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Enhancement of Light Absorption in Photovoltaic Devices using Textured Polydimethylsiloxane Stickers

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Title
Enhancement of Light Absorption in Photovoltaic Devices using Textured Polydimethylsiloxane Stickers
Author
Hwang, InchanChoi, DeokjaeLee, SojeongSeo, Ji HoonKim, Ka-HyunYoon, IlsungSeo, Kwanyong
Issue Date
2017-06
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v.9, no.25, pp.21276 - 21282
Abstract
We designed and fabricated a random-size inverted-pyramid-structured polydimethylsiloxane (RSIPS-PDMS) sticker to enhance the light absorption of solar cells and thus increase their efficiency. The fabricated sticker was laminated onto bare-glass and crystalline-silicon (c-Si) surfaces; consequently, low solar-weighted reflectance values were obtained for these surfaces (6.88% and 17.2%, respectively). In addition, we found that incident light was refracted at the PDMS-air interface of each RSIPS, which redirected the incident power and significantly increased the optical path length in the RSIPS-PDMS sticker which was 14.7% greater than that in a flat-PDMS sticker. Moreover, we investigated power reflection and propagation through the RSIPS-PDMS sticker using a finite-difference time-domain method. By attaching an RSIPS-PDMS sticker onto both an organic solar cell (OSC) based on a glass substrate and a c-Si solar cell, the power conversion efficiency of the OSC and the c-Si solar cell were increased from 8.57% to 8.94% and from 16.2% to 17.9%, respectively. Thus, the RSIPS-PDMS sticker is expected to be universally applicable to the surfaces of solar cells to enhance their light absorption.
URI
https://scholarworks.unist.ac.kr/handle/201301/22236
URL
http://pubs.acs.org/doi/abs/10.1021/acsami.7b04525
DOI
10.1021/acsami.7b04525
ISSN
1944-8244
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