Charge Transport in Electrically Doped Amorphous Organic Semiconductors. Issue 11 (9th April 2015)

• Record Type: Journal Article
• Authors: Yoo, Seung‐Jun; Kim, Jang‐Joo; Char, K.; Zentel, R.
• Is Part Of: Macromolecular rapid communications. Volume 36:Issue 11(2015:Jun.)
• Page Start: 984
• Page End: 1000
• Publication Date: 2015-04-09
• Subjects: Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201500026
• Languages: English
• ISSNs: 1022-1336

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>This article reviews recent progress on charge generation by doping and its influence on the carrier mobility in organic semiconductors (OSs). The doping induced charge generation efficiency is generally low in OSs which was explained by the integer charge transfer model and the hybrid charge transfer model. The ionized dopants formed by charge transfer between hosts and dopants can act as Coulomb traps for mobile charges, and the presence of Coulomb traps in OSs broadens the density of states (DOS) in doped organic films. The Coulomb traps strongly reduce the carrier hopping rate and thereby change the carrier mobility, which was confirmed by experiments in recent years. In order to fully understand the doping mechanism in OSs, further quantitative and systematic analyses of charge transport characteristics must be accomplished. <graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgjqkbp5w8" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> </abstract>