Side-Chain-Functionalized Polyacetylenes, 2. Photovoltaic Properties

Abstract

Polymerization of a functionalized acetylene was successfully performed using a Rh complex as the catalyst and triethylamine as a base yielding poly{(E,E,E)‐4‐[4‐[4‐(3,4,5‐tridodecyloxystyryl)‐2,5‐bis((S)‐2‐methylbutoxy)styryl]‐2,5‐bis((S)‐2‐methylbutoxy)styryl]phenylacetylene} (PAOPV). Films of PAOPV mixed with a fullerene derivative showed electron transfer from the OPV oligomer donor to the fullerene acceptor. The films could be furthermore used in photovoltaic devices.

Dramatic decrease of the cis content and molecular weight of cis‐transoidal polyphenylacetylene at 23 °C in solutions prepared in air

“…The mechanism by which air accelerates this process will be discussed in a subsequent publication. Because of the current interest in cis ‐transoidal PPA for designing chiral polymers based on its single‐chain helicity17–20 and cis ‐transoidal PPA with minidendritic and dendritic side groups41–46 along with other applications mentioned in the introduction to this article, the intramolecular cyclization accompanied by chain cleavage should be considered in all structural analyses and physical properties of PPA and other poly(arylacetylene)s.…”

About Supramolecular Assemblies of π-Conjugated Systems

“…The latter system could be applied in a photovoltaic device when blended with a C 60 derivative, Figure 28. 206 The full potential of pendant oligomers to construct functional organized materials was recently shown by Hayakawa et al, who created extremely regular hierarchical structures from low polydisperse copolymers of coiled polystyrene blocks with semirod polyisoprene segments bearing terthiophene side chains (88) (Figure 29). Self-organization at three different length scales occurred on films cast from CS 2 solution.…”

“…Soluble polyacetylenes with dangling terfluorenes ( 86 ) and tetra( p -phenylenevinylene)s ( 87 ) have also been prepared. The latter system could be applied in a photovoltaic device when blended with a C 60 derivative, Figure 28 Graft copolymers with pendant π-conjugated oligomers. …”

Organic Semiconductor-Containing Supramolecules: Effect of Small Molecule Crystallization and Molecular Packing

“…A number of wedge-like LC moieties have been investigated as side chains ,− and as a BCP block in wedge-coil BCPs . Donor–acceptor BCPs have been shown to form controlled nanoscopic networks of donor and acceptor materials, which is potentially useful for OPV devices. − They have also been utilized as BCP compatibilizers to control the grain sizes and enhance the thermal stability of devices when blended with unattached donor and acceptor materials . In many of the studies of LCBCPs and donor–acceptor BCPs, the ordering of the attached side chain SMs within the BCP microdomains has depended on the relative volume fraction of the LC or semiconducting block, and the variation in the molecular ordering of the attached SMs proved to be critical to the overall assembly and phase behavior of the BCP.…”