| AVS 55th International Symposium & Exhibition | |
| Energy Science and Technology Focus Topic | Tuesday Sessions |
| Session EN-TuP |
| Session: | Energy Focus Topic Poster Session |
| Presenter: | S. Maslov, University of Florida |
| Authors: | S. Maslov, University of Florida D. Bera, University of Florida L. Qian, University of Florida P.H. Holloway, University of Florida |
| Correspondent: | Click to Email |
High performance blue and white organic light emitting diodes (OLED) offer improved efficiencies for solid state lighting. A down converting phosphor layer allows color tuning capabilities when coupled with a blue emitting OLED, and leads to improved efficacies approaching 80 lm/watt. The efficacy, CIE color coordinates, color rendering index, and angle resolved photoluminescence intensity were characterized versus film thickness and phosphor weight fraction. Due to scattering by phosphor particles, the initially forward focused light is converted to a Lambertian distribution of intensity. The method for applying powder thin films will be illustrated and discussed. The advantages and disadvantages of PMMA versus silicones for the dispersion matrix will be reported. Optimum phosphor layers were those with high quantum yield and maximum light out coupling.