QUANTUM DOTS IN ENCLOSED ENVIRONMENT

摘要

The invention provides a lighting device (100), for providing light (101), comprising a closed chamber (200) with a light transmissive window (210) and a light source (10) configured to provide light source radiation (11) into the chamber (200), wherein the chamber (200) further encloses a wavelength converter (300) configured to convert at least part of the light source radiation (11) into wavelength converter light (301), wherein the light transmissive window (210) is transmissive for the wavelength converter light (301), wherein the wavelength converter (300) comprises luminescent quantum dots (30) which upon excitation with at least part of the light source radiation (11) generate at least part of said wavelength converter light (301), and wherein the closed chamber (200) comprises a filling gas (40) comprising one or more of helium gas, hydrogen gas, nitrogen gas and oxygen gas and having a relative humidity at 19 °C of at least 5%.