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

Sihui Deng,

Xu Cao

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(35), С. 46741 - 46749

Опубликована: Авг. 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.

Язык: Английский

Cyano-functionalized pyrazine: an electron-deficient unit as a solid additive enables binary organic solar cells with 19.67% efficiency DOI

Lijun Tu,

Hao Wang,

Weixu Duan

и другие.

Energy & Environmental Science, Год журнала: 2024, Номер 17(10), С. 3365 - 3374

Опубликована: Янв. 1, 2024

A strong electron-deficient unit CNPz as a solid additive was developed in PTQ10/ m -BTP-PhC6 binary organic solar cells. high PCE of 19.67% achieved with significant increase the J SC and FF (81.8%).

Язык: Английский

Процитировано

39
Recent developments in polymer semiconductors with excellent electron transport performances DOI
Yunchao Zhang, Weifeng Zhang, Zhihui Chen

и другие.

Chemical Society Reviews, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This review describes the design considerations, bonding modes between monomers, structural modification strategies, and applications of polymer semiconductors with excellent electron transport performances.

Язык: Английский

Процитировано

3
A High‐Mobility n‐Type Noncovalently‐Fused‐Ring Polymer for High‐Performance Organic Thermoelectrics DOI

Tao Shen,

Di Liu, Jianqi Zhang

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(35)

Опубликована: Июнь 10, 2024

Conjugated polymers are emerging as competitive candidates for organic thermoelectrics (OTEs). However, to make the device truly pervasive, both p- and n-type conjugated essential. Despite great efforts, no equivalents p-type benchmark PEDOT:PSS exist date mainly due low electrical conductivity (σ). Herein, a near-amorphous polymer, namely pDFSe, is reported with high σ by achieving synergy between charge transport doping efficiency. The polymer pDFSe synthesized based on an acceptor-triad moiety of diketopyrrolopyrrole-difluorobenzoselenadiazole-diketopyrrolopyrrole (DFSe), which has noncovalently-fused-ring structure reinforce backbone rigidity. Furthermore, axisymmetric thiophene-selenophene-thiophene donor introduced, enables formation microstructures. above merits ensure good efficiency without scarifying efficient intrachain charge-carrier transport. Thus, pDFSe-based transistors exhibit electron mobility up 6.15 cm

Язык: Английский

Процитировано

7
Realizing an N-Type Organic Thermoelectric ZT of 0.46 DOI

Mingyu Ma,

Gang Ye, Soyeong Jang

и другие.

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 1813 - 1820

Опубликована: Март 19, 2025

Язык: Английский

Процитировано

1
Rational Molecular Design of Diketopyrrolopyrrole‐Based n‐Type and Ambipolar Polymer Semiconductors DOI
Tao Shen, Zhen Jiang, Yang Wang

и другие.

Chemistry - A European Journal, Год журнала: 2024, Номер 30(47)

Опубликована: Июль 31, 2024

Abstract Diketopyrrolopyrrole (DPP)‐based polymer semiconductors have drawn great attention in the field of organic electronics due to planar structure, decent solubilizing capability, and high crystallinity. However, electron‐deficient capacity DPP derivatives are not strong enough, leading relatively high‐lying lowest unoccupied molecular orbital (LUMO) energy levels corresponding polymers. As a result, n‐type ambipolar DPP‐based polymers rare their electron mobilities also lag far behind p‐type counterparts, which limits development important p‐n‐junction‐based electronic devices. Therefore, new design strategies been proposed recent years develop n‐type/ambipolar with improved performances. In this view, these summarized, including copolymerization different acceptors weak donors, flanked aromatic ring modification, DPP‐core expansion dimerization. The relationship between chemical structures thin‐film transistor performances is intensively discussed. Finally, perspective on future trends proposed.

Язык: Английский

Процитировано

6
Exploring Pyrazine‐Based Organic Redox Couples for Enhanced Thermoelectric Performance in Wearable Energy Harvesters DOI

Chia‐Yu Lee,

Ching‐Chieh Hsu,

Chia‐Hsin Wang

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 2, 2024

Abstract Thermoelectric generators (TEGs) based on thermogalvanic cells can convert low‐temperature waste heat into electricity. Organic redox couples are well‐suited for wearable devices due to their nontoxicity and the potential enhance ionic Seebeck coefficient through functional‐group modifications. Pyrazine‐based organic with different functional groups is comparatively analyzed cyclic voltammetry under varying temperatures. The results reveal substantial differences in entropy changes temperature highlight 2,5‐pyrazinedicarboxylic acid dihydrate (PDCA) as optimal candidate. How of pyrazine compounds impact examined, by calculating electrostatic density theory. To evaluate thermoelectric properties, PDCA integrated concentrations a double‐network hydrogel comprising poly(vinyl alcohol) polyacrylamide. resulting champion device exhibits an impressive ( S i ) 2.99 mV K −1 , thermal conductivities ≈67.6 µS cm ≈0.49 W m respectively. Finally, TEG constructed connecting 36 pieces 20 × 10 −3 PDCA‐soaked series. It achieves maximum power output ≈0.28 µW gradient 28.3 °C small light‐emitting diode. These findings significant TEGs devices.

