Novel Conjugated Side Chain Fluorinated Polymers Based on Fluorene for Light-Emitting and Ternary Flash Memory Devices

Overview

Journal ChemistryOpen

Specialty Chemistry

Date 2019 Oct 23

PMID 31637150

Citations 3

Authors

Qian Zhang

Dongge Ma

Dianzhong Wen

Cheng Wang

Xuduo Bai

Shuhong Wang

Affiliations

Soon will be listed here.

Abstract

Three novel conjugated polymers based on 9,9'-dioctylfluorene unit and isoindolo[2,1-]benzimidazol-11-one with different fluorine substituents (0, 2 and 4) were synthesized. PLED and resistive memory devices based on these polymers were prepared consequently. PLED based on four-fluorinated polymer showed the highest maximum brightness of 3192 cd m with almost 5-fold increase of current efficiency 8-fold increase of external quantum efficiency compared to that of the other two, and all the PLEDs exhibited good emission stability with no noticeable change of electroluminescence even under high voltage of 10 V. The memory device of doubly-fluorinated polymer exhibited ternary flash behavior with threshold voltages below -2.5 V, while device of four-fluorinated polymer possessed ON/OFF current ratio above 10. Impact of fluorine substitutions on the performance of devices were briefly investigated. The results revealed that the improvement of device performance might not scale with the increasing number of fluorine substitutions, and the four-fluorine-substituted polymer and doubly-fluorinated polymer could be encouraging materials for applications of PLED and resistive memory device and worth of further design of other new polymer systems.

Citing Articles

Conjugated Polymers Containing EDOT Units as Novel Materials for Electrochromic and Resistance Memory Devices.

He Z, Xu H, Zhang Y, Hou Y, Niu H Polymers (Basel). 2022; 14(22).

PMID: 36433091 PMC: 9696808. DOI: 10.3390/polym14224965.

Poly(Pyridinium Salt)s Containing 2,7-Diamino-9,9'-Dioctylfluorene Moieties with Various Organic Counterions Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties.

Bhowmik P, Jo T, Koh J, Park J, Biswas B, Principe R Molecules. 2021; 26(6).

PMID: 33809075 PMC: 7998704. DOI: 10.3390/molecules26061560.

Novel Conjugated Side Chain Fluorinated Polymers Based on Fluorene for Light-Emitting and Ternary Flash Memory Devices.

Zhang Q, Ma D, Wen D, Wang C, Bai X, Wang S ChemistryOpen. 2019; 8(10):1267-1275.

PMID: 31637150 PMC: 6797500. DOI: 10.1002/open.201900210.

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