Involvement of halogen and polyaromatic substituents in chalcone derivatives as dye sensitizers in solar cell applications

Abstract

A series of pyrenyl and halogenated chalcone (PyBr and PyF) derivatives have been constructed for the dye-sensitized solar cell (DSSC) application by proposing different substituent groups. The compounds were synthesized...

Nonlinear optical-active ferrocene conjugated Y-shaped imidazole donor–π–acceptor [(D–π)2–IM–π–A] compounds for dye-sensitized solar cells using non-corrosive copper complexes as a redox mediator

“…From a general point of view we can say that the widely used I − /I 3 − redox mediator can cause some problems among which the most important are: the long-term stability of the devices, compromised by the corrosive power of the oxidant I 2 towards the sealing material and the competition with the dye in the light harvesting, due to the absorption characteristics of I 3 − . 32,55 To overcome these problems, some non-corrosive Cu( i )/Cu( ii ) redox couples have been proposed for DSSCs, leading to a fast electron exchange. 35 The results of the investigated DSSCs are presented in Table 3 together with those obtained with the Ru( ii ) benchmark N719; in the same table, the details of the composition of the electrolyte solutions employed are also reported whereas the corresponding ( J–V ) curves are shown in Fig.…”

“…Generally, the I − /I 3 − redox couple is used as a redox mediator in DSSCs, 32 but this couple has some drawbacks, for example I 2 is volatile and its long-term cell sealing is quite complicated. The I 3 − reduction at the counter electrode is obtained by the DSSC cathode only by the platinum coating, but it is unstable, and it faces photovoltage loss due to the mismatching with the dye redox potential.…”

Studies in the influence of D–π–A pyrenyl chalcone containing methoxy substitution as dye-sensitizer in DSSC

“…Chalcone derivative is fundamentally build by the attachment of conjugated carbonyl system and two aromatic rings [1]. Chalcone is known as 1,3-diarylprop-2-en-1-one which is a main constituent of various natural produces because it is mainly found in the edible plant [2]. The research on πconjugated chalcone is broadly investigated in the optoelectronic industry due to the efficient properties of charge transfer between the molecules [3,4].…”

“…The research on πconjugated chalcone is broadly investigated in the optoelectronic industry due to the efficient properties of charge transfer between the molecules [3,4]. Due to the potentiality of chalcone derivative, several recent studies have implemented chalcone as the sensitizer material for dyesensitized solar cell (DSSC) applications [2,4,5,6,7].…”

“…In recent times, DSSC is a 3rd generation of solar cells which developed expeditiously due to their advantages of better cell efficiency, simple fabrication technique and environmentally safe compared to the other generations of solar cells [2]. DSSC converts light energy into electrical energy through dye-sensitizer as the essential materials in retaining the high performance as a replacement for p-n junctions [7].…”