Enhancement performance of CdSe quantum dot based solar cells influence of graphene nanoparticles

This paper reports investigation of the influence of 2 wt.% graphene in TiO2 semiconductor layer on the performances of CdSe quantum dot based solar cells. At 1 sun illumination, the efficiency η ranged from 0.03 to 0.11%. Also, results showed reduction the parasitic resistances effects such as series and shunt resistances. The electron diffusion coefficient Dn and lifetime τn are determined from the non-linear least squares fitting method at open circuit voltage decay under the Nd:YAG laser pulses. The results and analysis from measurements shows increasing Dn, τn, electron mobility µ and diffusion length Ln. As the result, investigations indicative the reduction of recombination centers due to specific electrical properties of the graphene and improvement performance of the solar cell.

Keywords:

Quantum dot , CdSe , Graphene , Solar cell