Lighting device comprising at least two organic luminescent materials

摘要

The invention provides a lighting device (100) comprising a light source (10) and luminescent materials (20). The luminescent materials (20) comprising a first organic luminescent material (120), a second organic luminescent material (220), optionally one or more further organic luminescent materials (320), and optionally one or more further inorganic luminescent materials (420). The light source (10) together with the luminescent materials (20) are configured to generate white lighting device light (101) during operation. The first organic luminescent material (120) degrades with time, the second organic luminescent material degrades with time (220), and the optional one or further organic luminescent materials (320) degrade with time. The luminescent materials (20) are configured to maintain the lighting device light (101) white during operation time of the lighting device (100).