A Novel Benzo[d,e]Chromene for Organic Light Emitting Diodes (OLEDs)

Abstract:

Organic light emitting diodes (OLEDs) have been known for the next generation of display technology. In this work, we synthesized four benzo[d,e]chromene derivatives (BS01-BS04) varying the position of fluorine atom for OLED application. The compounds were characterized by ¹H and ¹³C NMR, FTIR and mass spectroscopy. Their photoluminescence properties were studied which showed the thermally activated delayed fluorescence (TADF) character from intramolecular charged transfer (ICT) transition. The compounds were used as a dopant for OLEDs in the structure of ITO/NPB/BS01-BS04/Bphen/LiF/Al. The BS02 device exhibited green colour with the current efficiency at 1.28 cd/A and the power efficiency at 0.47 Im/W.

• Periodical: Applied Mechanics and Materials (Volume 876)
• Pages: 71-75
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.876.71
• Online since: February 2018
• Authors: Benjawan Somchob, Somboon Sahasitthiwat, Rukkiat Jitchati*
• Keywords: Chromene, OLED, TADF

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