Anthracene-based molecular emitters for non-doped deep-blue organic light emitting transistors. Issue 40 (7th September 2016)

• Record Type: Journal Article
• Authors: Zambianchi, M.; Benvenuti, E.; Bettini, C.; Zanardi, C.; Seeber, R.; Gentili, D.; Cavallini, M.; Muccini, M.; Biondo, V.; Soldano, C.; Generali, G.; Toffanin, S.; Melucci, M.
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 40(2016)
• Page Start: 9411
• Page End: 9417
• Publication Date: 2016-09-07
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc02949c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Twisted anthracene derivatives, including the newly synthesized DIPAXA compound, are here investigated as blue emitters in non-doped organic light emitting transistors (OLETs). Abstract : A new anthracene-based twisted oligomer combining a rigid anthracene–xylene core with diphenylamine ends 4, 4′-(anthracene-9, 10-diyl)bis(2, 5-dimethyl- N, N -diphenylaniline), DiPAXA, is herein presented as an efficient and deep blue emitter material. By exploitingDiPAXA as an emissive layer and 2, 7-dioctyl[1]benzothieno[3, 2- b ][1]benzothiophene (C8-BTBT) as a p-type semiconducting layer, we realize a blue emitting unipolar light emitting transistor (OLET) with a maximum external quantum efficiency (EQE) of 0.13%, a charge mobility up to 0.32 cm 2 V −1 s −1 and CIE color coordinates of (0.18, 0.21), i.e. closer to currently available standards (PAL, NTSC). Moreover, comparison with other anthracene-based blue emitters highlights the suitability of this family of twisted anthracene–xylene compounds for unipolar blue OLET applications as a result of the enhanced performances in terms of CIE coordinates and light emission output of newly synthesizedDiPAXA .