The absorption of sunlight by conventional solar cells from silicon materials not fully absorb all elements of the sunlight itself but only absorbs the visible spectrum of sunlight. Dual-layer quantum dot solar cell developed by researchers from the University of Toronto, can absorb both visible spectrum of sunlight and infrared or near-infrared part.
The researchers used two colloidal quantum dots (CQS) which have different specifications to improve the efficiency of theoretical junction upto 42 percent. The research team also used a combination of four metal oxide in the transition layer flow to eliminate some losses due to resistance at the junction. The use of transparent oxides will allow sunlight can through the lower of layer.
Technology has been tried in layers on a Tin Oxide coated glass plate in the ambient air and temperature conditions. The research team will also attempt to increasing the efficiency of two layers solar cells up to 10 percent in the next few years.
