Flexible organic transistors for bioinspired mechanosensory systems and image sensor arrays
Abstract/Contents
- Abstract
- Organic semiconductors are mechanically flexible or even stretchable, and their properties, such as electronic, optical, mechanical, chemical properties, are tunable via modification of their chemical structures. We can utilize organic semiconductors for flexible electronics, such as displays, wearable sensors, and electronic skins. When making flexible organic thin-film transistors, we need to have a good understanding of organic thin-film growth and avoid the damages of organic semiconductors from organic solvents, water, UV light, and high temperatures during fabrication. The growth and characterization of thin films of two thienoacene dimers are discussed first. Depending on alkylation, dimerization, and fusion, thienoacenes showed different thin-film morphologies and electronic properties. Then, organic thin-film transistors are fabricated on flexible substrates and used for two different bioinspired applications: artificial mechanosensory systems and hemispherical optical sensor arrays. Our artificial mechanosensory system consisted of pressure sensors, organic ring oscillators, and organic ion-gel transistors. Our artificial mechanosensory system processed pressure information in a way the biological somatosensory system does. Our artificial mechanosensory system can be used to build neurorobots and neuroprosthetics. The other application of organic thin-film transistors was hemispherical optical sensor arrays mimicking eyeballs. Photolithographic processes were used for high density, but photoresist residues contaminated gate dielectric surfaces. The photoresist residue was avoided using an aluminum sacrificial layer. The transfer process of flexible organic thin-film transistors onto a hemisphere was also described. Keywords: flexible electronics, organic thin-film transistors, bioinspired systems, neuromorphic, transfer processes.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2018; ©2018 |
| Publication date | 2018; 2018 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Kim, Yeongin |
|---|---|
| Degree supervisor | Bao, Zhenan |
| Thesis advisor | Bao, Zhenan |
| Thesis advisor | Nishi, Yoshio, 1940- |
| Thesis advisor | Wong, Hon-Sum Philip, 1959- |
| Degree committee member | Nishi, Yoshio, 1940- |
| Degree committee member | Wong, Hon-Sum Philip, 1959- |
| Associated with | Stanford University, Department of Electrical Engineering. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Yeongin Kim. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2018. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2018 by Yeongin Kim
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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