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Sphere‐supported thin‐film electroluminescence: A new platform technology for displays and lighting

Abstract— Currently, powder electroluminescence is used for low‐brightness flexible lamps offering durable plastic‐based lighting solutions principally for low‐ambient light conditions where lighting or backlighting is required. Sphere‐supported thin‐film electroluminescence (SSTFEL) promises dramatic new capability in both flexible lamps and displays owing to its high brightness and long‐life capability. SSTFEL is based on robust thin‐film phosphors deposited on spherical ceramic dielectric particles which are embedded in a thin plastic sheet. A printing approach permits versatile, low‐cost manufacturing of patterned SSTFEL devices and eliminates the need for high‐temperature substrates.