Journal
NANO LETTERS
Volume 12, Issue 10, Pages 5143-5147Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl3020445
Keywords
Upgraded metallurgical-grade silicon; flexible solar cell; surface plasmons; nanopillars; block copolymer nanolithography
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Funding
- National Science Foundation [CBET-1066447]
- Air Force Office of Scientific Research (AFOSR) [FA9550-11-1-0017]
- Department of Energy Office of Science Graduate Fellowship program
- National Science Foundation
- Directorate For Engineering [1066447] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys [1066447] Funding Source: National Science Foundation
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We present a thin film (<20 mu m) solar cell based on upgraded metallurgical-grade polycrystalline Si that utilizes silver nanoparticles atop silicon nanopillars created by block copolymer nanolithography to enhance light absorption and increase cell efficiency eta > 8%. In addition, the solar cells are flexible and semitransparent so as to reduce balance of systems costs and open new applications for conformable solar cell arrays on a variety of surfaces. Detailed studies on the optical and electrical properties of the resulting solar cells suggest that both antireflective and light-trapping mechanisms are key to the enhanced efficiency.
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