Wavelength-scale analysis of influence of chirped DBRs on optical characteristics of multinanolayer photovoltaic cells

An electromagnetic wavelength-scale numerical analysis of optical characteristics of multinanolayer photovoltaic (PV) cells based on Si p-i-n type absorber with non-periodic (chirped) distributed Bragg reflector (DBR) on the top of the structure mounted on a metallic layer and SiO
₂
substrate is performed. Computer modelling of absorbing, reflecting and transmitting characteristics of multinanolayer PV cells with chirped DBR mirrors is performed by the method of single expression (MSE). Influence of layers of chirped DBRs on optical characteristics of multinanolayer PV cells is analysed by observing the localization of the electric component of optical field and power flow distribution within the structures. The modelling results will have a scientific and practical importance for optimization of operation of thin-film multinanolayer PV cells with broadband resonant reflectors on the subject of enhancement of their efficiency.