A facile and novel route to improve TIPS pentacene based organic thin film transistor performance with elastomer

Zhengran He; Ziyang Zhang; Sheng Bi; Kyeiwaa Asare-Yeboah; Jihua Chen; Dawen Li

doi:10.1016/j.synthmet.2020.116337

A facile and novel route to improve TIPS pentacene based organic thin film transistor performance with elastomer

Zhengran He, Ziyang Zhang, Sheng Bi, Kyeiwaa Asare-Yeboah, Jihua Chen, Dawen Li

Macromolecular Nanomaterials

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

In this study, we report a facile route to regulate the crystallization and enhance charge transport of small-molecule organic semiconductors by blending with a rubbery polymer additive polyisobutylene (PIB). Using a solution-processed semiconductor 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) to mix with the PIB polymer, we show that the addition of PIB led to densely-arranged, lengthened TIPS pentacene needles with excellent long-range uniformity. Bottom-gate, top-contact organic thin-film transistors (OTFTs) based on TIPS pentacene/PIB hybrid film demonstrated a field-effect mobility of up to 0.15 cm²/Vs, and particularly, a 3-fold and 2-fold enhancement of average mobility and performance consistency (denoted by average mobility to standard deviation ratio). In addition, the effect of hexamethyldisilazane (HMDS) surfactant treatment on the semiconductor charge transport was studied. We ascribe such improved performance of TIPS pentacene/PIB blend OTFTs to the collaborative outcome of reduced crystal misorientation, diminished defects and charge trap centers, as well as a higher areal coverage. The effective method as demonstrated in this work can be generally implemented to attune the crystal growth and promote charge transport of newly-developed small-molecule organic semiconductors.

Original language	English
Article number	116337
Journal	Synthetic Metals
Volume	262
DOIs	https://doi.org/10.1016/j.synthmet.2020.116337
State	Published - Apr 2020

Funding

D.L. and Z.H. acknowledge partial support provided from the University of Alabama. S. Bi would like to thank Science and Technology Project of Liaoning Province20180540006. A part of this research was conducted at the Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, which is a DOE Office of Science User Facility.

Funders	Funder number
DOE Office of Science
Science and Technology Project of Liaoning Province20180540006
Oak Ridge National Laboratory
University of Alabama

Keywords

(Crystallization
Charge transport
Organic thin film transistors)
Polymer additive
Small-Molecule semiconductor

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10.1016/j.synthmet.2020.116337

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title = "A facile and novel route to improve TIPS pentacene based organic thin film transistor performance with elastomer",

abstract = "In this study, we report a facile route to regulate the crystallization and enhance charge transport of small-molecule organic semiconductors by blending with a rubbery polymer additive polyisobutylene (PIB). Using a solution-processed semiconductor 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) to mix with the PIB polymer, we show that the addition of PIB led to densely-arranged, lengthened TIPS pentacene needles with excellent long-range uniformity. Bottom-gate, top-contact organic thin-film transistors (OTFTs) based on TIPS pentacene/PIB hybrid film demonstrated a field-effect mobility of up to 0.15 cm2/Vs, and particularly, a 3-fold and 2-fold enhancement of average mobility and performance consistency (denoted by average mobility to standard deviation ratio). In addition, the effect of hexamethyldisilazane (HMDS) surfactant treatment on the semiconductor charge transport was studied. We ascribe such improved performance of TIPS pentacene/PIB blend OTFTs to the collaborative outcome of reduced crystal misorientation, diminished defects and charge trap centers, as well as a higher areal coverage. The effective method as demonstrated in this work can be generally implemented to attune the crystal growth and promote charge transport of newly-developed small-molecule organic semiconductors.",

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author = "Zhengran He and Ziyang Zhang and Sheng Bi and Kyeiwaa Asare-Yeboah and Jihua Chen and Dawen Li",

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AU - He, Zhengran

AU - Zhang, Ziyang

AU - Bi, Sheng

AU - Asare-Yeboah, Kyeiwaa

AU - Chen, Jihua

AU - Li, Dawen

PY - 2020/4

Y1 - 2020/4

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AB - In this study, we report a facile route to regulate the crystallization and enhance charge transport of small-molecule organic semiconductors by blending with a rubbery polymer additive polyisobutylene (PIB). Using a solution-processed semiconductor 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) to mix with the PIB polymer, we show that the addition of PIB led to densely-arranged, lengthened TIPS pentacene needles with excellent long-range uniformity. Bottom-gate, top-contact organic thin-film transistors (OTFTs) based on TIPS pentacene/PIB hybrid film demonstrated a field-effect mobility of up to 0.15 cm2/Vs, and particularly, a 3-fold and 2-fold enhancement of average mobility and performance consistency (denoted by average mobility to standard deviation ratio). In addition, the effect of hexamethyldisilazane (HMDS) surfactant treatment on the semiconductor charge transport was studied. We ascribe such improved performance of TIPS pentacene/PIB blend OTFTs to the collaborative outcome of reduced crystal misorientation, diminished defects and charge trap centers, as well as a higher areal coverage. The effective method as demonstrated in this work can be generally implemented to attune the crystal growth and promote charge transport of newly-developed small-molecule organic semiconductors.

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A facile and novel route to improve TIPS pentacene based organic thin film transistor performance with elastomer

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