Efficient Triplet-Triplet Annihilation Upconversion in an Electroluminescence Device with a Fluorescent Sensitizer and a Triplet-Diffusion Singlet-Blocking Layer

© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 30(2018), 50 vom: 30. Dez., Seite e1804850
1. Verfasser: Chen, Chia-Hsun (VerfasserIn)
Weitere Verfasser: Tierce, Nathan T, Leung, Man-Kit, Chiu, Tien-Lung, Lin, Chi-Feng, Bardeen, Christopher J, Lee, Jiun-Haw
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article operation lifetime transient electroluminescence triplet-triplet annihilation upconversion
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500 |a Date Revised 01.10.2020 
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520 |a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 
520 |a Solid-state triplet-triplet annihilation upconversion (TTAUC) blue emission in an electroluminescence device (i.e., an organic light-emitting diode (OLED)) is demonstrated. A conventional green fluorophore, tris-(8-hydroxyquinoline)aluminum (Alq3 ), is employed as the sensitizer that generates 75% triplet under electrical pumping for the blue triplet-triplet annihilation emitter, 9,10-bis(2'-naphthyl) anthracene (ADN), with the heterojunction bilayer structure. The operation lifetime is elongated both for ADN blue (4.1x) and Alq3 green (34.8%) emission due to efficient use of excitons and separation of recombination and emission zone. To reduce the singlet quenching (SQ) of blue TTAUC signal by the Alq3 sensitizer with lower bandgap, 1-(2,5-dimethyl-4-(1-pyrenyl)phenyl)pyrene (DMPPP) is inserted between the Alq3 and ADN as a triplet-diffusion-and-singlet-blocking layer. DMPPP exhibits triplet energy close to Alq3 and higher than ADN, as well as higher singlet energy than both Alq3 and ADN. It allows triplet diffusion from Alq3 to ADN, but blocks the SQ of the blue TTAUC signal by Alq3 . 86.1% intrinsic efficiency of TTAUC is demonstrated in this trilayer (Alq3 /DMPPP/ADN) OLED 
650 4 |a Journal Article 
650 4 |a operation lifetime 
650 4 |a transient electroluminescence 
650 4 |a triplet-triplet annihilation upconversion 
700 1 |a Tierce, Nathan T  |e verfasserin  |4 aut 
700 1 |a Leung, Man-Kit  |e verfasserin  |4 aut 
700 1 |a Chiu, Tien-Lung  |e verfasserin  |4 aut 
700 1 |a Lin, Chi-Feng  |e verfasserin  |4 aut 
700 1 |a Bardeen, Christopher J  |e verfasserin  |4 aut 
700 1 |a Lee, Jiun-Haw  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Advanced materials (Deerfield Beach, Fla.)  |d 1998  |g 30(2018), 50 vom: 30. Dez., Seite e1804850  |w (DE-627)NLM098206397  |x 1521-4095  |7 nnns 
773 1 8 |g volume:30  |g year:2018  |g number:50  |g day:30  |g month:12  |g pages:e1804850 
856 4 0 |u http://dx.doi.org/10.1002/adma.201804850  |3 Volltext 
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