsic absorption loss. Light reflection was reduced due to destructive interference at certain wavelengths that depended on the layer thickness. For the same thickness dielectric layer, smaller NPs enhanced antireflectance more than larger NPs due to a decrease in scattering loss by the smaller NPs.
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