Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors
Abstract
Drop casting of small-molecule organic semiconductors typically forms crystals with random orientation and poor areal coverage, which leads to significant performance variations of organic thin-film transistors (OTFTs). In this study, we utilize the controlled evaporative self-assembly (CESA) method combined with binary solvent system to control the crystal growth. A small-molecule organic semiconductor,2,5-Di-(2-ethylhexyl)-3,6-bis(5"-n-hexyl-2,2',5',2"]terthiophen-5-yl)-pyrrolo[3,4-c]pyrrole-1,4-dione (SMDPPEH), is used as an example to demonstrate the effectiveness of our approach. By optimizing the double solvent ratios, well-aligned SMDPPEH crystals with significantly improved areal coverage were achieved. As a result, the SMDPPEH based OTFTs exhibit a mobility of 1.6 × 10-2 cm2/V s, which is the highest mobility from SMDPPEH ever reported.
- Authors:
-
- Univ. of Alabama, Tuscaloosa, AL (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1286905
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 7; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Bi, Sheng, He, Zhengran, Chen, Jihua, and Li, Dawen. Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors. United States: N. p., 2015.
Web. doi:10.1063/1.4927577.
Bi, Sheng, He, Zhengran, Chen, Jihua, & Li, Dawen. Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors. United States. https://doi.org/10.1063/1.4927577
Bi, Sheng, He, Zhengran, Chen, Jihua, and Li, Dawen. Fri .
"Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors". United States. https://doi.org/10.1063/1.4927577. https://www.osti.gov/servlets/purl/1286905.
@article{osti_1286905,
title = {Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors},
author = {Bi, Sheng and He, Zhengran and Chen, Jihua and Li, Dawen},
abstractNote = {Drop casting of small-molecule organic semiconductors typically forms crystals with random orientation and poor areal coverage, which leads to significant performance variations of organic thin-film transistors (OTFTs). In this study, we utilize the controlled evaporative self-assembly (CESA) method combined with binary solvent system to control the crystal growth. A small-molecule organic semiconductor,2,5-Di-(2-ethylhexyl)-3,6-bis(5"-n-hexyl-2,2',5',2"]terthiophen-5-yl)-pyrrolo[3,4-c]pyrrole-1,4-dione (SMDPPEH), is used as an example to demonstrate the effectiveness of our approach. By optimizing the double solvent ratios, well-aligned SMDPPEH crystals with significantly improved areal coverage were achieved. As a result, the SMDPPEH based OTFTs exhibit a mobility of 1.6 × 10-2 cm2/V s, which is the highest mobility from SMDPPEH ever reported.},
doi = {10.1063/1.4927577},
journal = {AIP Advances},
number = 7,
volume = 5,
place = {United States},
year = {Fri Jul 24 00:00:00 EDT 2015},
month = {Fri Jul 24 00:00:00 EDT 2015}
}
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