An efficient luminescence conversion LED for white light emission, fabricated using a commercial InGaN LED and a 1,8-naphthalimide derivative

A luminescence conversion light emitting diode was fabricated, using an InGaN LED and 4-N,N-diphenyl-9-(4-tert-butylphenyl)-1,8-naphthalimide, as the primary light source and LUCO material, respectively. The emission of very bright white light was observed at a current of 20 mA, with CIE chromaticity coordinates of (0.32, 0.33) and conversion efficiency of 82%.