Luminescent solar concentrator (LSC) collects sunlight equivalently through the effect of planar optical waveguide, and cuts the cost of photovoltaic electricity generation by reducing the consumption of solar cells. Quantum dot (QD) LSC is fabricated by sandwiching colloidal PbS QDs hexane solution in two glasses to form solution sandwiching planar waveguide and coupling commercial monocrystalline Si solar cells whose efficiency is 17%. The QD-LSC absorbs the 700~1100 nm near infrared solar radiation and its standard efficiency is about 1.31%.