Abstract
Solution-processable electronic devices are highly desirable due to their low cost and compatibility with flexible substrates. However, they are often challenging to fabricate due to the hydrophobic nature of the surfaces of the constituent layers. Here, we use a protein solution to modify the surface properties and to improve the wettability of the fluoropolymer dielectric Cytop. The engineered hydrophilic surface is successfully incorporated in bottom-gate solution-deposited organic field-effect transistors (OFETs) and hybrid organic-inorganic trihalide perovskite field-effect transistors (HTP-FETs) fabricated on flexible substrates. Our analysis of the density of trapping states at the semiconductor-dielectric interface suggests that the increase in the trap density as a result of the chemical treatment is minimal. As a result, the devices exhibit good charge carrier mobilities, near-zero threshold voltages, and low electrical hysteresis.
Original language | English |
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Pages (from-to) | 18120-18126 |
Number of pages | 7 |
Journal | ACS Applied Materials and Interfaces |
Volume | 9 |
Issue number | 21 |
DOIs | |
State | Published - May 31 2017 |
Bibliographical note
Publisher Copyright:© 2017 American Chemical Society.
Funding
The organic semiconductor work at WFU was supported by the National Science Foundation under Grant No. ECCS-1254757, while the work on the perovskite semiconductors was partially supported by the NSF Grant No. ECCS-1608095 and the Office of Naval Research Grant No. N00014-15-1-2943. Semiconductor synthesis was supported by NSF Grant No. DMR-1627428. The Asylum MFP-3D-Bio AFM was obtained with a grant from the North Carolina Biotechnology Center (Grant No. 2014-IDG-1012).
Funders | Funder number |
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National Science Foundation Arctic Social Science Program | 1627428, 1608095, ECCS-1254757, ECCS-1608095 |
National Science Foundation Arctic Social Science Program | |
Office of Naval Research Naval Academy | DMR-1627428, N00014-15-1-2943 |
Office of Naval Research Naval Academy | |
North Carolina Biotechnology Center | 2014-IDG-1012 |
North Carolina Biotechnology Center |
Keywords
- charge carrier mobility
- flexible electronics
- halide perovskites
- organic semiconductors
- organic thin-film transistors
ASJC Scopus subject areas
- General Materials Science