Wang, Hsing-Ju's team published research in Polymer Chemistry in 4

Wang, Hsing-Ju published the artcileNovel polythiophene derivatives functionalized with conjugated side-chain pendants comprising triphenylamine/carbazole moieties for photovoltaic cell applications, COA of Formula: C12H19BrS, the publication is Polymer Chemistry (2013), 4(3), 506-519, database is CAplus.

We synthesized a series of polythiophenes (PTs) featuring 2-ethylhexyl-substituted terthiophene (T) or quaterthiophene (BT) as the conjugated unit in the polymer backbone with pendant conjugated tert-butyl-substituted triphenylamine (tTPA)- or carbazole (tCz)-containing moieties as side chains, namely PTtTPA, PBTtTPA, PTtCz and PBTtCz. Incorporating T and BT moieties into the polymer backbone and attaching tTPA or tCz units promoted efficient conjugation within the extended conjugated frameworks of the polymers, resulting in lower band-gap energies and red-shifting of the maximal UV-Vis absorption wavelength. The higher electron-donating ability of tTPA resulted in broader absorption bands and lower band-gap energies of PTtTPA and PBTtTPA as compared with PTtCz and PBTtCz. Incorporation of the T and BT moieties into the polymer backbone enhanced the compatibility of PT and the fullerene derivative by reducing the side-chain d. of PT, thus providing sufficient free volume for efficient incorporation of [6,6]phenyl-C₆₁-butyric acid Me ester (PC₆₁BM) into the polymer chains. Polymer solar cells (PSCs) were fabricated by spin-coating a blend of each PT with the fullerene derivative (PC₆₁BM) as a composite film-type photoactive layer; PBTtTPA/PC₆₁BM-based PSCs showed superior photovoltaic (PV) performance to PTtTPA/PC₆₁BM-based PSCs in terms of conjugation and absorption band broadness. However, PBTtCz/PC₆₁BM-based PSCs showed inferior PV performance to PTtCz/PC₆₁BM-based PSCs. The lower HOMO level led to a higher open-circuit voltage (V_oc; 0.74 V) and larger photo-energy conversion efficiency (η; 2.77%) of PTtCz/PC₆₁BM-based PSCs.

Polymer Chemistry published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C8H5F3N4, COA of Formula: C12H19BrS.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary