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3 October 2022 Nurturing next blue solution: blue phosphorescent organic light-emitting diode (Conference Presentation)
Jinwon Sun, Sunghan Kim, Changwoong Chu
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Proceedings Volume PC12208, Organic and Hybrid Light Emitting Materials and Devices XXVI; PC1220804 (2022) https://doi.org/10.1117/12.2637378
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States
Abstract
Blue Phosphorescent Organic Light-Emitting Didoe (PHOLED) is a sole solution for overcoming deficit electroluminescence efficiency (EL) of blue fluorescent OLEDs. However, low device lifetime of PHOLED has been a key issue that delays its commercial debut. In this work, we demonstrate the unprecedented device lifetime of blue PHOLED which is the longest device lifetime to our best knowledge. Platinum(II) complex-based PHOLED exhibits deep blue emission with Commission International de l’Eclairage (CIE) y-value less than 0.2. Newly designed tetradentate platinum (II) complex played a critical role on improving stability along with host materials which forms intermolecular charge-transfer(CT) complex. Addition of di-tert-butylbenzene to benzimidazole not only prohibits undesired CT complex between host and guest but also enhanced material stability by having high metal centered triplet state(3MC) in the Pt complex. The both host materials of hole transporting and electron transporting materials utilized tert-phenyl-silane as a bulky unit to enhance color purity of PHOLED and material stability of host materials.
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Jinwon Sun, Sunghan Kim, and Changwoong Chu "Nurturing next blue solution: blue phosphorescent organic light-emitting diode (Conference Presentation)", Proc. SPIE PC12208, Organic and Hybrid Light Emitting Materials and Devices XXVI, PC1220804 (3 October 2022); https://doi.org/10.1117/12.2637378
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KEYWORDS
Phosphorescent organic light-emitting diodes
Electroluminescence
Platinum
Electron transport
Metals
Organic light emitting diodes
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