Journal
CHEMISTRY OF MATERIALS
Volume 27, Issue 10, Pages 3700-3706Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.5b00783
Keywords
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Funding
- Fundacio Privada Cellex
- European Commission's Seventh Framework Programme for Research [PIRG06-GA-2009-256355]
- European Community's Seventh Framework program [FP7-ENERGY.2012.10.2.1, 308997]
- Engineering and Physical Sciences Research Council [EP/J021199/1, EP/K039946/1] Funding Source: researchfish
- EPSRC [EP/J021199/1, EP/K039946/1] Funding Source: UKRI
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Low bandgap inorganic semiconductor nanowires have served as building blocks in solution processed solar cells to improve their power conversion capacity and reduce fabrication cost. In this work, we first reported bismuth sulfide nanowire arrays grown from colloidal seeds on a transparent conductive substrate via mild aqueous chemistry and demonstrated a novel core-shell nanowire architecture to enhance the photovoltaic performances of hybrid solar cells. We found that the bismuth sulfide nanowire core/silver sulfide shell structure reduces the interfacial charge recombination between the core and a hole transporter layer and enables efficient charge separation in a type-II core shell heterojunction. The bismuth sulfide nanowire core/silver sulfide shell combined with 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) reached solar-to-electricity power conversion efficiency of 2.5%, advancing the field of solution processed solar cells based on environmentally friendly metal chalcogenide semiconductors.
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