2.2. CdTe based quantum dots solar cells
Nanotechnology and quantum dots (nano-sized semiconductor
particle) have been introduced into solar cells in order to further
increase their efficiency above the theoretical limit set by Shockley–Queisser
thermodynamics [51]. The properties of quantum
dots are size dependent with extraordinary tunable band gaps,
high extinction coefficient, and most importantly multiple exciton
generation [52]. It was reported that the band gap of CdTe can be
tuned to a desirable value by altering the size of the quantum dot
to match the desired band gap range [53]