TECHNOLOGY FOCUS - ELECTRONICS - Preferred Device: The first device further comprises a second emissive dopant having a peak wavelength of 400 to 500 nanometers. The first device further comprises a first organic light-emitting device comprising a compound (I) and a second light emitting device separate from the first organic light-emitting device comprising an emissive dopant having a peak wavelength of 400 to 500 nanometers. The first device comprises an organic-light emitting device having a first emissive layer and a second emissive layer, where the first emissive layer comprises compound (I) and the second emissive layer comprises an emissive dopant having a peak wavelength of 400 to 500 nanometers. Preferred Components: The organic layer is an emissive layer and the compound is an emissive dopant. The organic layer is an emissive layer and the compound is a non-emissive dopant. The organic layer further comprises a host. The host comprises a triphenylene containing benzo-fused thiophene or benzo-fused furan, where any substituent in the host is an unfused substituent selected from Cn'H2n'+1, OCn'H2n'+1, OAr1, N(Cn'H2n'+1)2, N(Ar1)(Ar2), CH=CH-Cn'H2n'+1, C?=CHCn'H2n'+1, Ar1, Ar1-Ar2, Cn'H2n'-Ar1, or no substitution. The host is 4-(3-triphenylen-2-yl-phenyl)-dibenzothiophene (Ib). The host is a metal complex. The second emissive dopant is a fluorescent emitter or is a phosphorescent emitter.n'=1-10;Ar1 and Ar2=benzene, biphenyl, naphthalene, triphenylene, carbazole, and/or heteroaromatic analogs.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No general preparation given. Preferred Definitions:    R2=optionally substituted aryl (preferably 2,6-disubstituted aryl, especially 2,6-diisopropylphenyl) or alkyl;    R3 and R4=H or alkyl (preferably H);    R5 and R6=H, alkyl or aryl (preferably H);    R1=H.    At least one of R3, R4, R5 and R6 is alkyl.    SPECIFIC COMPOUNDS - 100 Compounds are specifically claimed as the iridium complex (I) e.g. ((2-(1-methylbenzoimidazol-2-yl)phenyl)2) Iridium (2-(4-phenylpyridin-2-yl)phenyl), (2-(1-methylbenzoimidazol-2-yl)phenyl) Iridium (2-(4-phenylpyridin-2-yl)phenyl)2, ((2-(1-isopropylbenzoimidazol-2-yl)phenyl)2) Iridium (2-(4-phenylpyridin-2-yl)phenyl), (2-(1-isopropylbenzoimidazol-2-yl)phenyl) Iridium (2-(4-phenylpyridin-2-yl)phenyl)2 and ((2-(1-(2,6-diisopropylphenyl)benzoimidazol-2-yl)phenyl)2) Iridium (2-(4-phenylpyridin-2-yl)phenyl) of formula (I').    EXAMPLE - To a flask was added iridium triflate complex (3.5 g) and 2,4-diphenylpyridine (3.5 g), 25 ml EtOH and 25 ml MeOH. The reaction mixture was refluxed for 18 hours, with a yellow-orange precipitate forming. The reaction mixture was cooled to room temperature, diluted with ethanol, was filtered through Celite (RTM: filter) and the mixture stirred for 10 minutes. The mixture was filtered on a small silica gel plug on a frit and washed with ethanol (3-4 times) and with hexane (3-4 times). The filtrate was discarded. The celite/silica plug was then washed with dichloromethane to dissolve the product. Half the volume of dichloromethane was removed under reduced pressure and isopropanol was added to precipitate the product, which was filtered and washed with methanol and hexane. The crude product was chromatographed on silica gel with 1/1 (vol./vol.) dichloromethane/hexane and then sublimed to yield 1.9 g (54%) of iridium complex ((2-(1-(2,6-diisopropylphenyl)benzoimidazol-2-yl)phenyl)2) Iridium (2-(4-phenylpyridin-2-yl)phenyl) (I') as a yellow solid. The complex (I') was confirmed by HPLC (99.9% pure) and LC/MS.