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Three‐Dimensional Nanostructured Indium‐Tin‐Oxide Electrodes for Enhanced Performance of Bulk Heterojunction Organic Solar Cells
Author(s) -
Kwon Hyunah,
Ham Juyoung,
Kim Dong Yeong,
Oh Seung Jae,
Lee Subin,
Oh Sang Ho,
Schubert E. Fred,
Lim KyungGeun,
Lee TaeWoo,
Kim Sungjun,
Lee JongLam,
Kim Jong Kyu
Publication year - 2014
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201301566
Subject(s) - materials science , indium tin oxide , optoelectronics , electrode , organic solar cell , energy conversion efficiency , heterojunction , polymer solar cell , anode , charge carrier , layer (electronics) , active layer , current density , nanotechnology , composite material , chemistry , physics , quantum mechanics , polymer , thin film transistor
A three‐dimensional indium tin oxide (ITO) nanohelix (NH) array is presented as a multifunctional electrode for bulk heterojunction organic solar cells for simultaneously improving light absorption and charge transport from the active region to the anode. It is shown that the ITO NH array, which is easily fabricated using an oblique‐angle‐deposition technique, acts as an effective antireflection coating as well as a light‐scattering layer, resulting in much enhanced light harvesting. Furthermore, the larger interfacial area between the electrode and the active layer, together with the enhanced carrier mobility through highly conductive ITO NH facilitate transport and collection of charge carriers. The optical and electrical improvements enabled by the ITO NH electrode result in a 10% increase in short‐circuit current density and power‐conversion efficiency of the solar cells.