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November 11, 2025ACS Applied Materials & Interfaces

Backbone Torsion as the Limiting Factor in Charge Transport of Diketopyrrolopyrrole–Benzotriazole Donor–Acceptor Conjugated Polymer Films

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Authors

DJDo Hyeon JeongBABright Aryeh AfriyieSJSeok-Heon Jung

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Overview

Analysis reveals that increased backbone torsion reduces charge transport in DPP-BTz polymers, implying design strategies for enhanced performance.

Key Points

  • Despite tighter π-π stacking, devices exhibit lower mobilities with increased fluoroalkyl content, indicating a critical balance needed for optimal charge transport.
  • Analysis revealed that charge transport is dictated by backbone planarity, as increased torsion offsets any gains in interchain interactions.
  • Ultraviolet-visible spectroscopy and grazing incidence X-ray diffraction were employed to characterize thin films of varied DPP lactam side-chain compositions.
  • Key findings suggest the importance of conformational locking in maintaining processability while preserving intrinsic molecular properties.

Cite This Study

Jeong et al. (2025) studied this question.

synapsesocial.com/papers/69252ea3c0ce034ddc35689ahttps://doi.org/10.1021/acsami.5c19016
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Also Consider

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  1. 1Hexylation Stabilises Twisted Backbone Configurations in the Prototypical Low‐Bandgap Copolymer PCDTBT2024
  2. 2Strengthened inter‐chain π–π contacts in amorphous diketopyrrolopyrrole polymers for robust flexible organic thin‐film transistors2026
  3. 3Synthesis of fluorene‐flanked diketopyrrolopyrrole‐based semiconducting polymers with thermocleavable side chains and their application in organic field effect transistors2024 · 1 citations
  4. 4Fluorination‐Enforced Planarization for Enhanced Charge‐Transfer Stability in Cyclopentadithiophene–Benzothiadiazole Monomers2026
  5. 5Electronic structure and photostability of benzothiadiazole-based D–A–D small molecules: An integrated theoretical–experimental analysis of frontier orbital alignment, polaron reorganization, and π-conjugation effects2026