Abstract: A thin film including a combination of a donor compound and an acceptor compound, and a phosphorescent dopant, wherein the donor compound and the acceptor compound form an exciplex having characteristics described in the specification.

Abstract: A condensed-cyclic compound represented by Formula 1: wherein, in Formula 1, Ar11, X1 to X8, and Z11 to Z14 are the same as described in the specification.

Abstract: A condensed cyclic compound represented by Formula 1: wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: A condensed cyclic compound represented by Formula 1: wherein, in Formula 1, rings, groups and variables are the same as defined in the specification.

Abstract: A carbazole compound represented by Formula 1: wherein in Formula 1, groups X1 to X8, X11 to X19, and R41 to R43 are the same as in the specification.

Abstract: A condensed cyclic compound represented by Formulae 1A or 1B: wherein in Formulae 1A and 1B, groups and variables are the same as described in the specification.

Abstract: A condensed cyclic compound represented by Formula 1: wherein in Formula 1, Ar1, L1, L2, X1 to X16, a1, and a2 are the same as described in the specification.

Abstract: An organometallic compound represented by Formula 1: M(L1)n1(L2)n2??Formula 1 wherein in Formula 1, M, L1, L2, n1, and n2 are defined in the detailed description.

Abstract: A keypad lighting arrangement adapted to transmit at least a portion of light emitted from light sources through a keypad so as to facilitate visual recognition of information expressed on keypad members of a keypad includes light sources, a photoluminescent diffusion sheet arranged over the light sources and containing a photoluminescent material for converting light from the light sources and a light-diffusing material for diffusing emitted from the light sources, and a keypad member over the photoluminescent diffusion sheet, wherein the light sources emit blue wavelength light and the photoluminescent diffusion sheet absorbs at least a portion of the blue wavelength light and converts the blue wavelength of light to a different wavelength of light.

Abstract: A light excitation diffusion sheet for a backlight unit adapted to absorb a portion of light emitted from a light source of a blue wavelength or a mixed wavelength of a blue wavelength and at least one other wavelength, to emit light at different wavelengths from the light emitted from the light source, and to allow the rest of the light emitted from the light source to penetrate the sheet The light excitation-diffusion sheet comprises a light-exciting material exciting and amplifying the light from the light source and a light-diffusing material scattering and diffusing the light from the light source. The light-exciting material and the light-diffusing material are uniformly distributed in the light excitation-diffusion sheet The use of the light excitation-diffusion sheet enables production of edge light type and direct light type backlight units having diffusion and prism functions, good color purity and improved light efficiency at reduced costs.