Synthesis of Cyclopentadithiophene-Diketopyrrolopyrrole Donor-Acceptor Copolymers for High-Performance Nonvolatile Floating Gate Memory Transistors with Long Retention Time
- Jeon, Soyeon; Sun, Cheng; Yu, Seong Hoon; Kwon, Soon-Ki; Chung, Dae Sung; Jeong, Yong Jin; Kim, Yun-Hi
- Issue Date
- AMER CHEMICAL SOC
- organic field-effect transistors; donor-acceptor copolymers; floating-gate; flash memory; high-performance; bias stability
- ACS APPLIED MATERIALS & INTERFACES, v.12, no.2, pp.2743 - 2752
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Start Page
- End Page
- Organic flash memories that employ solution processed polymer semiconductors preferentially require internal stability of their active channel layers. In this paper, a series of new donor-acceptor copolymers based on cyclopentadithiophene (CDT) and diketopyrrolopyrrole (DPP) are synthesized to obtain high performance and operational stability of nonvolatile floating-gate memory transistors with various additional donor units including thiophene, thiophene-vinylene-thiophene (CDT-DPP-TVT), selenophene, and selenophene-vinylene-selenophene. Detailed analyses on the photophysical, two-dimensional grazing incident X-ray diffraction, and bias stress stability are discussed, which reveal that the CDT-DPP-TVT exhibits excellent bias stress stability over 10(5) s. To utilize the robust nature of CDT-DPP-TVT, floating-gate transistors are fabricated by embedding Au nanoparticles between Cytop layers as a charge storage site. The resulting memory devices reveal bistable current states with high on/off current ratio larger than 10(4) and each state can be distinguished for more than 1 year, indicating a long retention time. Moreover, repetitive writing-reading-erasing-reading test clearly supports the reproducible memory operation with reversible and reliable electrical responses. All these results suggest that the internal stability of CDT-DPP-TVT makes this copolymer a promising material for application in reliable organic flash memory.
- Files in This Item
- There are no files associated with this item.
- Appears in
- 자연과학대학 > 화학과 > Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.