Title: Non-volatile organic field-effect transistor memory comprising sequestered metal nanoparticles in a diblock copolymer film
Authors: Chen, Chia-Min
Liu, Chih-Ming
Wei, Kung-Hwa
Jeng, U-Ser
Su, Chiu-Hun
材料科學與工程學系
Department of Materials Science and Engineering
Issue Date: 14-Jan-2012
Abstract: In this study, we fabricated p-channel-type non-volatile organic field-effect transistor (OFET) memory devices featuring an asymmetric PS-b-P4VP diblock copolymer layer incorporating high- and low-work-function metal nanoparticles (NPs) in the hydrophilic and hydrophobic blocks, respectively. We chose the highly asymmetric diblock copolymer PS(56k)-b-P4VP(8k) as the polymer electret to create the memory windows, and used the different work functions of the ex situ-synthesized metal NPs to tune the memory window for either p- or n-channel applications. The transfer curves of non-volatile OFET memory devices incorporating an asymmetric PS(56k)-b-P4VP8k layer embedded with high-work-function Pt NPs (5.65 eV) in the P4VP block exhibited a positive threshold voltage shift and a large memory window (ca. 27 V). In contrast, the transfer curves of the corresponding non-volatile OFET memory devices featuring embedded low-work-function (4.26 eV) Ag NPs exhibited a negative threshold voltage shift and a smaller memory window (ca. 19 V). This approach provides a versatile way to fabricate p- or possibly n-channel-type non-volatile organic field-effect transistor (OFET) memory devices with the same processing procedure.
URI: http://dx.doi.org/10.1039/c1jm13936c
http://hdl.handle.net/11536/15256
ISSN: 0959-9428
DOI: 10.1039/c1jm13936c
Journal: JOURNAL OF MATERIALS CHEMISTRY
Volume: 22
Issue: 2
Begin Page: 454
End Page: 461
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