Category: 303734-52-3

Xiao, Yang published the artcileThermally stable red electroluminescent hybrid polymers derived from functionalized silsesquioxane and 4,7-bis(3-ethylhexyl-2-thienyl)-2,1,3-benzothiadiazole, Synthetic Route of 303734-52-3, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2009), 47(21), 5661-5670, database is CAplus.

Hyperbranched organic-inorganic hybrid conjugated polymers P1 and P2 were prepared via FeCl₃-oxidative polymerization of 4,7-bis(3-ethylhexyl-2-thienyl)-2,1,3-benzothiadiazole (A) and octa(3-ethylhexyl-2-thienyl-phenyl)polyhedral oligomeric silsesquioxane (POSS) (B) at different POSS concentrations Compared to linear polymer PM derived from A, P1, and P2 exhibit much higher PL quantum efficiency (ϕ_PL-f) in condensed state with improved thermal stability. ϕ_PL-f of P1 and P2 increased by 80% and 400%, and the thermal degradation temperatures of P1 and P2 are increased by 35° and 46°, resp. Light-emitting diodes were fabricated using P1, P2, and PM. While the electroluminescent spectra of both P1 and PM show λ_max at 660 nm, P1 exhibits a much narrower EL spectrum and higher electroluminescence (∼500%) compared with PM at a same voltage and film thickness. The maximum current efficiency of P1 is more than seven times of that of PM. The turn-on voltages of the LEDs are in the order of P2>PM>P1. LED prepared by blending P1 with MEH-PPV shows a maximum luminescence of 2.6 × 10³ cd/m² and a current efficiency of 1.40 cd/A, which are more than twice (1.1 × 10³ cd/m²) and five times (0.27 cd/A) of LED of PM/MEH-PPV blend, resp.

Journal of Polymer Science, Part A: 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 C14H31NO2, Synthetic Route of 303734-52-3.

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

Chen, Hung-Yang published the artcilePolymer side-chain substituents elucidate thermochromism of benzodithiophene-dithiophenylacrylonitrile copolymers – polymer solubility correlation of thermochromism and photovoltaic performance, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is Polymer Chemistry (2017), 8(24), 3689-3701, database is CAplus.

Nine pBCNx polymers based on a donor-π-acceptor benzo[1,2-b:4,5-b’]dithiophene-(E)-2,3-di(thiophen-2-yl)acrylonitrile main-chain structure and n-octyl/2-ethylhexyl as the side-chain substituents have been designed and synthesized. The thermochromism of the pBCNx polymers has been carefully examined in both solution and the thin-film state. With addnl. evidences from Raman spectroscopy and AFM microscopy, we have deciphered the varied colors of nine pBCNx polymers in solution and the pronounced thin-film thermochromism only observed for certain pBCNx polymers, i.e., pBCN4, pBCN5, pBCN6, and pBCN8. The alkyl side-chain, and hence the solubility or aggregation of pBCNx polymers, is a main factor of the varied color in solution and the varied thermochromism in the thin film. We have identified that a stronger main-chain and main-chain interaction are present on the (E)-2,3-di(thiophen-2-yl)acrylonitrile moiety, whereas the poor to moderate solubility pBCN3, pBCN5′ and pBCN7 exhibit pronounced thermochromism in solution, and pBCN4, pBCN5, pBCN6 and pBCN8 are four polymers which have good solubility in solution and show thermochromism in the thin-film state. We took navy blue pBCN3 (poor solubility), magenta pBCN4 (good solubility), and reddish purple pBCN5′ (moderate solubility) for the fabrication of bulk heterojunction organic photovoltaics (OPVs). With a solvent annealing treatment, the power conversion efficiency of the OPVs has been improved significantly from 4.7% to 6.2% for the good solubility pBCN4, but there is little and no improvement for the moderate solubility pBCN5′ and poor solubility pBCN3, resp. Our study verifies that the good OPV performance of the pBCNx polymers can be correlated to the pronounced thin-film thermochromism. A good solubility of the polymer is a common characteristic of a material with significant thin-film thermochromism and good OPV performance.

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 C12H19BrS, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene.

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

Kim, Na Young published the artcileEnhanced doping efficiency and thermoelectric performance of diketopyrrolopyrrole-based conjugated polymers with extended thiophene donors, Computed Properties of 303734-52-3, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2021), 9(1), 340-347, database is CAplus.

The design of polymer backbones suitable for improving doping efficiency can provide a new direction in enhancing charge transport and thermoelec. performance. However, their optimizations are still unclear. Herein, the synthesis of a new diketopyrrolopyrrole (DPP)-based conjugated polymer with eight thiophene groups in a repeat unit, EHT6-20DPP, was reported for the improvement of thermoelec. properties. Compared to other DPP-based polymers with a different number of thiophene groups, EHT6-20DPP exhibits higher doping efficiency when doped with a p-type dopant, FeCl₃, owing to its higher number of thiophene groups as electron donating units. The optimum elec. conductivity and power factor of the doped EHT6-20DPP were found to be 93.28 S cm^-1 and 56.73μW m^-1 K^-2, which are higher than the reference DPP-based polymer with three thiophene groups in a repeat unit. The relationship between the thermoelec. properties is demonstrated using a charge transport model, suggesting that doped EHT6-20DPP has good charge transport properties in terms of polymer backbone engineering. The results of the present work could provide insights into the optimal polymer backbone design for excellent thermoelec. properties.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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 C12H19BrS, Computed Properties of 303734-52-3.

