Isomers of n-Type Poly(thiophene-alt-co-thiazole) for Organic Thermoelectrics DOI
Xinyi Fan,

Sihui Deng,

Xu Cao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(35), P. 46741 - 46749

Published: Aug. 20, 2024

n-Type polythiophene represents a promising category of n-type polymer thermoelectric materials known for their straightforward structure and scalable synthesis. However, often suffers from twisted backbone poor stacking property when introducing high-density electron-withdrawing groups lower lowest unoccupied molecular orbital (LUMO) level, which is considered to be beneficial n-doping efficiency. Herein, we developed two isomers derivatives, PTTz1 PTTz2, by inserting thiazole units into the composed thieno[3,4-c]pyrrole-4,6-dione (TPD) thiophene-3,4-dicarbonitrile (2CNT). Although PTTz2 share similar skeleton, they differ in configuration, with nitrogen atoms oriented toward TPD 2CNT, respectively. The insertion significantly planarizes while largely preserving low LUMO levels. Notably, exhibits more coplanar closer π-stacking compared PTTz1, resulting greatly enhanced electron mobility. Both can easily n-doped due deep demonstrates superior performance, an electrical conductivity 50.3 S cm–1 power factor 23.8 μW m–1 K–2, approximately double that PTTz1. This study highlights impact unit on derivatives provides valuable guidelines design high-performance materials.

Language: Английский

Molecular Doping-Driven Modulation of Domain Charge Transport Elevates Thermoelectric Performance in Polar Polythiophene DOI

Kaiqing Lu,

Chen Chen, Jingliang Cheng

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(9), P. 4351 - 4359

Published: Aug. 21, 2024

Unlocking outstanding thermoelectric performance in conjugated polymers (CPs) hinges on overcoming their intrinsically low charge mobility, resulting from mixed crystalline–amorphous nature. Central to this challenge is achieve synergistic intra- and interdomain transport doped CPs. Taking polar polythiophene p(g32T-T) as a model system, we demonstrate that ion exchange doping synergistically improves across both ordered disordered regions, establishing power factor of 63 μW m–1 K–2, considerable leap forward for polythiophenes. We highlight excess induced solid-state molecular reorientation edge-on face-on, initiating decline mobility within crystalline domains, despite improvements transport. Furthermore, showcase quantitative methodology probe efficiency, taking activation energy Wγ derived weighted key indicator. This study delineates sophisticated framework examining transport, underscoring the importance fine-tuning amorphous regions.

Language: Английский

Citations

2
Isomers of n-Type Poly(thiophene-alt-co-thiazole) for Organic Thermoelectrics DOI
Xinyi Fan,

Sihui Deng,

Xu Cao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(35), P. 46741 - 46749

Published: Aug. 20, 2024

n-Type polythiophene represents a promising category of n-type polymer thermoelectric materials known for their straightforward structure and scalable synthesis. However, often suffers from twisted backbone poor stacking property when introducing high-density electron-withdrawing groups lower lowest unoccupied molecular orbital (LUMO) level, which is considered to be beneficial n-doping efficiency. Herein, we developed two isomers derivatives, PTTz1 PTTz2, by inserting thiazole units into the composed thieno[3,4-c]pyrrole-4,6-dione (TPD) thiophene-3,4-dicarbonitrile (2CNT). Although PTTz2 share similar skeleton, they differ in configuration, with nitrogen atoms oriented toward TPD 2CNT, respectively. The insertion significantly planarizes while largely preserving low LUMO levels. Notably, exhibits more coplanar closer π-stacking compared PTTz1, resulting greatly enhanced electron mobility. Both can easily n-doped due deep demonstrates superior performance, an electrical conductivity 50.3 S cm–1 power factor 23.8 μW m–1 K–2, approximately double that PTTz1. This study highlights impact unit on derivatives provides valuable guidelines design high-performance materials.

Language: Английский

Citations

0