| Abstract [eng] |
The aim of this work was to model the current – voltage characteristics for various types of solar cells under the illumination of different LED – based solar simulator spectra as well as to optimize solar simulator configurations for each type of cell. All simulations were carried out using the “Synopsys TCAD” program package and the built – in templates for each evaluated solar cell. Initial simulations were done with a crystalline (c – Si) Al – BSF solar cell, which, while illuminated with a spectrum of an older standard solar simulator, exhibited excess photocurrent in comparison to being illuminated with the reference “AM1.5G” spectrum. This issue was partially resolved via optimization of the outdated solar simulator in order to conform to new A+ class standards with an equalizing multiplier; however, the most accurate results were achieved through the implementation of A+ class hybrid solar simulators. Subsequent simulations with a single – junction GaAs solar cell showed that illumination with solely LED – based solar simulators can yield relative photocurrent deviations of the less than 1%. Properly optimized hybrid solar simulators for said solar cell were able to achieve similar results. In the case of a dual – junction GaInP/GaAs solar cell, hybrid solar simulators yielded a relative photocurrent deviation of the less than 1%. Optimization of solely LED – based solar simulators for this type of cell was more difficult due to it being composed of essentially two component cells with different external quantum efficiencies; nevertheless, the optimal configuration of a solely LED – based was achieved with a relative photocurrent deviation of the less than 1%. |
