937372-45-7Relevant articles and documents
Tuning the excited-state energy of the organic chromophore in bichromophoric systems based on the RuII complexes of tridentate ligands
Medlycott, Elaine A.,Hanan, Carry S.,Loiseau, Frederique,Campagna, Sebastiano
, p. 2837 - 2846 (2007)
A series of new heteroleptic and homoleptic RuII complexes containing variously substituted bis(pyridyl)triazine ligands has been prepared and their absorption spectra, redox behaviour and luminescence properties (both in fluid solution at room
Highly efficient deep-blue fluorescence OLEDs with excellent charge balance based on phenanthro[9,10-: D] oxazole-anthracene derivatives
Huh, Jin-Suk,Kang, Seokwoo,Kim, Jang-Joo,Park, Jongwook
, p. 11168 - 11176 (2020/09/09)
Two blue fluorescent materials, m-PO-ABN and p-PO-ABN, are newly synthesized by controlling the conjugation length based on different linkages of the meta or para position between the phenanthro[9,10-d]oxazole (PO) moiety and anthracene substituted with a cyano group. The two materials emit deep-blue light with a high photoluminescence quantum yield (PLQY) in solution state. Non-doped devices fabricated using m-PO-ABN and p-PO-ABN show the EL peaks at 448 and 460 nm corresponding to the Commission Internationale de L'Eclairage (CIE) coordinates of (0.148, 0.099) and (0.150, 0.164), respectively. The external quantum efficiency (EQE) values of the devices are 5.9% and 5.3% for m-PO-ABN and p-PO-ABN, respectively. Transient EL measurements and optical calculation results reveal that both materials exhibit good charge balance and triplet-triplet annihilation in the devices, which may originate from enhanced bipolar characteristics due to the insertion of PO and cyano moieties.
Blue light organic small molecule based on triplet state-triplet state annihilation mechanism and application thereof
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Paragraph 0030-0033, (2020/07/27)
The invention belongs to the field of luminescent materials, and discloses a blue light organic small molecule based on a triplet state-triplet state annihilation mechanism and application thereof. The structural formula of the blue light organic small molecule is shown as P1n, P2n, P3n or P4n. The blue light organic small molecules can still keep high device efficiency under high brightness as alight-emitting layer, can be used for non-doped devices, is beneficial to simplifying the device structure and reducing the device manufacturing cost, and overcomes the problem of serious efficiency roll-off of a metal complex phosphorescent material under high brightness. In addition, the introduction of cyano groups can enhance the interaction between molecules, and is beneficial to improving the efficiency of TTA, thereby further improving the performance of the device.