Red Organic Light-Emitting-Diodes based on a N-Annulated Perylene Diimide Dimer

23 October 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

In this contribution we report on solution processed red OLEDs based upon a N-annulated perylene diimide dimer, namely tPDI2N-EH, a red-light emitting molecule. OLED devices with the architecture of glass/ITO/PEDOT:PSS/EML/LiF/Ag (EML = emitting layer) were fabricated with EMLs comprised of tPDI2N-EH neat and blended with poly (9,9-dicotylfluorene, PFO), all solution processed from non-halogenated solvents. The photophysical and electrophysical performance of PFO:tPDI2N-EH-blend films with different composition ratios were investigated. The PFO:tPDI2N-EH-based OLEDs with a 2:18 ratio exhibited best performance. The PFO:tPDI2N-EH-based OLEDs gave red electroluminescence with the emission wavelength of 635 nm and the CIE (international commission on illumination) coordinates of (x = 0.672, y = 0.321). OLEDs with EMLs fabricated using roll-to-roll compatible methods are also demonstrated.

Keywords

OLED device
Perylene Diimide Dye
slot-die coating methods
solution processing conditions

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