With innovative copper nano-alloy technology, Quantum Bionics successfully commercialized the building energy efficiency improvement material in the form of window film product: Thor QY 729. Through quantum dot effect, Thor QY 729 window film can shield the heat energy from the sun’ light waves up to 90% of effect (TSER: Total Solar Energy Rejected). Solution is highly cost competitive as the film is single layered low carbon footprint product. By utilizing copper metal nanopowder wet coating technology, manufacturing process is also low-carbon and eco-friendly.