Toshiba LED lighting system for the Louvre "Mona Lisa" 葆 youth
The Schottky Diode is another type of semiconductor diode which can be used in a variety of wave shaping, switching and rectification applications the same as any other junction diode. The main adavantage is that the forward voltage drop of a Schottky Diode is substantially less than the 0.7 volts of the conventional silicon pn-junction diode.
Schottky diodes have many useful applications from rectification, signal conditioning and switching, through to TTL and CMOS logic gates due mainly to their low power and fast switching speeds.
the Schottky Diode also known as a Schottky Barrier Diode is a solid-state semiconductor diode in which a metal electrode and an n-type semiconductor form the diodes ms-junction giving it two major advantages over traditional pn-junction diodes, a faster switching speed, and a low forward bias voltage. Schottky Diode,Schottky barrier diode,schottky rectifiers, Barrier Schottky,SiC Schottky Rectifier,diodes inc Changzhou Changyuan Electronic Co., Ltd. , https://www.changyuanelectronic.com
Nowadays, Mona Lisa provides illumination from a lighting system consisting of 34 LED bulbs to restore the original color of the painting. It is reported that the Louvre held a press conference a few days ago to demonstrate the new system with a replica of the Mona Lisa.
The purpose of this new lighting system is to minimize UV ​​and IR, and to show the original color of the paintings washed away by the years. The Louvre curator and Toshiba worked together to find the best light. 
Toshiba has upgraded the lighting of the Louvre's pyramid building and Red Rooms. The Japanese company said they are upgrading the Napoleon Hall. 
The metal–to-semiconductor or ms-junction provides a much lower knee voltage of typically 0.3 to 0.4 volts compared against a value of 0.6 to 0.9 volts seen in a standard silicon base pn-junction diode for the same value of forward current.
Variations in the metal and semiconductor materials used for their construction means that silicon carbide (SiC) Schottky diodes are able to turn [ON" with with a forward voltage drop as little as 0.2 volts with the Schottky diode replacing the less used germanium diode in many applications requiring a low knee voltage.