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https://hdl.handle.net/11147/11338
Title: | Perylene based solution processed single layer WOLED with adjustable CCT and CRI | Authors: | Bozkuş, Volkan Aksoy, Erkan Varlıklı, Canan |
Keywords: | Solution processed WOLED WOLED Lighting Perylene derivatives Color rendering index |
Publisher: | MDPI | Abstract: | In solution processed single layer white organic light emitting diode (WOLED) applications, the choice of host matrix and optimization of dopant levels represent two crucial parameters to consider. In this work, poly(N-vinylcarbazole) (PVK): 2-(4-Biphenylyl)-5-phenyl-1,3,4-oxadiazole (PBD) and PVK:1,3-bis[(4-tert-butylphenyl)-1,3,4-oxadiazolyl] phenylene (OXD-7) matrices are used as hosts for perylene based devices. PVK:PBD presented better compatibility and lower turn-on voltages compared to PVK:OXD-7. Benefiting from the exciplex emission observed at 630 nm, a color rendering index (CRI) value of 90 is reached with the device containing PVK:PBD as the host and 0.1 wt.% of an orange emitting perylene derivative, i.e., PDI. Introduction of the perylene based green emitter, i.e., PTE, in this emitting layer not only caused a fading in the exciplex emission, but also resulted in disappearance of the electroplex peak at 535 nm, which is detected between PVK:PBD and PTE in bare PTE containing devices. Full visible range coverage is achieved by optimizing the PDI:PTE ratio. WOLED containing PVK:PBD:0.06 wt.% PDI:0.03 wt.% PTE presented high CRI (>= 95) and adjustable correlated color temperatures (CCT, 3800 K-5100 K). | URI: | https://doi.org/10.3390/electronics10060725 https://hdl.handle.net/11147/11338 |
ISSN: | 2079-9292 |
Appears in Collections: | Photonics / Fotonik Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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electronics-10-00725-v2.pdf | 3.28 MB | Adobe PDF | View/Open |
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