Incorporating triphenyl sulfonium salts in polyfluorene PLEDs: An all-organic approach to improved charge injection

Georgiadou, DG; Palilis, LC; Vasilopoulou, M; Pistolis, G; Dimotikali, D; Argitis, P

dc.contributor.author	Georgiadou, DG	en
dc.contributor.author	Palilis, LC	en
dc.contributor.author	Vasilopoulou, M	en
dc.contributor.author	Pistolis, G	en
dc.contributor.author	Dimotikali, D	en
dc.contributor.author	Argitis, P	en
dc.date.accessioned	2014-03-01T01:35:51Z
dc.date.available	2014-03-01T01:35:51Z
dc.date.issued	2011	en
dc.identifier.issn	0959-9428	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21219
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Anion size	en
dc.subject.other	Anode side	en
dc.subject.other	Blend morphology	en
dc.subject.other	Device architectures	en
dc.subject.other	Electrochemical stabilities	en
dc.subject.other	Emitting polymers	en
dc.subject.other	Hole injection	en
dc.subject.other	Ionic compounds	en
dc.subject.other	Luminescent property	en
dc.subject.other	Luminous efficiency	en
dc.subject.other	Operating characteristics	en
dc.subject.other	Peak luminance	en
dc.subject.other	Polyfluorenes	en
dc.subject.other	Polymer light emitting diode	en
dc.subject.other	Recombination rate	en
dc.subject.other	Relative energies	en
dc.subject.other	Single layer	en
dc.subject.other	Space charge formations	en
dc.subject.other	Sulfonium salts	en
dc.subject.other	Triflates	en
dc.subject.other	Charge injection	en
dc.subject.other	Conjugated polymers	en
dc.subject.other	Polymer blends	en
dc.subject.other	Salts	en
dc.subject.other	Thermodynamic stability	en
dc.subject.other	Organic light emitting diodes (OLED)	en
dc.title	Incorporating triphenyl sulfonium salts in polyfluorene PLEDs: An all-organic approach to improved charge injection	en
heal.type	journalArticle	en
heal.identifier.primary	10.1039/c0jm04567e	en
heal.identifier.secondary	http://dx.doi.org/10.1039/c0jm04567e	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	All-organic sulfonium salts are introduced as a class of ionic compounds that show high compatibility with conjugated polymers and may form blends with attractive luminescent properties leading to significant improvement in single-layer polymer light emitting diodes' (PLEDs') performance. We demonstrate that triphenylsulfonium (TPS) triflate:polyfluorene-co-benzothiadiazole (F8BT)-blend based PLEDs show a lower turn-on voltage, an increased luminous efficiency and higher peak luminance values. These results are being rationalized in terms of anionic accumulation and space charge formation at the anode side, which facilitates hole injection, leading to more balanced injection and subsequently to a higher recombination rate. Moreover, we find that the salt anion size plays a critical role in the device operating characteristics. The judicious choice of both the salt and the emitting polymer by considering relative energy level alignment, salt electrochemical stability and acquired thermodynamic stability of blend morphology is important for the achievement of high performance PLEDs without requiring elaborate device architectures. © 2011 The Royal Society of Chemistry.	en
heal.publisher	ROYAL SOC CHEMISTRY	en
heal.journalName	Journal of Materials Chemistry	en
dc.identifier.doi	10.1039/c0jm04567e	en
dc.identifier.isi	ISI:000291611600050	en
dc.identifier.volume	21	en
dc.identifier.issue	25	en
dc.identifier.spage	9296	en
dc.identifier.epage	9301	en