Wavelength-Scale Structures as Extremely High Haze Films for Efficient Polymer Solar Cells
SCIE
SCOPUS
- Title
- Wavelength-Scale Structures as Extremely High Haze Films for Efficient Polymer Solar Cells
- Authors
- Ham, J; Dong, WJ; Jung, GH; Lee, JL
- Date Issued
- 2016-03-09
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Wavelength-scale inverted pyramid structures with low reflectance and excellent haze have been designed for application to polymer solar cells (PSCs). The wavelength-scale structured haze films are fabricated on the back surface of glass without damages to organic active layer by using a soft lithographic technique with etched GaN molds. With a rigorous coupled-wave analysis of optical modeling, we find the shift of resonance peaks with the increase of pattern's diameter. Wavelength-scale structures could provide the number of resonances at the long wavelength spectrum (lambda = 650-800 nm), yielding enhancement of power conversion efficiency (PCE) in the PSCs. Compared with a flat device (PCE = 7.12%, J(sc) = 15.6 mA/cm(2)), improved PCE of 8.41% is achieved in a haze film, which is mainly due to the increased short circuit current density (J(sc)) of 17.5 mA/cm(2). Hence, it opens up exciting opportunities for a variety of PSCs with wavelength-scale structures to further improve performance, simplify complicated process, and reduce costs.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/38072
- DOI
- 10.1021/ACSAMI.5B11061
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS APPLIED MATERIALS & INTERFACES, vol. 8, no. 9, page. 5990 - 5997, 2016-03-09
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