Functionalized perylenes: origin of the enhanced electrical performances |
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Authors: | C Piliego F Cordella D Jarzab S Lu Z Chen A Facchetti and M A Loi |
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Institution: | (1) Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands;(2) National Nanotechnology Laboratory (NNL) of INFM-CNR, Distretto Tecnologico ISUFI, via Arnesano, 73100 Lecce, Italy;(3) Polyera Corporation, 8025 Lamon Avenue, Skokie, IL 60077, USA |
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Abstract: | In this letter we compare the transistor performances of two solution-processed perylene derivatives: N,N′-bis (n-octyl)- dicyanoperylene-3,4:9,10-bis(dicarboximide) (PDI8-CN2) and N,N′-1H,1H-perfluorobutyl dicyanoperylenediimide (PDIF-CN2). Perylenediimide nitrogen functionalization with perfluoroalkyl vs. alkyl chains improves the electron mobility of solution-processed
organic field effect transistors (OFETs) by one order of magnitude. Time resolved spectroscopy allows attributing this increment
to a higher degree of co-facial arrangement of the fluorinated molecules. This supramolecular arrangement enhances the π–π overlap leading to more efficient electron transport. |
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Keywords: | PACS" target="_blank">PACS 85 30 Tv 71 20 Rv 78 47 Cd |
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