Tag: M.W=700-800

Li, Hui published the artcileSingle-Solution Doping Enabling Dominant Integer Charge Transfer for Synergistically Improved Carrier Concentration and Mobility in Donor-Acceptor Polymers, Related Products of thiazole, the publication is Advanced Functional Materials (2022), 32(14), 2110047, database is CAplus.

Chem. doping of donor-acceptor (D-A) polymers is essential for their usage in highly efficient optoelectronic devices. The crucial challenge remains to synergistically improve the carrier concentration and mobility of these polymers via a single solution doping method. Here, a D-A polymer, Pg₃2T-OTz is designed and synthesized, containing a weak-acceptor-strong-donor backbone with nonpolar (alkoxy) and polar (ethylene glycol) side chains. Pure integer charge transfer (ICT) is shown to occur in 2,3,5,6-tetrafluoro-tetracyanoquinodimethane (F4TCNQ)-doped D-A polymer at a low doping level. It is shown that the ordered edge-on orientations of ICT structures overcome the Coulomb interactions and endow a long-range hole delocalization, while few charge transfer complex states form in amorphous regions and bridge the crystalline ICT structures at high doping level, creating a network that sustains efficient charge transport. As a result, simultaneously high carrier concentration and high mobility are realized for F4TCNQ-doped Pg₃2T-OTz and thus a high elec. conductivity up to 550 S cm^-1 is approached, which is the highest value among any doped polymers via a single-solution doping process. This work demonstrates that the modulation of the acceptor strength combined with side-chain engineering is an effective mol. design strategy to promote both the doping efficiency and carrier transport property of D-A polymers.

Advanced Functional Materials published new progress about 2215018-37-2. 2215018-37-2 belongs to thiazole, auxiliary class Thiazoles, name is 4,4′-Bis(octyloxy)-2,2′-bis(trimethylstannyl)-5,5′-bithiazole, and the molecular formula is C28H52N2O2S2Sn2, Related Products of thiazole.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica

Liu, Jian published the artcileAmphipathic Side Chain of a Conjugated Polymer Optimizes Dopant Location toward Efficient N-Type Organic Thermoelectrics, Category: thiazole, the publication is Advanced Materials (Weinheim, Germany) (2021), 33(4), 2006694, database is CAplus and MEDLINE.

There is no mol. strategy for selectively increasing the Seebeck coefficient without reducing the elec. conductivity for organic thermoelecs. Here, it is reported that the use of amphipathic side chains in an n-type donor-acceptor copolymer can selectively increase the Seebeck coefficient and thus increase the power factor by a factor of ≈5. The amphipathic side chain contains an alkyl chain segment as a spacer between the polymer backbone and an ethylene glycol type chain segment. The use of this alkyl spacer does not only reduce the energetic disorder in the conjugated polymer film but can also properly control the dopant sites away from the backbone, which minimizes the adverse influence of counterions. As confirmed by kinetic Monte Carlo simulations with the host-dopant distance as the only variable, a reduced Coulombic interaction resulting from a larger host-dopant distance contributes to a higher Seebeck coefficient for a given elec. conductivity Finally, an optimized power factor of 18 μW m^-1 K^-2 is achieved in the doped polymer film. This work provides a facile mol. strategy for selectively improving the Seebeck coefficient and opens up a new route for optimizing the dopant location toward realizing better n-type polymeric thermoelecs.

Advanced Materials (Weinheim, Germany) published new progress about 2215018-37-2. 2215018-37-2 belongs to thiazole, auxiliary class Thiazoles, name is 4,4′-Bis(octyloxy)-2,2′-bis(trimethylstannyl)-5,5′-bithiazole, and the molecular formula is C28H52N2O2S2Sn2, Category: thiazole.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica

Yu, Jianwei published the artcile2,1,3-Benzothiadiazole-5,6-dicarboxylicimide-Based Polymer Semiconductors for Organic Thin-Film Transistors and Polymer Solar Cells, Category: thiazole, the publication is ACS Applied Materials & Interfaces (2017), 9(48), 42167-42178, database is CAplus and MEDLINE.

