Organic photovoltaics (OPVs) were fabricated with blended active layers of poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]]:[6,6]-phenylC71-butyric acid methyl ester (PTB7:PC71BM). The active layers were prepared in chlorobenzene (CB) with different additives of 1,8-diiodooctane (DIO) and 1,8-dibromooctane and different concentrations using a wet process with spin coating. The effects of different solvent additives were studied with respect to photovoltaic parameters such as fill factor, short circuit current density, and power conversion efficiency. The absorption and surface morphology of the active layers were investigated by UV-visible spectroscopy, atomic force microscopy (AFM) and time-of-flight secondary ion mass spectrometry (TOF-SIMS), respectively. The results indicated that structural and morphological changes were induced by the solvent additives. The polymer solar cells (PSCs) of PTB7/PC71BM prepared by a spin coating method using DIO and 1,8-dibromooctane showed more improved PCE of 6.76%. The enhancement of performance of PSCs could be mainly attributed to the absorption enhancement and the improved charge carrier transportation.
N. R. Elezović, B. M. Babić, Lj. M. Vračar, V. R. Radmilović, N. V. Krstajić
DOI: 10.1039/B822249E
Alex Mogilner
DOI: 10.1039/B818482H
Ana Belen Fernandez, Ines Lezcano-Gonzalez, Mercedes Boronat, Teresa Blasco, Avelino Corma
DOI: 10.1039/B816276J
Cristelle Portet, María Ángeles Lillo-Ródenas, Angel Linares-Solano, Yury Gogotsi
DOI: 10.1039/B816514A
Thuat T. Trinh, Antonius P. J. Jansen, Rutger A. van Santen, Evert Jan Meijer
DOI: 10.1039/B819817A
Norge C. Hernández, Ricardo Grau-Crespo, Nora H. de Leeuw, Javier Fdez. Sanz
DOI: 10.1039/B820373C
Arthur R. Rogers, Jonathan W. Driver, Pamela E. Constantinou, D. Kenneth Jamison
DOI: 10.1039/B900964G
Eneritz Muguruza González, Leonardo Guidoni, Carla Molteni
DOI: 10.1039/B902615K
Scott W. Wren, Kristen M. Vogelhuber, Kent M. Ervin, W. Carl Lineberger
DOI: 10.1039/B822690C
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![Disodium (6R,7R)-7-{[(2R)-2-hydroxy-2-phenylacetyl]amino}-8-oxo-3-({[1-(sulfonatomethyl)-1H-tetrazol-5-yl]sulfanyl}methyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate structure](https://static.chemtradehub.com/structs/612/61270-78-8-6b58.webp "Disodium (6R,7R)-7-{[(2R)-2-hydroxy-2-phenylacetyl]amino}-8-oxo-3-({[1-(sulfonatomethyl)-1H-tetrazol-5-yl]sulfanyl}methyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate structure")
![2,5-Furandione, dihydro-3-[3-(triethoxysilyl)propyl]- structure](https://static.chemtradehub.com/structs/936/93642-68-3-3b4b.webp "2,5-Furandione, dihydro-3-[3-(triethoxysilyl)propyl]- structure")
