Version 1
: Received: 29 April 2024 / Approved: 29 April 2024 / Online: 29 April 2024 (10:34:47 CEST)
How to cite:
Gaurav, K. V.; Rai, H.; Singh, K. R.; Sharma, S.; Ando, Y.; PANDEY, S. S. Clarifying the Dominant Role of Crystallinity and Molecular Orientation in Differently Processed Thin Films Regioregular poly(3-Hexylthiophene). Preprints2024, 2024041914. https://doi.org/10.20944/preprints202404.1914.v1
Gaurav, K. V.; Rai, H.; Singh, K. R.; Sharma, S.; Ando, Y.; PANDEY, S. S. Clarifying the Dominant Role of Crystallinity and Molecular Orientation in Differently Processed Thin Films Regioregular poly(3-Hexylthiophene). Preprints 2024, 2024041914. https://doi.org/10.20944/preprints202404.1914.v1
Gaurav, K. V.; Rai, H.; Singh, K. R.; Sharma, S.; Ando, Y.; PANDEY, S. S. Clarifying the Dominant Role of Crystallinity and Molecular Orientation in Differently Processed Thin Films Regioregular poly(3-Hexylthiophene). Preprints2024, 2024041914. https://doi.org/10.20944/preprints202404.1914.v1
APA Style
Gaurav, K. V., Rai, H., Singh, K. R., Sharma, S., Ando, Y., & PANDEY, S. S. (2024). Clarifying the Dominant Role of Crystallinity and Molecular Orientation in Differently Processed Thin Films Regioregular poly(3-Hexylthiophene). Preprints. https://doi.org/10.20944/preprints202404.1914.v1
Chicago/Turabian Style
Gaurav, K. V., Yoshito Ando and SHYAM S. PANDEY. 2024 "Clarifying the Dominant Role of Crystallinity and Molecular Orientation in Differently Processed Thin Films Regioregular poly(3-Hexylthiophene)" Preprints. https://doi.org/10.20944/preprints202404.1914.v1
Abstract
Conjugated polymers (CPs) offer potentials for sustainable semiconductor devices due to their low cost, and inherent molecular self-assembly. Enhanced crystallinity and molecular orientation in thin films of solution-processable CPs have significantly improved organic electronic device per-formance. In this work, three methods namely spin-coating, dip-coating, and unidirectional float-ing-film transfer method (UFTM) were utilized with their parametric optimization for fabricating RR-P3HT films. These films were then utilized for their characterization via optical and micro-structural analysis to elucidate dominant roles of molecular orientation, and crystallinity in con-trolling charge transport in organic field-effect transistors (OFETs). OFETs fabricated by RR-P3HT thin films using spin-coating and dip-coating displayed field-effect mobility (μ) of 8.0 × 10-4 cm2V-1s-1 and 1.3 × 10-3 cm2V-1s-1, respectively. This two-time enhancement in (µ for dip-coated films was attributed to its enhanced crystallinity. Interestingly, UFTM films based OFETs demon-strated μ of 7.0 × 10-2 cm2V-1s-1, >100 times increment as compared to its spin-coated counterpart This superior device performance is attributed to synergistic influence of higher crystallinity and molecular orientation. Since the crystallinity of dip-coated and UFTM-thin films are similar ~50 times improved µ of UFTM thin films suggest a dominant role of molecular orientation as com-pared to crystallinity in controlling the charge transport.
Keywords
Regioregular poly(3-hexylthiophene); organic field-effect transistors; thin films; crystallinity; orientation; unidirectional floating film transfer
Subject
Physical Sciences, Applied Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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