A series of polymer semiconductors incorporating 2,1,3-benzothiadiazole-5,6-dicarboxylicimide (BTZI) as strong electron-withdrawing unit and an alkoxy-functionalized head-to-head linkage containing bithiophene or bithiazole as highly electron-rich co-unit are designed and synthesized. Because of the strong intramol. charge transfer characteristics, all three polymers BTZI-TRTOR (P1), BTZI-BTOR (P2), and BTZI-BTzOR (P3) exhibit narrow bandgaps of 1.13, 1.05, and 0.92 eV, resp., resulting in a very broad absorption ranging from 350 to 1400 nm. The highly electron-deficient 2,1,3-benzothiadiazole-5,6-dicarboxylicimide and alkoxy-functionalized bithiophene (or thiazole) lead to polymers with low-lying lowest unoccupied MOs (-3.96 to -4.28 eV) and high-lying highest occupied MOs (-5.01 to -5.20 eV). Hence, P1 and P3 show substantial and balanced ambipolar transport with electron mobilities/hole mobilities of up to 0.86/0.51 and 0.95/0.50 cm² V^-1 s^-1, resp., and polymer P2 containing the strongest donor unit exhibited unipolar p-type performance with an average hole mobility of 0.40 cm² V^-1 s^-1 in top-gate/bottom-contact thin-film transistors with gold as the source and drain electrodes. When incorporated into bulk heterojunction polymer solar cells, the narrow bandgap (1.13 eV) polymer P1 shows an encouraging power conversion efficiency of 4.15% with a relatively large open-circuit voltage of 0.69 V, which corresponds to a remarkably small energy loss of 0.44 eV. The power conversion efficiency of P1 is among the highest reported to date with such a small energy loss in polymer:fullerene solar cells.

ACS Applied Materials & Interfaces published new progress about 2215018-37-2. 2215018-37-2 belongs to thiazole, auxiliary class Thiazoles, name is 4,4′-Bis(octyloxy)-2,2′-bis(trimethylstannyl)-5,5′-bithiazole, and the molecular formula is C9H13NO2, Category: thiazole.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica

Chen, Zhicai published the artcileImide-Functionalized Fluorenone and Its Cyanated Derivative Based n-Type Polymers: Synthesis, Structure-Property Correlations, and Thin-Film Transistor Performance, Safety of 4,4′-Bis(octyloxy)-2,2′-bis(trimethylstannyl)-5,5′-bithiazole, the publication is Angewandte Chemie, International Edition (2022), 61(32), e202205315, database is CAplus and MEDLINE.

The development of high-performance n-type polymer semiconductors is powered by the design and synthesis of electron-deficient building blocks with optimized physicochem. properties. By meticulously installing an imide group onto fluorene and its cyanated derivative, we report here two very electron-deficient building blocks, imide-functionalized fluorenone (FOI) and its cyanated derivative (FCNI), both featuring a deep-lying LUMO energy level down to -4.05 eV and highly coplanar framework, endowing them ideal units for constructing n-type polymers. Thus, a series of polymers are built from them, exhibiting unipolar n-type transport character with a highest electron mobility of 0.11 cm² V^-1 s^-1. Hence, FOI and FCNI offer a remarkable platform for accessing high-performance n-type polymers and the imide functionalization of appropriate (hetero)arenes is a powerful strategy for developing polymers with deep-lying LUMOs for n-type organic electronics.

Angewandte Chemie, International Edition published new progress about 2215018-37-2. 2215018-37-2 belongs to thiazole, auxiliary class Thiazoles, name is 4,4′-Bis(octyloxy)-2,2′-bis(trimethylstannyl)-5,5′-bithiazole, and the molecular formula is C28H52N2O2S2Sn2, Safety of 4,4′-Bis(octyloxy)-2,2′-bis(trimethylstannyl)-5,5′-bithiazole.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica