چكيده به لاتين
The purpose of writing this research is to simulate and investigate the optical effects of plasmonic nanoparticles coupling in CIGS thin film solar cells. Among the second generation of solar cells, CIGS cells have received much attention from photovoltaic field activists due to properties such as: variable energy gap, high absorption coefficient, and stability of electrical properties. The main indicator that the renewable energy activists are interested in is the reduction of production costs at the same time as the increase in productivity. This important issue causes the production and expansion of this industry to use new operational solutions. CIGS as a compound semiconductor made in the laboratory is considered an expensive and rare material, therefore, instead of increasing the thickness of this material in sample production, strategies to reduce the thickness and at the same time increase the production efficiency should be planned and then implemented. to be One of the most important strategies that can be designed and implemented that can lead to more light trapping in the absorber layer is the use of metal nanoparticles. The type, concentration, location and geometry of these nanoparticles are the parameters that determine the change in the final efficiency of the cell. In this research, the FDTD module of the famous Lumerical software was used to observe the optical effects of using plasmonic nanoparticles in the efficiency of CIGS-based solar cells. Considering that the main problem in the current research is to investigate the change in the amount of light absorption in the absorbent layer of the cell due to the injection of metal nanoparticles, some of the most important results of the optical simulation, which are also the basis for obtaining the electrical results, are as follows: 1. Major changes In the absorption spectrum of the absorbent layer due to the injection of nanoparticles, it is near and higher in the infrared spectral region. 2. Compared to spherical nanoparticles, cubic nanoparticles are better candidates for absorbing light at the end of the absorber layer. 3. Injection of spherical nanoparticles at all radii and distances at the end of the absorbent layer causes a decrease in the absorption of the absorbent layer, but injection of cubic nanoparticles mainly increases the absorption of the absorbent layer. 60, 120 nm, increasing the distance between nanoparticles causes a decrease in absorption. 5. In cubic nanoparticles, except in the radius of 90 nm, in other radii of 30, 60, and 120 nm, increasing the distance between the nanoparticles causes a decrease in absorption. 6. Changing the radius of spherical nanoparticles causes the change and displacement of resonance areas in the absorption spectrum, and the maximum amount of absorption can be seen in the radius of 60 nm.
