Wrinkles and deep folds as photonic structures in photovoltaics

Jong Bok Kim, Pilnam Kim, Nicolas C. Ṕgard, Soong Ju Oh, Cherie R. Kagan, Jason W. Fleischer, Howard A. Stone, Yueh Lin Loo

Research output: Contribution to journalArticle

253 Citations (Scopus)

Abstract

Some of the simplest light-harvesting systems in nature rely on the presence of surface structures to increase internal light scattering. We have extended this concept to increase the efficiencies of man-made solar energy harvesting systems. Specifically, we exploit the wrinkles and deep folds that form on polymer surfaces when subjected to mechanical stress to guide and retain light within the photo-active regions of photovoltaics. Devices constructed on such surfaces show substantial improvements in light harvesting efficiencies, particularly in the near-infrared region where light absorption is otherwise minimal. We report a vast increase in the external quantum efficiency of polymer photovoltaics by more than 600% in the near-infrared, where the useful range of solar energy conversion is extended by more than 200Â nm. This method of exploiting elastic instabilities of thin, layered materials is straightforward and represents an economical route to patterning photonic structures over large areas to improve the performance of optoelectronics.

Original languageEnglish
Pages (from-to)327-332
Number of pages6
JournalNature Photonics
Volume6
Issue number5
DOIs
Publication statusPublished - 2012 May 1
Externally publishedYes

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Photonics
photonics
Solar energy
Polymers
Infrared radiation
solar energy conversion
Energy harvesting
polymers
solar energy
electromagnetic absorption
Quantum efficiency
Energy conversion
Surface structure
Light scattering
Optoelectronic devices
Light absorption
quantum efficiency
light scattering
routes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Kim, J. B., Kim, P., Ṕgard, N. C., Oh, S. J., Kagan, C. R., Fleischer, J. W., ... Loo, Y. L. (2012). Wrinkles and deep folds as photonic structures in photovoltaics. Nature Photonics, 6(5), 327-332. https://doi.org/10.1038/nphoton.2012.70

Wrinkles and deep folds as photonic structures in photovoltaics. / Kim, Jong Bok; Kim, Pilnam; Ṕgard, Nicolas C.; Oh, Soong Ju; Kagan, Cherie R.; Fleischer, Jason W.; Stone, Howard A.; Loo, Yueh Lin.

In: Nature Photonics, Vol. 6, No. 5, 01.05.2012, p. 327-332.

Research output: Contribution to journalArticle

Kim, JB, Kim, P, Ṕgard, NC, Oh, SJ, Kagan, CR, Fleischer, JW, Stone, HA & Loo, YL 2012, 'Wrinkles and deep folds as photonic structures in photovoltaics', Nature Photonics, vol. 6, no. 5, pp. 327-332. https://doi.org/10.1038/nphoton.2012.70
Kim JB, Kim P, Ṕgard NC, Oh SJ, Kagan CR, Fleischer JW et al. Wrinkles and deep folds as photonic structures in photovoltaics. Nature Photonics. 2012 May 1;6(5):327-332. https://doi.org/10.1038/nphoton.2012.70
Kim, Jong Bok ; Kim, Pilnam ; Ṕgard, Nicolas C. ; Oh, Soong Ju ; Kagan, Cherie R. ; Fleischer, Jason W. ; Stone, Howard A. ; Loo, Yueh Lin. / Wrinkles and deep folds as photonic structures in photovoltaics. In: Nature Photonics. 2012 ; Vol. 6, No. 5. pp. 327-332.
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