The interlayer materials used in non-fullerene based solar cells are reviewed and the peculiar mechanisms operating these systems discussed.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRigid rod conjugated polymers for nonlinear optics: 1. Characterization and linear optical properties of poly(aryleneethynylene) derivativesM. Moroni, J. Le Moigne, S. LuzzatiCite this: Macromolecules 1994, 27, 2, 562–571Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://pubs.acs.org/doi/10.1021/ma00080a034https://doi.org/10.1021/ma00080a034research-articleACS...

Colloidal nanoplatelets (NPLs), owing to their efficient and narrow-band luminescence, are considered as promising candidates for solution-processable light-emitting diodes (LEDs) with ultrahigh color purity. To date, however, the record efficiencies of NPL-LEDs significantly lower than those more-investigated devices based on spherical nanocrystals. This is particularly true red-emitting NPL-LEDs, best-reported external quantum efficiency (EQE) which limited 0.63% (EQE = 5% green NPL-LEDs)....

Abstract In this study, the development of first fully‐organic circularly polarized near‐infrared organic light–emitting diode (CP‐NIR‐OLED) is presented. The devices are made by using a co‐assembled active layer consisting commercially available NIR‐emitting indacenodithienothiophene‐based molecule (ITIC) and chiral inducer. Here, ITIC, which traditionally utilized as non‐fullerene acceptor in photovoltaics for its superior characteristics, demonstrated to act an effective NIR emitter...

In order to make a comparison between the properties of low molecular weight poly(phenyleneethynylene) type compounds and corresponding high polymers, we have synthesized oligomers model molecules derivatives by two different routes. This paper describes synthesis X-ray optical characterization conjugated soluble oligomers, as well trimers pentamers same structure in which solubility was improved fixing flexible alkyl chains 10 or 12 carbons backbone. The electron density on phenyl ring also...

We present a study of the photoexcitation mechanism poly-3-alkylthienylene and poly-3-alkylthienylenevinylene polymer solutions. photoinduced absorption under steady-state far from conditions. By calculating analytical dependence signal on pump intensity chop frequency we distinguish bimolecular recombination for both single chain aggregated The results are discussed assuming that weak reversible charge transfer between photoexcited solvent takes place.

In a recent report (Eur. J. Org. Chem. 2014, 30, 6583) we emphasized the importance of addressing research efforts in OPV-active materials toward synthetic processes scalable up to industrial production. this context, palladium-catalyzed direct (hetero)arylation polymerization (DHAP) can be suitable approach reduce number reaction steps and avoid use toxic reagents synthesis donor polymers. Random donor–acceptor copolymers have been shown promising for bulk heterojunction (BHJ) solar cells...

Small conjugated molecules (SM) are gaining momentum as an alternative to semiconducting polymers for the production of solution‐processed bulk heterojunction (BHJ) solar cells. The major issue with SM‐BHJs is low carrier mobility due scarce control on phase‐segregation process and consequent lack preferential percolative pathways electrons holes extraction electrodes. Here, a new paradigm fine tuning in SM‐BHJs, based post‐deposition exploitation latent hydrogen bonding binary mixtures PCBM...

Pd(PPh₃)₄-catalyzed direct (hetero)arylation polymerization (DHAP) affords <bold>PBDTTPD</bold> in higher molar mass than Stille coupling. <bold>PDHAP</bold>-based solar cells display PCE up to 5.3%.

Attenuated total reflection Fourier transform infrared (ATR-FTIR) investigations on the doping processes in substituted poly(isothianaphtene methine) (PIM), a new low band-gap conjugated polymer, are reported. The was studied situ during chemical p-doping (oxidation) by iodine and electrochemical n-doping (reduction). During both signs of doping, active vibrational (IRAV) bands due to strong coupling electrons lattice vibrations observed. results compared FT-Raman spectra. Electrochemical...

Helicenes are intrinsically chiral helical molecules structurally characterized by ortho-fusion of aromatic rings. A series racemic heterohelicenes composed thiophene and benzene rings alternated in the chain were prepared via photochemical irradiation. The availability large systems containing 9 11 condensed allows a better understanding both optical properties solid-state organization thiohelicene molecules. conformation crystal architecture thiohelicenes, up to show ring distortions...

Poly(dithienothiophene)s (PDTTs), low band-gap conjugated polymers with polythiophene-like chain where an aromatic thienothiophene moiety is fused to each thiophene ring, were studied using Raman spectroscopy, photoinduced infrared absorption, as well attenuated total reflection Fourier transform (ATR-FTIR) and electron spin resonance (ESR) spectroelectrochemistry. The spectroelectrochemical studies performed in situ during p- n-doping (electrochemical oxidation reduction, respectively)....

Impressive advancements in solution‐processed bulk heterojunction (BHJ) solar cells have been driven to a large extent by the rational design of conjugated polymers as photoactive donors. These achievements obtained without paying much attention green metrics parameters (such E factor) and increasing synthetic complexity (SC), which is bottleneck for industrial scalability. In this context, novel donor copolymer (PBDT3T) based on benzodithiophene terthiophene building blocks with ester...

A new dinuclear Ru(II) complex where two Ru atoms are separated by a bridge consisting of 2,1,3-benzothiadiazole acceptor moiety flanked on either side 2,5-thienyl donor units was synthesized. This rather simple appears to behave as photoactive when blended with fullerene acceptor, thus being first step toward novel bulk heterojunction solar cells, based systems.

This study reports the design and synthesis of a series D–A copolymers alternating benzothiadiazole benzotriazole acceptors to donor co-unit, investigates their photovoltaic properties in bulk heterojunction solar cells with PC71BM. Successive modifications are carried out, passing from thiophene benzodithiophene (BDT) co-units regular random alternation accepting units. A copolymer containing co-unit has reached power conversion efficiency (PCE) 1.88% optimised devices. Moving BDT leads...

The bay-substitution of perylene diimide molecules with fused aromatic rings affects both the core structure and aggregation properties. photovoltaic performance P3HT:perylene solar cells show efficiencies twofold higher than best result obtained in literature for similar devices.

Polyalkylthiophenes bearing enantiomerically pure side chains are noncentrosymmetric materials that can be used in polarized photo- and electroluminescence areas enantioselective sensing. In this work we present the characterization of a polyalkylthiophene with chiral center very close to conjugated backbone: poly-3-(S)-2-methylbutylthiophene (PMBT). Differential scanning calorimetry X-ray diffraction measurements have been performed characterize thermal transitions structural organization...