Magnetic Field Effect in Organic Light-Emitting Diodes Based on Electron Donor-Acceptor Exciplex Chromophores Doped with Fluorescent Emitters

Baniya Sangita; Pang Zhiyong; Sun Dali; Zhai Yaxin; Kwon Ohyun; Choi Hyeonho; Choi Byoungki; Lee Sangyoon; Vardeny Valy

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Magnetic Field Effect in Organic Light-Emitting Diodes Based on Electron Donor-Acceptor Exciplex Chromophores Doped with Fluorescent Emitters

机译：掺杂有荧光发射体的电子给体-受体复合发色团在有机发光二极管中的磁场效应

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A new type of organic light-emitting diode (OLED) has emerged that shows enhanced operational stability and large internal quantum efficiency approaching 100%, which is based on thermally activated delayed fluorescence (TADF) compounds doped with fluorescent emitters. Magne-to-electroluminescence (MEL) in such TADF-based OLEDs and magnetophoto-luminescence (MPL) in thin films based on donor-acceptor (D-A) exciplexes doped with fluorescent emitters with various concentrations are investigated. It has been found that both MEL and MPL responses are thermally activated with substantially lower activation energy compared to that in the pristine undoped D-A exciplex host blend. In addition, both MPL and MEL steeply decrease with the emitter's concentration. This indicates the existence of a loss mechanism, whereby the triplet charge-transfer state in the exciplex host blend may directly decay to the lowest, nonemissive triplet state of the fluorescent emitter molecules.

机译：一种新型有机发光二极管（OLED）出现了，其显示了增强的操作稳定性和接近100％的大内部量子效率，这是基于掺有荧光发射体的热激活延迟荧光（TADF）化合物的。研究了这种基于TADF的OLED中的磁致电致发光（MEL）和基于掺杂有各种浓度荧光发射体的施主-受主（D-A）激基复合物的薄膜中的磁光致发光（MPL）。已经发现，与原始的未掺杂的D-A激基复合物主体共混物相比，MEL和MPL响应均以显着更低的活化能被热活化。另外，MPL和MEL都随着发射器的浓度而急剧下降。这表明存在损耗机制，由此激基复合物主体掺合物中的三重态电荷转移状态可能直接衰减到荧光发射体分子的最低，无辐射三重态。

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《Advanced Functional Materials》 |2016年第38期|6930-6937|共8页
作者
Baniya Sangita; Pang Zhiyong; Sun Dali; Zhai Yaxin; Kwon Ohyun; Choi Hyeonho; Choi Byoungki; Lee Sangyoon; Vardeny Valy;
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Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA;

Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA|Shandong Univ, Sch Phys, Jinan 250100, Peoples R China;

Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA;

Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA;

Samsung Elect Co Ltd, Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, Gyeonggi Do, South Korea;

Samsung Elect Co Ltd, Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, Gyeonggi Do, South Korea;

Samsung Elect Co Ltd, Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, Gyeonggi Do, South Korea;

Samsung Elect Co Ltd, Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, Gyeonggi Do, South Korea;

Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA;

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专利

1. Efficient Exciplex-based Green and Near-Infrared Organic Light-Emitting Diodes Employing a Novel Donor-Acceptor Type Donor [J] . Zhao Juewen, Ye Jun, Du Xiaoyang, Chemistry, an Asian journal . 2020,第23期

机译：高效的基于Exciplex的绿色和近红外有机发光二极管，采用新型供体型供体
2. All-fluorescent white organic light-emitting diodes with EQE exceeding theoretical limit of 5% by incorporating a novel yellow fluorophor in co-doping forming blue exciplex [J] . Yaping Zhao, Jing Zhang, Yanqin Miao, Organic Electronics . 2020,第Auga期

机译：通过在共掺杂形成蓝色Exciplex中，通过掺入新的黄色荧光团，所有荧光白色有机发光二极管超过理论限制为5％5％
3. Non-doped thermally activated delayed fluorescent organic light-emitting diodes using an intra- and intermolecular exciplex system with a meta-linked acridine–triazine conjugate [J] . Seongjin Jeong, Youngnam Lee, Joon Ki Kim, Journal of Materials Chemistry, C. materials for optical and electronic devices . 2018,第34期

机译：非掺杂热活化的延迟荧光有机发光二极管，使用具有元链状的吖啶-Tri嗪缀合物
4. Electronic and optical properties of novel carbazole-based donor-acceptor compounds for applications in blue-emitting organic light-emitting diodes [C] . Christian M. Legaspi, Regan E. Stubbs, David J. Yaron, Conference on physical chemistry of interfaces and nanomaterials . 2015

机译：新型咔唑基供体-受体化合物的电子和光学性质，可用于发蓝光的有机发光二极管
5. Magnetic Field Effects in Exciplex- and Exciton-Based Organic Light Emitting Diodes and Radical-Doped Devices [D] . Wang, Yifei. 2017

机译：基于Exciplex和基于激子的有机发光二极管和自由基掺杂器件的磁场效应
6. Using fluorene to lock electronically active moieties in thermally activated delayed fluorescence emitters for high-performance non-doped organic light-emitting diodes with suppressed roll-off [O] . Lin Wu, Kai Wang, Cheng Wang, 2021

机译：使用芴以将电子活性部分锁定在热活化的延迟荧光发射器中用于高性能的非掺杂有机发光二极管抑制滚动
7. Magnetic field effects in exciplex- and exciton-based organic light emitting diodes and radical-doped devices [O] . Yifei Wang -1

机译：基于Exciplex和基于激子的有机发光二极管和自由基掺杂器件的磁场效应

Magnetic Field Effect in Organic Light-Emitting Diodes Based on Electron Donor-Acceptor Exciplex Chromophores Doped with Fluorescent Emitters

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