Retracted Article: Controllable color emission of platinum(ii) complexes and their application in light-emitting diodes (LEDs)

Abstract

A series of platinum(II) complexes with controllable color emission obtained by regulating intra/intermolecular interactions have been synthesized. These complexes are highly emissive both in solution and in the solid state with microsecond lifetimes, attributed to the single molecular (³IL), excimer, and aggregation emission from their different excited states. All complexes display interesting color changeable photoluminescence depending on concentrations, excitation wavelengths, and good/poor solvents, and exhibit reversible vapochromic/mechanochromic behaviors, which are applicable in emission readable barcode modules and color changeable logo design. Furthermore, using the complexes as emitting materials coated on commercial NUV-LED chips, bright yellow to orange luminescence with a maximum output of 8434 cd m⁻² and external quantum efficiency (EQE) of 2.58% could be achieved, providing a facile method to apply platinum(II) complexes in the solid state lighting field.