Light-responsive spiropyran based polymer thin films for use in organic field-effect transistor memories
- Authors
- Jeong, Yong Jin; Yoo, Eun Joo; Kim, Lae Ho; Park, Seonuk; Jang, Jaeyoung; Kim, Se Hyun; Lee, Seung Woo; Park, Chan Eon
- Issue Date
- 2016
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY C, v.4, no.23, pp.5398 - 5406
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY C
- Volume
- 4
- Number
- 23
- Start Page
- 5398
- End Page
- 5406
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/5689
- DOI
- 10.1039/c6tc00798h
- ISSN
- 2050-7526
- Abstract
- Light-responsive spirotype compounds have been receiving attention as attractive smart materials because of their various potential applications in organic optoelectronic devices, based on organic field-effect transistors (OFETs). However, it still remains a challenge to apply the organic flash memory devices using spirotype compounds due to the relatively poor development of new photosensitive electret materials. Here, we report the synthesis of a novel photosensitive polymer electret material, spiropyran, containing poly(3,5-benzoic acid hexafluoroisopropylidene diphthalimide) (6FDA-DBA-SP), and the development of light-responsive flexible memory devices using the 6FDA-DBA-SP electret layer. The charge trapping properties of 6FDA-DBA-SP under light illumination were enhanced by the electron withdrawing properties and lowering energetic barrier of charge trapping between 6FDA-DBA-SP and pentacene analysed by measuring the electronic structures at the pentacene/6FDA-DBA-SP interfaces. The resulting OFETs showed enlarged hysteresis under white-light illumination and exhibited bi-stable current states after the light-assisted programing and erasing processes, and they were utilized in non-volatile flexible memory device applications.
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