The present disclosure relates to an emissive construct, which can be used in various OLED applications, for example, top-emission white organic light-emitting diodes. The emissive construct can include an optional second fluorescent emissive layer having an emitter with a second T1, a first fluorescent emissive layer having an emitter with a first T1, the first T1 being greater than the second T1 value, a hole-blocking layer, and a phosphorescent emissive layer.