A 1D optical modeling approach for simulation of white paint films is developed and implemented in the SunShine simulator. The paint film thickness, the pigment volume concentration, and the pigment/binder refractive index ratio, are studied and optimized to achieve the required optical properties for back reflector application. The results indicate that optimized white paint back reflectors exhibit improved reflectivity characteristics which results in an increased long-wavelength quantum efficiency of thin-film silicon solar cells.
COBISS.SI-ID: 8008788
A titanium oxide layer used in a dye-sensitized solar cell has to meet two opponent properties: a large surface area and good connection between TiO2 grains. A new preparation method for TiO2 paste formulation based on sol-gel method and commercial nanocrystalline TiO2 powder has been developed. Results reveal that the paste with X = 8 exhibits the best properties, resulting in an overall conversion efficiency of DSSC under standard test conditions up to 6.6 % for ionic liquid based electrolyte.
COBISS.SI-ID: 7507028
Outdoor performance of PV modules primarily depends on the irradiance and PV module temperature (Tpv). Tpv depends strongly on type of mounting, wind speed and also module type. Open rack mounted and unventilated roof integrated cases of PV module installation are experimentally and theoretically examined. Tpv is also affected by the module’s regime of operation. The Tpv dependency on different regime of operation is reported. Differences are discussed in light of energy balance equation within thermal management, where impact of the PV module conversion efficiency on Tpv is also shown.
COBISS.SI-ID: 7946580
The paper presents a two-dimensional simulation study of a polycrystalline Cu(In,Ga)Se2 (CIGS) solar cell with various shapes of grains inside the CIGS absorber layer. The numerical simulations show that a CIGS cell with column-like grains can achieve a high conversion efficiency (?), while the ? of a CIGS cell with diamond-like grains is low if the valence-band offset at the GBs exceeds 0.4 eV. A favorable valence-band offset mainly depends on the shape of the grains, but it also depends on the NtA.
COBISS.SI-ID: 8259156
We developed a one-dimensional optical model combining plasmonic scattering and thin-film optics to simulate optical properties of thin-film solar cells including metal nano-particles. Scattering models based on dipole oscillations and Mie theory are presented and their integration in thin-film semi-coherent optical descriptions is explained. A proof of modelling concept is given and verified for different fabricated samples including Ag nano-particles.
COBISS.SI-ID: 8095828