Cited 0 time in webofscience Cited 0 time in scopus

Development of Organic Floating-Gate Memory Transistors

Title
Development of Organic Floating-Gate Memory Transistors
Translated Title
유기 반도체를 이용한 플로팅 게이트 메모리 트랜지스터 개발
Authors
Soyeon Jeon
DGIST Authors
Soyeon Jeon; Jongmin ChoiJiwoong Yang
Advisor(s)
최종민
Co-Advisor(s)
Jiwoong Yang
Issue Date
2021
Available Date
2022-07-07
Degree Date
2021/02
Type
Thesis
Keywords
Organic field-effect transistors, donor-acceptor copolymers, flash memory, high-performance, bias stability, 유기 전계 효과 트랜지스터, 플로팅 게이트, 플래시 메모리, 바이어스 안정성
Abstract
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 per-formance and operational stability of nonvolatile floating-gate memory transistors with various additional donor units including thiophene, thiophene-vinylene-thiophene (CDT-DPP-TVT), selenophene, and seleno-phene-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 bi-as-stress stability over 105 s. To utilize the robust nature of CDT-DPP-TVT, floating-gate transistors are fabri-cated by embedding Au nanoparticles between CytopTM layers as a charge storage site. The resulting memory devices reveal bi-stable current states with high on/off current ratio larger than 104 and each state can be dis-tinguished for more than 1 year, indicating a long retention time. Moreover, a 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 prom-ising material for application in reliable organic flash memory.
Table Of Contents
1. Introduction 1 2. Experimental Section 3 2.1 Materials 3 2.2 Fabrication of OFETs and Memory Devices 3 2.3 Thin Film and Device Characterization 3 3. Results and Discussions 4 4. Conclusion 16 5. References 17 국문요약 21
URI
http://dgist.dcollection.net/common/orgView/200000361941
http://hdl.handle.net/20.500.11750/16650
DOI
10.22677/thesis.200000361941
Degree
Master
Department
Energy Science & Engineering
University
DGIST
Related Researcher
  • Author Choi, Jongmin Chemical & Energy Materials Engineering (CEME) Laboratory
  • Research Interests Advanced Metal Oxides; Colloidal Quantum Dots; Perovskite-Quantum Dot Hybrid Nanomaterials; Photocatalytic Materials
Files:
Collection:
Department of Energy Science and EngineeringThesesMaster


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE