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Journal of Organic & Inorganic Chemistry
ISSN 2472-1123
2
n d
E d i t i o n o f E u r o S c i C o n C o n f e r e n c e o n
Chemistry
F e b r u a r y 1 9 - 2 0 , 2 0 1 9
P r a g u e , C z e c h R e p u b l i c
Chemistry 2019
T
he aimof thisworkwas to study the effects of thenatureof the anionon thephotovoltaic properties of filmphotosemiconducting
composites (PCs) with a free surface, based on a photoconductive oligomer and symmetric cationic PDs with various anions.
The samples were prepared on the basis of a cooligomer of glycidylcarbazole with butyl glycidyl ether (GCBE) and symmetric
cationic polymethines 1–7 as shown in Figure 1. The cooligomer is characterized by hole-type conductivity and has good film
forming and optical properties. Dyes 1–7 have the same chromophore (cation) and different anions in their structure: BF4-, ClO4¯,
PF
6
¯ Cl¯, Br¯, I¯, C
6
H
4
SO
3
Me¯ (Tos¯). The samples were prepared in the form of structures with a free surface of PC films: glass
substrate/ITO/PC film, where ITO was a transparent electroconductive layer of In
2
O
3
:SnO
2
. It has been found that the nature of
the anion of cationic polymethine dyes in polymer solar cells affects phototovoltage. A study of the spectral and luminescent
properties has revealed that polymethines in these samples form contact ion pairs. It has been shown that the photovoltaic
properties of structures based on ionic organic dyes are determined not only by the chromophore structure, but also the nature
of the counter ion. The key role here is played by the redox properties of the counterion. They are responsible for its ability for
photoinduced electron transfer in ion pairs of the dyes, leading to the formation of radical species involved in photoprocesses
in solar cells. These features of ionic organic dyes should be taken into consideration in the development of photovoltaic solar
energy converters based on such dyes.
gennadiybulavko@mail.ruEffects of the anion nature of cationic
polymethine dyes on photovoltaic and spectral-
luminescent properties of thin-film polymer
photoconductive composites
Gennadiy V Bulavko
1
, Nikolay A Davidenko
1
, Nadezhda A
Derevyanko
2
and Alexander A Ishchenko
2
1
Taras Shevchenko National University of Kiev, Ukraine
2
Institute of Organic Chemistry, NAS of Ukraine, Ukraine
J Org Inorg Chem 2019, Volume: 5
DOI: 10.21767/2472-1123-C1-021