140W USB-C QC4.0+ / PD3.1 FAST GaN LAPTOP CHARGER

Gallium Nitride (GaN) is a material that is starting to be used for semiconductors in chargers. Its main advantage over silicon-based chargers is that it uses less energy when converting from alternating current to direct current, allowing you to charge your devices faster and giving better efficiency. 
GaN also produces less heat, which means components can be packed closer together, so a GaN charger can be made smaller and still provide high power charging for mobile devices.