Well defined double layers via binary solvent mixtures for highly efficient inverted all-polymer solar cells

Layer-by-layer fabrication of organic photovoltaic devices: material selection and processing conditions

“…23,25,26,30,155,[173][174][175][176][177][178][179][180][181][182][183][184][185][186] Recently, NFAs have been integrated into spin casted bilayer devices, enabling PCEs in excess of 10%. 28,29,44,49,59,123,125,126,129,130,133,[187][188][189][190] One example of a NFA system is PBTB-TFS1 ( Fig. 6, b43)/ITIC-4F (Fig.…”

“…59 Cui et al demonstrated that solubility and solvent choice are key for high performing LbL OPV devices. 59 Numerous studies have since shown the pseudo-bilayer morphology is susceptible to variations in the solvent or cosolvent, 130,[144][145][146]157,167,168,170,173,175,177,187,189 but is also influenced by other parameters such as thermal annealing, 24,132,134,137,152,153,155,156,160,161,181,184,191,193,194 use of additives, 26,166,168,171,176,180,182 or addition of binary components to the donor polymer. 141,143,148,158,161 Cho et al explored how solvent choice influenced morphology and phase separation in P3HT layers.…”

High‐Throughput Screening of Blade‐Coated Polymer:Polymer Solar Cells: Solvent Determines Achievable Performance

“…[20,21] Many efforts have been addressed to improve the morphology of all-PSCs by modifying the polymer structure, like side-chain engineering of the polymer backbone, [22,23] developing random copolymers, [24,25] or optimizing the molecular weight of the polymers. [26] Moreover, from a practical point of view, there are many examples of controlling the film morphology of all-PSCs blends by optimizing the deposition parameters; some examples include the use of different additives and solvents, [16,17,27,28] thermal and solvent annealing, [29,30] sequentially depositing the polymers (layer-by-layer), [31][32][33] mixed-flow microfluidic, [34] and even ternary systems. [4,5,35] In most cases, spin coating with rapidly evaporating solvents is used to freeze the solution microstructure and thus prevent large-scale phase separation.…”

Nanostructured Molecular Packing of Polymer Films Formed on Water Surfaces

“…The intermolecular interactions of the polymer chains can be controlled by varying the solvents used for film formation because of the significant influence of solvent–polymer interactions on the chain conformations. Thus, appropriate solvent mixtures have been used to finely tune the molecular orientation of conjugated polymer films. − …”