In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 8 ( 2023), p. 3101-3111
Abstract:
Four bipolar host materials, with spiro[fluorene-9,9′-phenanthrene-10′-one] acceptors with nitrile fragments and ortho , para -phenyl carbazole, and triphenylamine as donor fragments, namely MS-CN, MS-OC, MS-PC, and MS-TPA, respectively, were designed, synthesized, and their photophysical and electrochemical studies were investigated. All MS-host materials exhibited adequate energy gaps, making them suitable candidates for use as host materials for green, yellow, and red phosphorescent organic light-emitting diodes (OLEDs). We have also designed a series of OLED devices with three different emitting layered architectures to explore their potential in electroluminescence applications. Among the devices using MS-OC, the CN-T2T-blended cohost achieved the highest efficiency among the tested yellow-emitting OLEDs, having a luminance efficiency of 80.0 cd A −1 , power efficiency of 113.0 lm W −1 , low turn-on voltage of 2.1 V, high maximum luminance of 142464 cd m −2 , and peak EQE of 27.1%. The maximum efficiency of the device is one of the highest values reported in the literature for PO-01-based devices, demonstrating the high potential of our molecular design for host materials.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702245-6
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