Effect of end group functionalisation of small molecules featuring the fluorene–thiophene–benzothiadiazole motif as emitters in solution-processed red and orange organic light-emitting diodes. Issue 13 (14th March 2019)

• Record Type: Journal Article
• Authors: Fell, Valentin H. K.; Findlay, Neil J.; Breig, Benjamin; Forbes, Clarissa; Inigo, Anto R.; Cameron, Joseph; Kanibolotsky, Alexander L.; Skabara, Peter J.
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 13(2019)
• Page Start: 3934
• Page End: 3944
• Publication Date: 2019-03-14
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8tc02993h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A series of red fluorescent materials (compounds1–4 ), which each contain the symmetric fluorene–thiophene–BT–thiophene–fluorene core, is presented along with their performance in solution-processed OLED devices. Abstract : A series of red fluorescent materials (compounds1–4 ), which each contain the symmetric fluorene–thiophene–BT–thiophene–fluorene core, is presented along with their performance in solution-processed OLED devices. Extending the molecular conjugation through end-capping with additional fluorene units (compound2 ), or through incorporation of donor functionalities (compounds3 and4 ) improves OLED performance relative to the parent compound1 . Notably, incorporating triphenylamine donor groups in compound3 led to solution-processed OLED devices operating with a peak luminance of 2888 cd m −2 and a low turn-on voltage (3.6 V).