A new iridium complex containing coumarin derivative as a cyclometalated ligand (1L) and a carbazole-functionalized β-diketonate ( 2L) as the ancillary ligand, namely, Ir(iii)bis(3-(pyridin-2-yl) coumarinato-N,C4)(1-(9-butyl-9H-carbazol-3-yl)-4,4,4-trifluoro- butane-1,3-dionato-O,O) (Ir(1L)2(2L)), w