Journal
ADVANCED ENERGY MATERIALS
Volume 4, Issue 8, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201301315
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2013-068407]
- National Research Foundation (NRF) by the Korean government (Ministry of Science, ICT & Future Planning, MSIP) through the Active Polymer Center for Pattern Integration (APCPI) [2007-0056091]
- National Research Foundation of Korea [2007-0056091, 22A20130012188, 2013R1A2A2A01068407] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Poly-dimethylsiloxane (PDMS) films with 2D periodic inverted moth-eye nanopatterns on one surface are implemented as antireflection (AR) layers on a glass substrate for efficient light capture in encapsulated organic solar cells (OSCs). The inverted moth-eye nanopatterned PDMS (IMN PDMS) films are fabricated by a soft imprint lithographic method using conical subwavelength grating patterns formed by laser interference lithography/dry etching. Their optical characteristics, together with theoretical analysis using rigorous coupled-wave analysis simulation, and wetting behaviors are investigated. For a period of 380 nm, IMN PDMS films laminated on glass substrates exhibit a hydrophobic surface with a water contact angle (theta(CA)) of approximate to 120 degrees and solar weighted transmittance (SWT) of approximate to 94.2%, both significantly higher than those (theta(CA)approximate to 36 degrees and SWT approximate to 90.3%) of bare glass substrates. By employing IMN PDMS films with a period of 380 nm on glass substrates for OSCs, an enhanced power conversion efficiency (PCE) of 6.19% is obtained mainly due to the increased short-circuit current density (J(sc)) of 19.74 mA cm(-2) compared to the OSCs with the bare glass substrates (PCE = 5.16% and J(sc) = 17.25 mA cm(-2)). For the OSCs, the device stability is also studied.
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