High-efficiency orange and yellow organic light-emitting devices using platinum(<scp>II</scp>) complexes containing extended π-conjugated cyclometalated ligands as dopant materials

Abstract

Two luminescent platinum(II) complexes 1 and 2 containing extended π-conjugated cyclometalated ligands have been used as dopant materials for the construction of two high-efficiency organic light-emitting devices I and II. Device I (containing dopant 1) emits orange emission and exhibits a maximum external quantum efficiency of 12.4%, a maximum luminous efficiency of 32.3cd∕A, and a maximum power efficiency of 11.2lm∕W. Device II (containing dopant 2) emits yellow light and exhibits a maximum external quantum efficiency of 16.1%, a maximum luminous efficiency of 51.8cd∕A, and a maximum power efficiency of 23.2lm∕W.