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- W2334339811 abstract "2,4-Bis[4'-(N,N-di(4″-hydroxyphenyl)amino)-2',6'-dihydroxyphenyl]squaraine (Sq-TAA-OH, optical bandgap 1.4 eV, HOMO level -5.3 eV by ultraviolet photoelectron spectroscopy) is used as an active layer material in solution processed, bulk-heterojunction organic photovoltaic cells with configuration ITO/PEDOT:PSS/Sq-TAA-OH:PC71BM/LiF/Al. Power conversion efficiencies (PCEs) up to 4.8% are obtained by a well-reproducible procedure using a mixture of good and poor Sq-TAA-OH solubilizing organic solvents, with diiodooctane (DIO) additive to make a bulk heterojunction layer, followed by thermal annealing, to give optimized V(OC) = 0.84-0.86 V, J(SC) = 10 mA cm(-2), and FF = 0.53. X-ray diffraction and scattering studies of pristine, pure Sq-TAA-OH solution-cast films show d-spacing features similar to single-crystal packing and spacing. The DIO additive in a good solvent/poor solvent mixture apparently broadens the size distribution of Sq-TAA-OH crystallites in pristine films, but thermal annealing provides a narrower size distribution. Direct X-ray diffraction and scattering morphological studies of as-fabricated active layers show improved Sq-TAA-OH/PC71BM phase separation and formation of crystallites, ∼48 nm in size, under conditions that give the best PCE." @default.
- W2334339811 created "2016-06-24" @default.
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- W2334339811 date "2014-07-14" @default.
- W2334339811 modified "2023-10-11" @default.
- W2334339811 title "Crystallinity and Morphology Effects on a Solvent-Processed Solar Cell Using a Triarylamine-Substituted Squaraine" @default.
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- W2334339811 doi "https://doi.org/10.1021/am501965d" @default.
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