Polythiophenoazomethines – alternate photoactive materials for organic photovoltaics

Abstract

A solution processable all-thiophene polyazomethine used as a photoactive/donor layer in a bulk heterojunction photovoltaic device with PC60BM.

Extended benzodifuran–thiophene systems connected with azomethine junctions: synthesis and electronic properties

“…[18][19][20][21][22] As a further step in our contribution of developing donor-acceptor conjugated systems based on BDF, we report here on the synthesis and the electronic properties of extended BDF-thiophene derivatives 1a-d (Scheme 1). The electron donor ability of the thiophene units was strengthened by hexyloxy groups while electron withdrawing pentafluorophenyl, cyano and butylacetate groups were grafted on the BDF units.…”

An overview of LC polyazomethines with aliphatic–aromatic moieties: Thermal, optical, electrical and photovoltaic properties

“…Regarding polyazomethines without LC properties in the context of photovoltaic applications, some researchers proposed to use them as a donor in the active layer [67][68][69][70][71][72][73][74]. The first paper about PAZ for solar cells was published by Sharma et al [67].…”

“…On the other hand, polyazomethines synthesised from 2,5-bis(hexyloxy)-1,4-bis[(2,5-bis (hexyloxy)-4-formyl-phenylenevinylene]benzene and 4,4″-diaminop-terphenyl [71] or from 4,4 0 -diformyltriphenylamine and 4,4 0 -diaminooctafluorobiphenyl [72] with PCE values in the range of 0.02-0.04% were detected. Bolduc et al [73] received a PCE value for polyazomethines with two thiophene rings per unit equal to 0.07 and 0.22%, depending on the length of the aliphatic side chain. In our previous work [74], we proposed an applied 10-camphorsulfonic acid (CSA) as a dopant to not only improve the solubility of polyazomethine but also enhance the photovoltaic parameters of the constructed polymer solar cells and improve the morphology of the active layer.…”

“…The sample at 200 Pa and cured at 170 1C, similar to the azomethine monomer, exhibited the N phase, while the mixture at 50 and 100 Pa cured at 170 1C exhibited the isotropic phase. The authors showed that the viscosity of the A. Iwan / Renewable and Sustainable Energy Reviews 52 (2015) [65][66][67][68][69][70][71][72][73][74][75][76][77][78][79] mixture based on an azomethine monomer (see Fig. 4, structure I) strongly decreased (by three orders of magnitude) when the solid epoxy was melted into the LC phase, and the process was reversible (viscosity increase again due to the curing) [45].…”

Amphiphilic polypyrrole-poly(Schiff base) copolymers with poly(ethylene glycol) side chains: synthesis, properties and applications

“…On the other hand, PSB are recognized ICPs 42,43 with potential application areas ranging from LED devices, 44 organic photovoltaics (OPV), 45 and electrochromic devices (ECD) 46 to organic field effect transistors (OFET) 47 and chemosensors. 48 In a series of reported studies on chemical and electrochemical syntheses of several bis( pyrrole) Schiff bases, 49,50 investigations of their properties revealed that their electrical conductivities, 49 redox properties 51 and behaviour in electrochemical polymerization 52 are similar to those of polypyrrole.…”