1179993-72-6Relevant academic research and scientific papers
Impact of the alkyl side chains on the optoelectronic properties of a series of photovoltaic low-band-gap copolymers
Biniek, Laure,Fall, Sadiara,Chochos, Christos L.,Anokhin, Denis V.,Ivanov, Dimitri A.,Leclerc, Nicolas,Leveque, Patrick,Heiser, Thomas
, p. 9779 - 9786 (2010)
The design of novel low-band-gap conjugated polymers with appropriate frontier orbital energy levels and good charge transport is needed to improve the conversion efficiency of organic photovoltaic devices. In this article, we describe the synthesis and structure-property relationships of a series of photovoltaic copolymers with a common conjugated backbone and differing solubilizing side chains. The copolymer optoelectronic properties and the related photovoltaic device performances are reported. Our results clearly show that the side chains have a major impact on the material and device properties. The electronic band gap can be varied by more than 0.3 eV, the charge mobilities by orders of magnitude, and the optimized fullerene content of photovoltaic devices by a factor of 4 by barely changing the side-chain positioning and/or by switching from linear to branched alkyl chains. A power conversion efficiency of 2.7% could be achieved with devices using the most promising polymer.
Investigating the effect of heteroatom substitution in 2,1,3-benzoxadiazole and 2,1,3-benzothiadiazole compounds for organic photovoltaics
Cameron, Joseph,Abed, Mahmoud Matar,Chapman, Steven J.,Findlay, Neil J.,Skabara, Peter J.,Horton, Peter N.,Coles, Simon J.
, p. 3709 - 3714 (2018/04/12)
Two new donor-acceptor-donor molecules, featuring either 2,1,3-benzothiadiazole (BT) or 2,1,3-benzoxadiazole (BO) and capped by benzofuranyl-thienyl groups, are presented. The structures of these novel compounds differ only in the identity of one heteroatom in the acceptor unit. Replacement of the sulfur atom in BT with oxygen results in a marked improvement in the performance of PC61BM blends in bulk heterojunction organic photovoltaic (BHJ OPV) devices: a 10-fold increase in PCE is observed when switching to the BO analogue. This is partly due to a preferable morphology in the donor-fullerene blends formed upon spin-coating from chlorinated solvents.
PROCESS FOR THE PREPARATION OF BENZOHETERO [ 1, 3 ] DIAZOLE COMPOUNDS DISUBSTITUTED WITH HETEROARYL GROUPS
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Page/Page column 19; 20, (2014/07/23)
Process for the preparation of a benzohetero- [1,3]diazole compound disubstituted with brominated heteroaryl groups which comprises reacting at least one dihalogenated benzohetero [1,3] diazole compound with at least one brominated heteroaryl compound. Said benzohetero [1,3] diazole compound disubstituted with brominated heteroaryl groups can be advantageously used in the synthesis of compounds useful in the construction of solar concentrators (LSCs - Luminescent Solar Concentrators ). Furthermore, said benzohetero [1,3] diazole compound disubstituted with brominated heteroaryl groups can be advantageously used in the synthesis of photoactive polymers useful in the construction of photovoltaic devices (or solar devices) such as, for example, photovoltaic cells (or solar cells), photovoltaic modules (or solar modules), on both rigid or flexible supports. Furthermore, said benzohetero [1,3] diazole compound disubstituted with brominated heteroaryl groups can be advantageously used as precursor of monomeric units in the synthesis of semiconductor polymers.
Synthesis and photovoltaic properties of two-dimensional D-A copolymers with conjugated side chains
Chen, Dugang,Yang, Yang,Zhong, Cheng,Yi, Zhengran,Wu, Fei,Qu, Li,Li, Yu,Li, Yongfang,Qin, Jingui
, p. 3852 - 3862 (2011/12/21)
Four novel two-dimensional (2D) donor-acceptor (D-A) type copolymers with different conjugated side chains, P1, P2, P3, and P4 (see Fig. 1), are designed and synthesized for the application as donor materials in polymer solar cells (PSCs). To the best of
