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Session
53
: OLED Materials II |
OLEDs
|
Thursday, May 16 / 09:00 AM - 10:20 AM / San Jose Convention Center, LL21CD
Chair:
Sven Zimmermann, Novaled GmbH, Dresden, Germany
Co-Chair:
Toshiaki Ikuta, SK materials JNC, Hwaseon-si, South Korea
53.1 - Invited Paper: Deuteration of OLED Materials: Impact on Device Performance and Commercial Manufacturing (9:00 AM - 9:20 AM)
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Elvira Montenegro, Stephanie Ganss, Marcel Bürger , Camille Correia, Aaron Lackner, Sebastian Stolz, Jonas Kröber, Anna Hayer, Jens Engelhart, Rouven Linge
Merck KGaA Darmstadt Germany
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Won-Kyung Na, Su-Hwan Na
Merck Performance Materials Ltd. Pyeongtaek South Korea
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The authors intensively investigate the impact of deuteration degree and pattern on device performance. To meet the increasing demand of deuterated electronic materials, scale-up processes, enabling high purity and cost-efficient manufacture of deuterated OLEDs, are developed. This presentation will discuss various aspects of the deuteration of OLED materials.
53.2 - Invited Paper: Highly Efficient and Pure-Blue Organic Light-Emitting Diodes Using Boron-Free Emitters (9:20 AM - 9:40 AM)
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Jihoon Kang, Jun Yeob Lee
Sungkyunkwan University Suwon South Korea
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Ha Lim Lee
Sungkyunkwan University & Samsung Electronics Co., Ltd. Suwon South Korea
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Soon Ok Jeon
Samsung Electronics Co., Ltd. Suwon South Korea
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A new class of materials is designed and synthesized as deep-blue organic emitters. Only carbon and nitrogen are used with the materials to induce the multi-resonance effect in the emitters. A deep-blue color, a narrow emission spectrum, and high efficiency by thermally activated delayed fluorescence are achieved.
53.3 - Developing Pure-Green Polycyclo-Heteraborin MR-TADF Scaffolds for Efficient, Stable Narrowband OLEDs (9:40 AM - 10:00 AM)
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Paramasivam Palanisamy, Odugu Kumar, Hae Ung Kim, Jang Hyuk Kwon
Kyung Hee University Seoul South Korea
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The authors developed two symmetrical green MR-TADF emitters, BpIC-DPA and BpIC-Cz, based on the rigidification and regulation of molecular orbitals (MOs) engineering strategies. Both emitters exhibited pure-green emission with narrow FWHM below 25 nm and a high PLQY of 84%. The BpIC-Cz device showed maximum external quantum efficiency of 25.7%.
53.4 - Boosting the Performance of Phosphor-Assisted Fluorescence Devices by Fine-Tuning the Peripheral Groups of Multi-Resonance Fluorescent Dopants (10:00 AM - 10:20 AM)
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Minghan Cai, Guomeng Li, Baoyu Li, Hongyu Wang, Genmao Huang, Xiujian Zhu, Wonjun Song
Visionox Technology Inc. Beijing China
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Yuewei Zhang, Dongdong Zhang, Lian Duan
Tsinghua University Beijing China
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In this article, the authors demonstrate that, by appropriately introducing inert substituents at the periphery of multi-resonance fluorescent dye, charge trapping introduced by fluorescent dyes can be significantly inhibited in phosphor-assisted fluorescence devices, and the energy transfer from assisted phosphors to fluorescent dyes can also be more efficient.