Combined Inter- and Intramolecular Charge-Transfer Processes for Highly Efficient Fluorescent Organic Light-Emitting Diodes with Reduced Triplet Exciton Quenching
Combined Inter- and Intramolecular Charge-Transfer Processes for Highly Efficient Fluorescent Organic Light-Emitting Diodes with Reduced Triplet Exciton Quenching
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DOI：
10.1002/adma.201606448
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发表时间：
2017-05-03
影响因子：
29.4
通讯作者：
Kim, Jang-Joo
中科院分区：
文献类型：
--
作者：
Moon, Chang-Ki;Suzuki, Katsuaki;Kim, Jang-Joo
使用激基复合物形成主体和热活化延迟荧光掺杂剂组合分子间和分子内电荷转移过程，用于制造高效荧光有机发光二极管，沿着在高电流密度下降低的效率滚降。在主体上从三重态激基复合物到单重态激基复合物的额外转化，随后能量转移到掺杂剂，减少了掺杂剂分子上的三重态激子的数量，从而减少了在高电流密度下的三重态激子湮灭。
Inter-and intramolecular charge-transfer processes are combined using an exciplex-forming host and a thermally activated delayed fluorescent dopant, for fabricating efficient fluorescent organic light-emitting diodes along with the reduced efficiency roll-off at high current densities. Extra conversion on the host from triplet exciplexes to singlet exciplexes followed by energy transfer to the dopant reduces population of triplet excitons on dopant molecules, thereby reducing the triplet exciton annihilations at high current densities.