NOVELTY - A metal complex (I) is new.    USE - Metal complex is used for emitting layer for organic electronic device for apparatus e.g. stationary visual display unit such as visual display unit of computer, television, visual display unit in printer, kitchen appliance and advertising panel, illumination device, information panel, and mobile visual display unit such as visual display unit in cellphone, laptop, digital camera, MPEG audiolayer-3 player, vehicle and destination display on bus and train, illumination unit, keyboard, material of clothing, furniture and wallpaper, electrophotographic photoreceptor, photoelectric converter, organic solar cell (organic photovoltaic), switching element, organic light emitting field effect transistor, image sensor, dye laser and electroluminescent device (all claimed).    ADVANTAGE - The metal complex shows high emission efficiency, temperature stability of emission color, and charge carrier mobility, and excellent vaporizability, thermal stability and processing stability. The organic electronic device containing the metal complex has reduced turn-on voltage.    DETAILED DESCRIPTION - A metal complex of formula (I) is new.    R1=H, 3-8C cycloalkyl (optionally substituted by 1-8C alkyl or 1-8C perfluoroalkyl), 1-8C alkyl or group of formulae (a)-(p);    R2=H or 1-8C alkyl;    or R1+R2=-(CH2)3- or -(CH2)4- (both optionally substituted by 1-8C alkyl or 1-8C perfluoroalkyl);    R3,R8=1-8C alkyl, -Si(1-8C alkyl)3, or 3-8C cycloalkyl;    n1=0, or 1-5;    n3=0, or 1-4;    Y'=-O-, -S-, -NR30-, or -CR31R32-;    R4=1-8C alkyl, cyclohexyl, F, 1-8C perfluoroalkyl or NR7R9;    R'4=H, 1-8C alkyl, cyclohexyl or 1-8C perfluoroalkyl;    R5,R6=1-8C alkyl or cyclohexyl;    R7,R9=group of formulae (q)-(s);    R111,R'11, R"11=1-8C alkyl or 1-8C alkoxy;    or R7+R9+N=group of formula (t);    m'=0, 1 or 2;    m"=0, 1 , 2 or 3;    R10=1-8C alkyl or 3-8C cycloalkyl;    R30=1-8C alkyl or group (q)-(s);    n2,p1=0, or 1-3;    p2,p3=0, or 1-2;    R31,R32=H, 1-18C alkyl, 7-25C arylalkyl or phenyl (optionally substituted by 1-8C alkyl or 1-8C alkoxy);    M=Pt, Pd, Rh, Ir or Re;and    L=mono- or bi-dentate ligand.    (i) When L is monodentate ligand and M is Pd or Pt, m is 0 or 2 and n is 1 or 2; (ii) When L is monodentate ligand and M is Rh, Ir or Re, m is 0, 2, or 4 and n is 1, 2 or 3; (iii) When L is bidentate ligand and M is Pd or Pt, m is 0 or 1 and n is 1 or 2; and (iv) When L is bidentate ligand and M is Rh, Ir or Re, m is 0, 1 or 2 and n is 1, 2 or 3. INDEPENDENT CLAIMS are included for the following:    (1) emitting layer, which contains the metal complex; and    (2) iridium complex of formula (II) or (III).    X=H, methyl or ethyl;    La'=group of formula (y).