Electric Field Tuning Molecular Packing and Electrical Properties of Solution-Shearing Coated Organic Semiconducting Thin Films
Abstract
Recent improvements in solution-coated organic semiconductors (OSCs) evidence their high potential for cost-efficient organic electronics and sensors. Molecular packing structure determines the charge transport property of molecular solids. However, it remains challenging to control the molecular packing structure for a given OSC. Here, the application of alternating electric fields is reported to fine-tune the crystal packing of OSC solution-shearing coated at ambient conditions. First, a theoretical model based on dielectrophoresis is developed to guide the selection of the optimal conditions (frequency and amplitude) of the electric field applied through the solution-shearing blade during coating of OSC thin films. Next, electric field-induced polymorphism is demonstrated for OSCs with both herringbone and 2D brick-wall packing motifs in 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene and 6,13-bis(triisopropylsilylethynyl) pentacene, respectively. Favorable molecular packing can be accessible in some cases, resulting in higher charge carrier mobilities. In conclusion, this work provides a new approach to tune the properties of solution-coated OSCs in functional devices for high-performance printed electronics.
- Authors:
-
- Stanford Univ., Stanford, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1353187
- Alternate Identifier(s):
- OSTI ID: 1401739
- Grant/Contract Number:
- P2ELP2_155355; SC0016523; FOA-0000654-1588; 1434799; AC02-76SF00515; DE‐SC0016523; DE‐FOA‐0000654‐1588
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 8; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Molina-Lopez, Francisco, Yan, Hongping, Gu, Xiaodan, Kim, Yeongin, Toney, Michael F., and Bao, Zhenan. Electric Field Tuning Molecular Packing and Electrical Properties of Solution-Shearing Coated Organic Semiconducting Thin Films. United States: N. p., 2017.
Web. doi:10.1002/adfm.201605503.
Molina-Lopez, Francisco, Yan, Hongping, Gu, Xiaodan, Kim, Yeongin, Toney, Michael F., & Bao, Zhenan. Electric Field Tuning Molecular Packing and Electrical Properties of Solution-Shearing Coated Organic Semiconducting Thin Films. United States. https://doi.org/10.1002/adfm.201605503
Molina-Lopez, Francisco, Yan, Hongping, Gu, Xiaodan, Kim, Yeongin, Toney, Michael F., and Bao, Zhenan. Tue .
"Electric Field Tuning Molecular Packing and Electrical Properties of Solution-Shearing Coated Organic Semiconducting Thin Films". United States. https://doi.org/10.1002/adfm.201605503. https://www.osti.gov/servlets/purl/1353187.
@article{osti_1353187,
title = {Electric Field Tuning Molecular Packing and Electrical Properties of Solution-Shearing Coated Organic Semiconducting Thin Films},
author = {Molina-Lopez, Francisco and Yan, Hongping and Gu, Xiaodan and Kim, Yeongin and Toney, Michael F. and Bao, Zhenan},
abstractNote = {Recent improvements in solution-coated organic semiconductors (OSCs) evidence their high potential for cost-efficient organic electronics and sensors. Molecular packing structure determines the charge transport property of molecular solids. However, it remains challenging to control the molecular packing structure for a given OSC. Here, the application of alternating electric fields is reported to fine-tune the crystal packing of OSC solution-shearing coated at ambient conditions. First, a theoretical model based on dielectrophoresis is developed to guide the selection of the optimal conditions (frequency and amplitude) of the electric field applied through the solution-shearing blade during coating of OSC thin films. Next, electric field-induced polymorphism is demonstrated for OSCs with both herringbone and 2D brick-wall packing motifs in 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene and 6,13-bis(triisopropylsilylethynyl) pentacene, respectively. Favorable molecular packing can be accessible in some cases, resulting in higher charge carrier mobilities. In conclusion, this work provides a new approach to tune the properties of solution-coated OSCs in functional devices for high-performance printed electronics.},
doi = {10.1002/adfm.201605503},
journal = {Advanced Functional Materials},
number = 8,
volume = 27,
place = {United States},
year = {2017},
month = {1}
}
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