A novel series of four sublimable cationic iridium(III) complexes have been prepared with 1,10-phenanthroline derivatives as ancillary ligands and the same negative counter-ion, tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, which has a large steric hindrance and widely dispersed charges, thereby increasing the ionic radii, reducing the electrostatic interaction, and thus improving the volatility. Their structural, photophysical, electrochemical, and thermal properties have been fully characterized. Upon excitation, these compounds show polychromic emission varying from green to orange in solution, which are blue-shifted in the solid state to different extents due to π–π conjugate effects in the ancillary ligands and the resulting molecular aggregation. OLEDs fabricated by vacuum evaporation deposition demonstrated desirable device performance with high efficiency and brightness, exhibiting various electroluminescent colors dependent upon doping concentration. Simply sublime! A novel series of sublimable cationic iridium(III) complexes with 1,10-phenanthroline derivatives as ancillary ligands and the same bulky negative counter-ion have been prepared and used to fabricate highly efficient polychromic OLEDs by vacuum evaporation deposition (see figure). This work provides a new and promising material system containing evaporable charged phosphorescent emitters for use in organic electronics.

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evaporable charged phosphorescent emitters polychromic emission electroluminescent colors aggregation oleds conjugate effects cationic iridiumiii complexes organic electronics structural photophysical electrochemical 110phenanthroline derivatives vacuum evaporation deposition electrostatic interaction ancillary ligands ionic radii negative counterion tetrakis35bistrifluoromethylphenylborate

Lian Duan,Dongxin Ma, Chen Zhang, Yong Qiu,.Sublimable Cationic Iridium(III) Complexes with 1,10-Phenanthroline Derivatives as Ancillary Ligands for Highly Efficient and Polychromic Electroluminescence. 22 (39),.

Lian Duan, et al."Sublimable Cationic Iridium(III) Complexes with 1,10-Phenanthroline Derivatives as Ancillary Ligands for Highly Efficient and Polychromic Electroluminescence" 22

Lian Duan,Dongxin Ma, Chen Zhang, Yong Qiu,"Sublimable Cationic Iridium(III) Complexes with 1,10-Phenanthroline Derivatives as Ancillary Ligands for Highly Efficient and Polychromic Electroluminescence"