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.

کلیدواژه ها:

Quantum dot ، CdSe ، Graphene ، Solar cell