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

Cho, Yongjoon published the artcileDithienogermole-Based Nonfullerene Acceptors: Roles of the Side-Chains′ Direction and Development of Green-Tinted Efficient Semitransparent Organic Solar Cells, Safety of 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is ACS Applied Energy Materials (2020), 3(8), 7689-7698, database is CAplus.

Inspired by the encouraging properties of Ge-fused heterocyclic dithienogermole (DTG) in optoelectronic applications, we here report two narrow-bandgap acceptor-donor′-donor-donor′-acceptor (A-D′-D-D′-A)-type isomeric nonfullerene acceptors based on DTG (DTG-IW with inward-facing side chains vs DTG-OW with outward-facing side chains) for use in organic solar cells (OSCs). The introduction of the inward-facing side chains into the backbone results in extremely confined face-on crystallites in the solid state, as verified by grazing-incidence wide-angle X-ray scattering measurements. This result is attributed mainly to a better power conversion efficiency (PCE) of 9.16% in the OSC based on a blend of DTG-IW with a narrow-bandgap PTB7-Th donor polymer, as compared with the corresponding DTG-OW-based one. Furthermore, the appealing feature of the blend mixing of the narrow-bandgap donor and acceptor pair is that it enables the construction of a green-tinted efficient semitransparent OSC with a PCE of 6.19% and transmittance of 50.4% in the green wavelength region through incorporation of the recently formulated semitransparent Ag/Sb₂O₃/Ag electrode. Overall, in addition to providing useful perspectives into the side-chain engineering of nonfullerene acceptors, this work highlights that OSC based on the A-D′-D-D′-A-type DTG is a promising narrow-bandgap acceptor for further improvement of the performance of semitransparent OSCs.

ACS Applied Energy Materials 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 C12H19BrS, Safety of 2-Bromo-3-(2-ethylhexyl)thiophene.

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

Bicciocchi, Erika published the artcileAn Alternating Donor-Acceptor Conjugated Polymer Based on Benzodithiophene and [3,4-c]pyrrole-4,6-dione: Synthesis, Characterization, and Application in Photovoltaic Devices, HPLC of Formula: 303734-52-3, the publication is Australian Journal of Chemistry (2015), 68(11), 1773-1782, database is CAplus.

The synthesis is described of a new alternating donor-acceptor semiconducting polymer based on an N-octylthieno[3,4-c]pyrrole-4,6-dione building block together with a newly designed 2,3-bis(2-ethylhexyl)thiophenylethynyl substituted benzodithiophene (BDT). The introduction of electron-rich thiophene units to BDT raises the HOMO level of the conjugated polymer and the concomitant reduction of the bandgap enhances the harvesting of solar radiation. This modification also introduces less sterically demanding triple bonds, thereby potentially enabling more favorable mol. interactions and an extra dimension of conjugation perpendicular to the main polymer chain. The optoelectronic properties of this new conjugated polymer were evaluated using UV-visible absorption and fluorescence spectroscopy, photoelectron spectroscopy in air, photo-induced charge extraction by linearly increasing voltage (Photo-CELIV), and d. functional theory calculations The polymer absorbs broadly in the wavelength range 300-700 nm in solution and the solid state. The estimated HOMO and LUMO levels of -5.4 and -3.6eV, resp., correspond to a bandgap of 1.8eV. Photovoltaic devices fabricated using the polymer as the active layer displayed power conversion efficiencies (PCEs) of up to 1%. Photo-CELIV results provide evidence that rapid recombination and poor charge mobility are likely contributing factors to the relatively low PCE values observed

Australian Journal of 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 C12H19BrS, HPLC of Formula: 303734-52-3.

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

Yu, Yingjian published the artcileA p-π* conjugated triarylborane as an alcohol-processable n-type semiconductor for organic optoelectronic devices, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2019), 7(24), 7427-7432, database is CAplus.

A p-π* conjugated organic mol. based on triarylborane is reported as n-type organic semiconductor with unique alc. solubility Its favorable alc. solubility even in the absence of polar side chains is mainly due to the large dipole moment and enhanced flexibility of the conjugated backbone once the boron atom is embedded. The p-π* conjugation directly affects the electronic structure as the LUMO is fully delocalized, including the boron atom, whereas the HOMO has the boron atom residing on a node. As a result, the mol. exhibits low-lying LUMO/HOMO energy levels of -3.61 eV/-5.73 eV paired with a good electron mobility of 1.37 × 10^-5 cm² V^-1 s^-1. Its application as an electron acceptor is demonstrated in alc.-processed organic solar cells (OSCs). This p-π* conjugated mol. is the first alc.-processable non-fullerene electron acceptor, a feature that is in strong demand for environmentally friendly processing of OSCs.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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 C13H16O2, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene.

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