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Fused Methoxynaphthyl Phenanthrimidazole Semiconductors as Functional Layer in High Efficient OLEDs

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Abstract

Efficient hole transport materials based on novel fused methoxynaphthyl phenanthrimidazole core structure were synthesised and characterized. Their device performances in phosphorescent organic light emitting diodes were investigated. The high thermal stability in combination with the reversible oxidation process made promising candidates as hole-transporting materials for organic light-emitting devices. Highly efficient Alq3-based organic light emitting devices have been developed using phenanthrimidazoles as functional layers between NPB [4,4-bis(N-(1-naphthyl)-N-phenylamino)biphenyl] and Alq3 [tris(8-hydroxyquinoline)aluminium] layers. Using the device of ITO/NPB/4/Alq3/LiF/Al, a maximum luminous efficiency of 5.99 cd A−1 was obtained with a maximum brightness of 40,623 cd m−2 and a power efficiency of 5.25 lm W−1.

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Acknowledgments

One of the authors Prof. J. Jayabharathi is thankful to DST (No. SR/S1/IC-73/2010), DRDO (NRB-213/MAT/10-11), UGC (F. No. 36-21/2008 (SR)) and CSIR (NO 3732/NS-EMRII) for providing funds to this research study.

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  1. Department of Chemistry, Annamalai University, Tamilnadu, Annamalainagar, 608002, India

    Jayaraman Jayabharathi, Periyasamy Ramanathan, Chockalingam Karunakaran & Venugopal Thanikachalam

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  1. Jayaraman Jayabharathi
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  2. Periyasamy Ramanathan
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  3. Chockalingam Karunakaran
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  4. Venugopal Thanikachalam
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Jayabharathi, J., Ramanathan, P., Karunakaran, C. et al. Fused Methoxynaphthyl Phenanthrimidazole Semiconductors as Functional Layer in High Efficient OLEDs. J Fluoresc 26, 307–316 (2016). https://doi.org/10.1007/s10895-015-1715-x

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