Light-sensitive charge storage medium with spironaphthooxazine molecule-polymer blends for dual-functional organic phototransistor memory

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

NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
Organic field-effect transistor; Nonvolatile memory; Photosensor; Photochromic; Multifunctional

Cha, An-NaKorea Inst Sci and Technol, South Korea (författare)
Lee, Sang-AKorea Inst Sci and Technol, South Korea (författare)
Lee, Seoung-KiKorea Inst Sci and Technol, South Korea (författare)
Bae, SukangKorea Inst Sci and Technol, South Korea (författare)
Jeon, Dae-YoungKorea Inst Sci and Technol, South Korea (författare)
Hong, Jae-MinKorea Inst Sci and Technol, South Korea (författare)
Fabiano, SimoneLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)simfa84 (författare)
Berggren, MagnusLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)magbe98 (författare)
Kim, Tae-WookJeonbuk Natl Univ, South Korea (författare)
Korea Inst Sci and Technol, South KoreaLaboratoriet för organisk elektronik (creator_code:org_t)

Av författaren/redakt...: Kang, Minji; Cha, An-Na; Lee, Sang-A; Lee, Seoung-Ki; Bae, Sukang; Jeon, Dae-Young; visa fler...; Hong, Jae-Min; Fabiano, Simone; Berggren, Magnus; Kim, Tae-Wook; visa färre...

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