Enhanced light harvesting in bulk heterojunction photovoltaic devices with shape-controlled Ag nanomaterials: Ag nanoparticles versus Ag nanoplates

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Enhanced power conversion efficiency (PCE(%)) with improved optical path length from two types of shape controlled silver (Ag) materials (Ag nanoplates versus Ag nanoparticles (NPs)) was studied in poly(3-hexylthiophene) (P3HT)/[6,6]-phenyl C-71 butyric acid methyl-ester (PC71BM) or poly[N-9"-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT)/[6,6]-phenyl C-71 butyric acid methyl-ester (PC71BM) bulk heterojunction (BHJ) devices. The Ag nanoplates and Ag NPs can be synthesized by simple solution polyol chemistry with well defined size and shape. A BHJ with a 0.5 wt% optimized blend ratio of Ag nanoplates shows improved cell performance and photo-current density than a BHJ with Ag NPs owing to the enhanced light absorption with the results of an excitation of localized surface plasmon and efficient light scattering by the Ag nanoplates embedded BHJ film. When the BHJ is combined with the Ag nanoplates at an optimized ratio of 0.5 wt%, the PCE (%) increases from 3.2% to 4.4% in P3HT/PC71BM, and from 5.9% to 6.6% in PCDTBT/PC71BM BHJ devices.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2012
Language
English
Article Type
Article
Keywords

POLYMER SOLAR-CELLS; STAMPING TRANSFER; ACIDMETHYL ESTER; EFFICIENCY; PERFORMANCE; AU

Citation

RSC ADVANCES, v.2, no.18, pp.7268 - 7272

ISSN
2046-2069
DOI
10.1039/c2ra20815f
URI
http://hdl.handle.net/10203/103038
Appears in Collection
CBE-Journal Papers(저널논문)
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