DGIST Scholar: Fast-response light-emitting electrochemical cells based on neutral iridium(III) complex

ETC 1. Journal Articles

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Fast-response light-emitting electrochemical cells based on neutral iridium(III) complex

Title: Fast-response light-emitting electrochemical cells based on neutral iridium(III) complex

Author(s): Shin, Ik-Soo ; Lim, Hong-Chul ; Oh, Jeong-Wook ; Lee, Jin-Kyu ; Kim, Tae Hyun ; Kim, Hasuck

Author Keywords: Light-emitting electrochemical cell LEC ; Iridium(III) ; Supporting electrolyte ; Response time

Keywords: Biased Voltage ; Diodes ; EFFICIENT ELECTROGENERATED CHemILUMINESCENCE ; El Response ; Electrochemical Cells ; Electroluminescence ; Electrolytes ; Electrolytic Analysis ; Electrolytic Cells ; emitting Layer ; Iridium ; Iridium Complex ; Iridium Compounds ; Iridium(III) ; LEC ; Ligands ; Light ; Light-emitting Electrochemical Cell ; Light-emitting Electrochemical Cell LEC ; Light emission ; Molar Ratio ; Potential Barriers ; Response Time ; SINGLE-LAYER ; Supporting Electrolyte ; Tetrafluoroborates

Abstract: In this study, light-emitting electrochemical cells (LECs) based on neutral iridium(III) bis(2-phenylquinolato-N,C2′)(3-isoquinaldate) were fabricated. An admixed solid supporting electrolyte tetra-n-butylammonium tetrafluoroborate (TBABF4) is employed in the emitting layer, and it facilitates charge injection with decreasing the potential barrier under a biased voltage. The cells generate an electroluminescence (EL) of 300 cd m -2 at - 3.8 V. When the molar ratio of TBABF4 to the complex in the device was 2:1, a fast EL response of 0.8 s was obtained at - 4.0 V after the several times of preconditioning. As the quantity of the supporting electrolyte increased, a faster and brighter EL response was obtained. © 2010 Elsevier B.V. All rights reserved.