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Light-sensitive charge storage medium with spironaphthooxazine molecule-polymer blends for dual-functional organic phototransistor memory
Korea Inst Sci and Technol, South Korea.
Korea Inst Sci and Technol, South Korea.
Korea Inst Sci and Technol, South Korea.
Korea Inst Sci and Technol, South Korea.
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2020 (English)In: Organic electronics, ISSN 1566-1199, E-ISSN 1878-5530, Vol. 78, article id UNSP 105554Article in journal (Refereed) Published
Abstract [en]

Organic phototransistor memory is considered as a promising optoelectronic device owing to its multifunctionality. However, due to the poor reliability of each function and the complexity of the device structure, it is necessary to optimize the thin-film process of functional materials when constructing multiple functions into a single device. Here, we demonstrate a dual-functional device that is both a working memory transistor and a phototransistor by incorporating photochromic spironaphthooxazine molecules into an organic insulating layer. The photochmmic molecules in the polymer matrix not only exhibit nonvolatile charge storage properties similar to nano-floating gates but also feature a reversible electronic band structure upon alternating irradiation with ultraviolet and visible light, which makes the device function as both an electrical memory transistor and a phototransistor. Furthermore, the photoresponsive charge trap layer in the demonstrated device leads to excellent memory performance under both dark and light conditions, which includes a large memory window (-56 V), stable endurance cycles (amp;gt;10(2)), and good retention characteristics (amp;gt;10(4) s). Our findings suggest an alternative strategy to realize organic multifunctional nonvolatile memories.

Place, publisher, year, edition, pages
ELSEVIER , 2020. Vol. 78, article id UNSP 105554
Keywords [en]
Organic field-effect transistor; Nonvolatile memory; Photosensor; Photochromic; Multifunctional
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-164658DOI: 10.1016/j.orgel.2019.105554ISI: 000517963700036OAI: oai:DiVA.org:liu-164658DiVA, id: diva2:1417574
Note

Funding Agencies|Ministry of Trade, Industry, and Energy (MOTIE, Korea) [10051162]; Korea Institute for Advancement of Technology (KIAT) - Korea Government (MOTIE) [P0002007]

Available from: 2020-03-29 Created: 2020-03-29 Last updated: 2020-03-29

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Fabiano, SimoneBerggren, Magnus
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Laboratory of Organic ElectronicsFaculty of Science & Engineering
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CiteExportLink to record
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Citation style
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