Light trapping in bendable organic solar cells using silica nanoparticle arrays
- Authors
- Yun, Jungheum; Wang, Wei; Kim, Soo Min; Bae, Tae-Sung; Lee, Sunghun; Kim, Donghwan; Lee, Gun-Hwan; Lee, Hae-Seok; Song, Myungkwan
- Issue Date
- 2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, v.8, no.3, pp.932 - 940
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY & ENVIRONMENTAL SCIENCE
- Volume
- 8
- Number
- 3
- Start Page
- 932
- End Page
- 940
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/96244
- DOI
- 10.1039/c4ee01100g
- ISSN
- 1754-5692
- Abstract
- A highly efficient light-scattering layer, composed of quasi-periodic discrete silica nanoparticles directly deposited onto polymer substrates to produce bendable organic solar cells (OSCs) with enhanced light absorption, is reported. A silica nanoparticle layer (SNL) underwent self-assembly on a highly flexible and heat-sensitive polymer at room temperature during fabrication, which employed a unique plasma-enhanced chemical vapour deposition technique. Such efficient light-scattering SNLs have not been realizable by conventional solution-based coating techniques. SNLs were optimized by precisely controlling dimensional parameters, specifically, the nanoparticle layer thickness and interparticle distance. The optimized SNL exhibited an improved transmission haze of 16.8% in the spectral range of 350-700 nm, where reduction of the total transmission was suppressed to 2%. Coating light-scattering SNLs onto polymer substrates is a promising method for improving the light harvesting abilities of OSCs by enhancing the light absorption of photoactive polymer layers. This SNL-based flexible OSC exhibited a record power conversion efficiency (PCE) of 7.4%, representing a 13% improvement, while reducing the thickness of the photoactive polymer layer by 30%.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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