Efficient Triplet Exciton Fusion in Molecularly Doped Polymer Light‐Emitting Diodes. Issue 13 (1st February 2017)

• Record Type: Journal Article
• Authors: Di, Dawei; Yang, Le; Richter, Johannes M.; Meraldi, Lorenzo; Altamimi, Rashid M.; Alyamani, Ahmed Y.; Credgington, Dan; Musselman, Kevin P.; MacManus‐Driscoll, Judith L.; Friend, Richard H.
• Is Part Of: Advanced materials. Volume 29:Issue 13(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-02-01
• Subjects: molecularly doped polymer OLEDs -- singlet exciton fission -- solid‐state TTA upconversion -- solution‐processing -- triplet exciton fusion; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201605987
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : Solution‐processed polymer organic light‐emitting diodes (OLEDs) doped with triplet–triplet annihilation (TTA)‐upconversion molecules, including 9, 10‐diphenylanthracene, perylene, rubrene and TIPS‐pentacene, are reported. The fraction of triplet‐generated electroluminescence approaches the theoretical limit. Record‐high efficiencies in solution‐processed OLEDs based on these materials are achieved. Unprecedented solid‐state TTA‐upconversion quantum yield of 23% (TTA‐upconversion reaction efficiency of 70%) at electrical excitation well below one‐sun equivalent is observed.