Язык: Английский

Процитировано

3
N‐oxide‐Functionalized Bipyridines as Strong Electron‐Deficient Units to Construct High‐Performance n‐Type Conjugated Polymers DOI Creative Commons
Mingwei Li, Wenhao Li,

Junkang Zhou

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 13, 2025

Abstract Developing low‐cost unipolar n‐type organic thin‐film transistors (OTFTs) is necessary for logic circuits. To achieve this objective, the usage of new electron‐deficient building blocks with simple structure and easy synthetic route desirable. Among all units, N ‐oxide‐functionalized bipyridines can be prepared through a oxidized transformation bipyridines. However, employing as unit to construct efficient N‐type polymers has been overlooked. This gap strongly encourages us design synthesize two ‐oxide blocks, 5,5'‐dibromo‐[2,2'‐bipyridine] 1‐oxide (BPyO) 1,1'‐dioxide (BPyDO), oxidation sp 2 ‐ in 2,2ʹ‐bipyridine. The single‐crystal X‐ray diffraction shows that BPyO BPyDO possess planar strong π‐stacking, which beneficial charge transport. Incorporation these into acceptor–acceptor backbones leads polymers, namely P(DPP‐BPyO) P(DPP‐BPyDO). Both P(DPP‐BPyDO) lower frontier molecular orbital energy levels than non‐oxide polymer P(DPP‐BPy). Consequently, transition from P(DPP‐BPy) (without oxide group) (mono‐oxide then (dioxide decrease hole‐transport performance gradually switch transport nature p‐type via ambipolar. These results prove introduction groups units would promising strategy approach high‐performance polymers.

Язык: Английский

Процитировано

0
High‐Performance n‐Type Semiconducting Polymers via Synergistic Heteroannulated Acceptor Dimerization and Direct Arylation Polymerization DOI Open Access
Di Liu,

Ying‐Han Zhao,

Shaojie Chen

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 25, 2025

Abstract Developing unipolar n‐type semiconducting polymers with electron mobility ( µ e ) exceeding 10 cm 2 V −1 s presents a significant challenge in organic electronics. In response to this challenge, novel molecular architecture‐tailoring approach known as the heteroannulated acceptor dimerization strategy is introduced. Through theoretical framework that integrates heteroatom substitution and based on parent hexylthiophene‐flanked benzothiadiazole, our establishes modulate frontier orbital (FMO) levels while enhancing planarity. The removal of alkyl side chains flanking thiophene units leads more planar polymer backbone, evidenced by dihedral angles 0°. prediction deeper FMO oxadiazole‐containing experimentally validated, demonstrating efficacy design principles. Using strategy, new copolymers are synthesized via modified palladium/copper co‐catalyzed direct arylation polymerization protocol 10‐gram scale. Compared its hexylthiophene‐counterpart pN‐BBOE‐C6, pN‐BBOE‐H exhibits exceptional structural electronic properties, including π–π stacking distance 3.5 Å 11.2 , among highest for polymers. This work not only advances understanding materials but also provides robust designing high‐performance

Язык: Английский

Процитировано

0
Naphtho[2,3-b]thiophene diimide-terminated acceptor triads for improved n-type organic semiconductors DOI

Shuixin Zhang,

Zeng Wu,

Di Liu

и другие.

Science China Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 27, 2025

Язык: Английский

Процитировано

0
n‑Type Polymer Thermoelectric Materials Based on Benzodifurandione and F‐Substituted Thiophene Derivatives Synthesized via Direct Arylation and Aldol Polycondensation DOI

Ruoqi Gao,

Yuqi Guo, Chenhui Xu

и другие.

Macromolecular Chemistry and Physics, Год журнала: 2025, Номер unknown

Опубликована: Май 7, 2025

Abstract The preparation of n‐type conjugated polymers (CPs) with low‐lying lowest unoccupied molecular orbital (LUMO) energy levels is crucial for developing organic electronics. However, limited strategies have been demonstrated to significantly lower the LUMO CPs. Herein, BDOPV incorporated strong electron affinity as acceptor unit and F‐substituted thiophene derivatives 4F2T 4FTVT donor into polymer chain, two CPs PB4F2T PB4FTVT are synthesized via an atom‐economic direct arylation monomer‐aldol polycondensation procedure. display below −4.0 eV enable unipolar charge transport characteristics in thin‐film transistors (OTFTs) facilitate efficient n‐doping by N ‐DMBI thermoelectric devices (OTEs). OTEs fabricated using enhanced performance, a conductivity (σ) 0.90 S cm⁻¹ power factor (PF) reaching up 0.50 µW m⁻¹ K⁻ 2 . This work enriches pool semiconductors combining withdrawing fluorinated comonomer effective synthetic protocol.

Язык: Английский

Процитировано

0