High-performance red and white organic light-emitting diodes based on a novel red thermally activated delayed fluorescence emitter in an exciplex matrix

Uoyama, 2012, Highly efficient organic light-emitting diodes from delayed fluorescence, Nature, 492, 234, 10.1038/nature11687 Kim, 2021, Concentration quenching–resistant multiresonance thermally activated delayed fluorescence emitters, Mater. Today Energy., 21, 100792, 10.1016/j.mtener.2021.100792 Wong, 2017, Purely organic thermally activated delayed fluorescence materials for organic light-emitting diodes, Adv. Mater., 29, 1605444, 10.1002/adma.201605444 Data, 2016, Dibenzo[a,j ]phenazine-Cored donor-acceptor-donor compounds as green-to-red/NIR thermally activated delayed fluorescence organic light emitters, Angew. Chem. Int. Ed., 55, 5739, 10.1002/anie.201600113 Tang, 2020, Highly efficient luminescence from space-confined charge-transfer emitters, Nat. Mater., 19, 1332, 10.1038/s41563-020-0710-z Lim, 2020, Highly efficient deep-blue OLEDs using a TADF emitter with a narrow emission spectrum and high horizontal emitting dipole ratio, Adv. Mater., 32, 2004083, 10.1002/adma.202004083 Zou, 2021, Partial energy transfer from blue TADF sensitizer to orange fluorescent dopant for prolonging device lifetime, Mater. Today Energy, 21, 100745, 10.1016/j.mtener.2021.100745 Kondo, 2019, Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter, Nat. Photonics, 13, 678, 10.1038/s41566-019-0476-5 Wu, 2018, Diboron compound-based organic light-emitting diodes with high efficiency and reduced efficiency roll-off, Nat. Photonics, 12, 235, 10.1038/s41566-018-0112-9 Ahn, 2019, Highly efficient blue thermally activated delayed fluorescence emitters based on symmetrical and rigid oxygen-bridged boron acceptors, Nat. Photonics, 13, 540, 10.1038/s41566-019-0415-5 Peng, 2020, Highly efficient thermally activated delayed fluorescence via an unconjugated donor–acceptor system realizing EQE of over 30%, Adv. Mater., 32, 2003885, 10.1002/adma.202003885 Zhang, 2019, High-efficiency red organic light-emitting diodes with external quantum efficiency close to 30% based on a novel thermally activated delayed fluorescence emitter, Adv. Mater., 31, 1902368, 10.1002/adma.201902368 Gong, 2020, A red thermally activated delayed fluorescence emitter simultaneously having high photoluminescence quantum efficiency and preferentially horizontal emitting dipole orientation, Adv. Funct. Mater., 30, 1908839, 10.1002/adfm.201908839 Ding, 2020, Highly efficient and color-stable thermally activated delayed fluorescence white light-emitting diodes featured with single-doped single emissive layers, Adv. Mater., 32, 1906950, 10.1002/adma.201906950 Wu, 2019, Strategic-tuning of radiative excitons for efficient and stable fluorescent white organic light-emitting diodes, Nat. Commun., 10, 2380, 10.1038/s41467-019-10104-4 Kim, 2018, Recent progress of highly efficient red and near-infrared thermally activated delayed fluorescent emitters, Adv. Optical Mater., 6, 1800255, 10.1002/adom.201800255 Gan, 2019, Utilizing a spiro TADF moiety as a functional electron donor in TADF molecular design toward efficient “multichannel” reverse intersystem crossing, Adv. Funct. Mater., 29, 1808088, 10.1002/adfm.201808088 Zhang, 2018, Versatile indolocarbazole-isomer derivatives as highly emissive emitters and ideal hosts for thermally activated delayed fluorescent OLEDs with alleviated efficiency roll-off, Adv. Mater., 30, 1705406, 10.1002/adma.201705406 Byeon, 2019, Recent progress of singlet-exciton-harvesting fluorescent organic light-emitting diodes by energy transfer processes, Adv. Mater., 31, 1803714, 10.1002/adma.201803714 Im, 2017, Molecular design strategy of organic thermally activated delayed fluorescence emitters, Chem. Mater., 29, 1946, 10.1021/acs.chemmater.6b05324 Yang, 2017, Recent advances in organic thermally activated delayed fluorescence materials, Chem. Soc. Rev., 46, 915, 10.1039/C6CS00368K Zhang, 2021, Pyridine-substituted triazine as an acceptor for thermally activated delayed fluorescence emitters showing high efficiency and low roll-off in organic light-emitting diodes, Mater. Today Energy., 20, 100581, 10.1016/j.mtener.2020.100581 Pan, 2016, Efficient and tunable thermally activated delayed fluorescence emitters having orientation-adjustable CN-substituted pyridine and pyrimidine acceptor units, Adv. Funct. Mater., 26, 7560, 10.1002/adfm.201602501 Wu, 2019, Chiral octahydro-binaphthol compound-based thermally activated delayed fluorescence materials for circularly polarized electroluminescence with superior EQE of 32.6% and extremely low efficiency roll-off, Adv. Mater., 31, 1900524, 10.1002/adma.201900524 Park, 2018, High-performance dibenzoheteraborin-based thermally activated delayed fluorescence emitters: molecular architectonics for concurrently achieving narrowband emission and efficient triplet-singlet spin conversion, Adv. Funct. Mater., 28, 1802031, 10.1002/adfm.201802031 Yuan, 2017, Over 10% EQE near-infrared electroluminescence based on a thermally activated delayed fluorescence emitter, Adv. Funct. Mater., 27, 1700986, 10.1002/adfm.201700986 Zhang, 2014, Anthraquinone-based intramolecular charge-transfer compounds: computational molecular design, thermally activated delayed fluorescence, and highly efficient red electroluminescence, J. Am. Chem. Soc., 136, 18070, 10.1021/ja510144h Chen, 2018, Red organic light-emitting diode with external quantum efficiency beyond 20% based on a novel thermally activated delayed fluorescence emitter, Adv. Sci., 5, 1800436, 10.1002/advs.201800436 Chen, 2019, Red/near-infrared thermally activated delayed fluorescence OLEDs with near 100 % internal quantum efficiency, Angew. Chem. Int. Ed., 58, 14660, 10.1002/anie.201906575 Chen, 2021, Managing locally excited and charge-transfer triplet states to facilitate up-conversion in red TADF emitters that are available for both vacuum- and solution-processes, Angew. Chem. Int. Ed., 60, 2478, 10.1002/anie.202012070 Liang, 2018, Novel blue bipolar thermally activated delayed fluorescence material as host emitter for high-efficiency hybrid warm-white OLEDs with stable high color-rendering index, Adv. Funct. Mater., 28, 1707002, 10.1002/adfm.201707002 Liu, 2015, Remanagement of singlet and triplet excitons in single-emissive-layer hybrid white organic light-emitting devices using thermally activated delayed fluorescent blue exciplex, Adv. Mater., 27, 7079, 10.1002/adma.201502897 Liu, 2016, Novel strategy to develop exciplex emitters for high-performance OLEDs by employing thermally activated delayed fluorescence materials, Adv. Funct. Mater., 26, 2002, 10.1002/adfm.201505014 Chapran, 2019, Realizing 20% external quantum efficiency in electroluminescence with efficient thermally activated delayed fluorescence from an exciplex, ACS Appl. Mater. Interfaces, 11, 13460, 10.1021/acsami.8b18284 Hung, 2016, Balance the carrier mobility to achieve high performance exciplex OLED using a triazine-based acceptor, ACS Appl. Mater. Interfaces, 8, 4811, 10.1021/acsami.5b11895