Half‐Fused Diketopyrrolopyrrole‐Based Conjugated Donor–Acceptor Polymer for Ambipolar Field‐Effect Transistors

Shi, Dandan; Liu, Zitong; Ma, Jing; Zhao, Zhiyuan; Tan, Luxi; Lin, Gaobo; Tian, Jianwu; Zhang, Xisha; Zhang, Guanxin; Zhang, Deqing

doi:10.1002/adfm.201910235

Half‐Fused Diketopyrrolopyrrole‐Based Conjugated Donor–Acceptor Polymer for Ambipolar Field‐Effect Transistors

Journal Article · Fri Mar 20 00:00:00 EDT 2020 · Advanced Functional Materials

DOI:https://doi.org/10.1002/adfm.201910235· OSTI ID:1605620

Shi, Dandan ^[1]; ^[2]; Ma, Jing ^[2]; Zhao, Zhiyuan ^[2]; Tan, Luxi ^[3]; Lin, Gaobo ^[2]; Tian, Jianwu ^[1]; Zhang, Xisha ^[2]; Zhang, Guanxin ^[2]; ^[1]

Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids CAS Center of Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China, School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids CAS Center of Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
School of Chemistry and Chemical Engineering Chongqing University Chongqing 401331 China

Abstract

A novel building block, denoted as half‐fused diketopyrrolopyrrole (DPP) (9‐(3‐octadecylhenicosyl)‐8‐(thiophen‐2‐yl)‐7 H ‐pyrrolo[3,4‐ a ]thieno[3,2‐ g ]indolizine‐7,10(9 H )‐dione), in which one of the flanking thiophene units is fused to one of the DPP rings via a carbon‐carbon double bond at the N‐position is reported. The half‐fused DPP is successfully utilized as an electron acceptor to prepare the conjugated donor–acceptor polymer PTFDFT , which exhibits ambipolar semiconducting behavior in ambient air. Theoretical calculations and absorption spectral studies show that the backbone of PTFDFT is more planar compared to the reference polymer with conventional DPP units. As a result, PTFDFT shows a narrow bandgap and low lowest unoccupied molecular orbital level. The more planar backbone with fewer side chains favors the dense packing of the polymer chains of PTFDFT with a short π–π stacking distance (3.49 Å). Grazing‐incidence wide‐angle X‐ray scattering data further confirm the predominant edge‐on packing mode of the PTFDFT polymer chains on the substrate. As expected, the PTFDFT thin film shows excellent ambipolar semiconducting properties under ambient conditions, reaching 2.23 and 1.08 cm ² V ⁻¹ s ⁻¹ for the n‐ and p‐channels, respectively. In addition, complementary‐like inverter with gain value as high as 141 is successfully constructed using the PTFDFT thin film.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1605620

Journal Information:: Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 21 Vol. 30; ISSN 1616-301X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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