Organic LEDs based on Bis(8-hydroxyquinoline) zinc derivatives with a styryl group
Authors:
- Malgorzata Sypniewska,
- Monika Pokladko-Kowar,
- Ewa Gondek,
- Aleksandra Apostoluk,
- Piotr Kamedulski,
- Vitaliy Smokal,
- Peng Song,
- Junyan Liu,
- Robert Szczesny,
- Beata Derkowska-Zielinska
Abstract
For the first time, organic light-emitting diodes (OLEDs) based on bis(8-hydroxyquinoline) zinc with a styryl group (ZnStq) dispersed in poly(N-vinylcarbazole) matrix (ZnStq_R:PVK, where R = H, Cl, OCH3 ) were fabricated. The ZnStq_R:PVK films made via the spin-coating method were used as the active layer in these devices. The produced OLEDs showed strong electroluminescence with yellow emissions at 590, 587 and 578 nm for the ZnStq_H:PVK, ZnStq_Cl:PVK and ZnStq_OCH3 :PVK, respectively. For all the studied thin films, the main photoluminescence emission bands were observed between 565 and 571 nm. The OLED with the ZnStq_OCH3 :PVK layer with a narrow electroluminescence spectrum was found to have sufficient color purity to produce ultrahigh-resolution displays with reduced power consumption (full width at half maximum of 59 nm, maximum brightness of 2244 cd/m2 and maximum current efficiency of 1.24 cd/A, with a turn-on voltage of 6.94 V and a threshold voltage of 7.35 V). To characterize the photophysical properties of the active layer, the ZnStq_R:PVK layers samples were additionally deposited on glass and silicon substrates. We found that the obtained results predestine ZnStq_R:PVK layers for use in the lighting industry in the future.
- Record ID
- CUTf4bf6453d9a34f52a927291b9343680e
- Publication categories
- ;
- Author
- Journal series
- Molecules, ISSN , e-ISSN 1420-3049, Biweekly
- Issue year
- 2023
- Vol
- 28
- No
- 21
- Pages
- [1-12]
- Article number
- 7435
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 10-12; Bibliografia (liczba pozycji) - 39; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 28, Iss. 21
- Substantive notes
- Special Issue: Advanced Materials for Energy and Sustainability
- Keywords in English
- OLED, thin films, bis(8-hydroxyquinoline) zinc derivatives, ellipsometry, absorption coefficient, refractive index, photo- and electroluminescence
- ASJC Classification
- DOI
- DOI:10.3390/molecules28217435 Opening in a new tab
- URL
- https://www.mdpi.com/1420-3049/28/21/7435 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTf4bf6453d9a34f52a927291b9343680e/
- URN
urn:pkr-prod:CUTf4bf6453d9a34f52a927291b9343680e
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