Lee, Seung-Hoon Oh, Seung-Hwan Ji, Yongsung Kim, Juhwan Kang, Rira Khim, Dongyoon Lee, Sehyun Yeo, Jun-Seok Lu, Ning Kim, Moon J. Ko, Heung Cho Kim, Tae-Wook Noh, Yong-Young Kim, Dong-Yu 2024-01-20T09:33:41Z 2024-01-20T09:33:41Z 2021-09-05 2014-06 1566-1199 https://pubs.kist.re.kr/handle/201004/126724 This paper investigates the effects of side chains, which are important structural constituents, on the characteristics of organic resistive memory devices with water-soluble polyfluorene (WPF) derivatives. The WPF derivatives have either an ethylene oxide (EO) or an alkyl side chain the lengths of the EO side chains are 2, 4, or 6 molecules. WPFs exhibit typical bipolar switching behaviors with reliable non-volatile characteristics and good deviceto- device uniformity under ambient conditions. WPFs with the EO side chains showed better memory characteristics than those of the alkyl side chains of similar length. In addition, as the EO unit lengthened, the ON/OFF ratio of the memory device gradually increased from 5 Chi 10(2) to 10(5), and the threshold voltage (V-th) progressively decreased from 4 to 3.5 V. The retention times for WPF-hexyl, WPF-2O, WPF-4O, and WPF-6O are 10(4), 200, 10(4), and 10(4) s, respectively. The excellent switching properties of WPF-4O and WPF-6O are believed to be mainly attributed to highly localized current pathways and the low trap density. (C) 2014 Elsevier B. V. All rights reserved. English ELSEVIER ORGANIC NONVOLATILE MEMORY POLYMER THIN-FILM DEVICES PERFORMANCE VOLTAGE DONOR Side chains contributions to characteristics of resistive memory based on water-soluble polyfluorenes: Effects of structure and length of side pendant group Article 10.1016/j.orgel.2014.02.027 1 ORGANIC ELECTRONICS, v.15, no.6, pp.1290 - 1298 ORGANIC ELECTRONICS 15 6 1290 1298 scie scopus 000334740100028 2-s2.0-84899415423 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article ORGANIC NONVOLATILE MEMORY POLYMER THIN-FILM DEVICES PERFORMANCE VOLTAGE DONOR Organic resistive memory Bipolar switching Water-soluble polyfluorene Ethylene oxide side chain Conjugated polyelectrolyte