Rational Design of Chrysene-Based Hybridized Local and Charge-Transfer Molecules as Efficient Non-Doped Deep-Blue Emitters for Simple-Structured Electroluminescent Devices

Thanyarat Chawanpunyawat; Pongsakorn Chasing; Phattananawee Nalaoh; Phornphimon Maitarad; Taweesak Sudyodsuk; Vinich Promarak

doi:10.1002/asia.202101154

Rational Design of Chrysene-Based Hybridized Local and Charge-Transfer Molecules as Efficient Non-Doped Deep-Blue Emitters for Simple-Structured Electroluminescent Devices

Chem Asian J. 2021 Dec 13;16(24):4145-4154. doi: 10.1002/asia.202101154. Epub 2021 Nov 10.

Authors

Thanyarat Chawanpunyawat¹, Pongsakorn Chasing¹, Phattananawee Nalaoh¹, Phornphimon Maitarad², Taweesak Sudyodsuk¹, Vinich Promarak^{1

3}

Affiliations

¹ Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand.
² Research Center of Nano Science and Technology, Shanghai University, Shanghai, 200444, P. R. China.
³ Research Network of NANOTEC-VISTEC on Nanotechnology for Energy School of Molecular Science and Engineering Department, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand.

PMID: 34716663
DOI: 10.1002/asia.202101154

Abstract

Herein, we present a molecular design of chrysene-based deep-blue emissive materials (TC, TpPC, TpXC, and TmPC), in which chrysene as a core is functionalized with different triphenylamine moieties to realize a fine-tuning deep-blue fluorescence with superior electroluminescent (EL) performance. The photophysical analyses and density functional theory (DFT) calculations disclose that TC, TpPC, and TpXC possess HLCT characteristics with intense deep-blue emission in the solid-state, good hole-transporting ability, and high thermal and electrochemical stabilities. They are successfully employed as non-doped emitters in simple structured OLEDs (ITO/PEDOT : PSS : NF/emitter/TPBi/LiF : Al). In particular, TC-based device emits a deep-blue light with an emission peak at 446 nm and CIE color coordinates of (0.148, 0.096), a maximum external quantum efficiency (EQE_max ) of 4.31%, and a low turn-on voltage of 2.8 V.

Keywords: Chrysene; Electroluminescent device; Non-doped-deep blue; Polyaromatic hydrocarbon; hybridized local excited and charge transfer (HLCT).

Abstract

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