Theoretical investigation of application of combining pristine C60 and doped C60 with Silicon and Germanium atoms for solar cells ; A DFT study

Solar energy and its conversion to electricity is an important research in the last decade. Solar cells are consist of a p-type semiconductor as donor and a n-type semiconductor as acceptor. Organic polymers as organic semiconductors are used in an organic solar cell. This research is a theoretical investigation of fullerene C60 as donor and C60 doped derivatives with Silicon and Germanium atoms as acceptors for basic structure of a solar cell. This research is done not only with using related equations but also with investigating theoretical UV -VIS spectrum of the chosen donors-acceptors and their absorption wavelengths, oscillator strength and maximum coefficient absorptions of these solar cells.

Keywords:

Organic solar cell , donor , acceptor , HOMO and LUMO orbitals , C60 , open-circuit voltage , short-circuit current density , fill factor , power output , absorption wavelengths , oscillator strength , maximum coefficientabsorptions , UV-VIS spectrum.