Recombination Parameters of the Diffusion Region and Depletion Region for Crystalline Silicon Solar Cells under Different Injection Levels

Abstract

In order to maximize performance in all conditions of use, and to model exactly the performance of solar cells, it is very important to study the recombination parameters under different injection levels. In this paper, the recombination parameters and their effect on the output performance of solar cells are investigated under different injection levels for the full-area aluminum back surface field (Al-BSF) solar cell and passivated emitter and rear cell (PERC) solar cell for the first time. It is found that the recombination parameter J01 of the diffusion region and the recombination parameter J02 of the depletion region for the PERC solar cell are smaller than those of the Al-BSF solar cell under the same injection level. A new finding is that the recombination parameter J01 of Al-BSF solar cells increases quickly with the decreasing injection level compared with PERC solar cells. Finally, the J01/J02 of Al-BSF and PERC solar cells is investigated, and the effects of J01/J02 on the electrical parameters are also analyzed for Al-BSF and PERC solar cells under different injection levels. The obtained conclusions not only clarify the relationship between the recombination parameters and injection levels, but also help to improve cell processes and accurately model daily energy production.

Design and Implementation of Hardware-Implemented Dual-Axis Solar Tracking System for Enhanced Energy Efficiency

“…By analysing the trial results, critical understanding could be obtained into the tracking system's conduct in various situations and identify potential development areas. The results of this experiment may be used to improve the STS model and other applications, such as solar panels and wind turbines, that call for precise and effective orientation with regard to environmental factors [5].…”

Comparative Study of Parameter Extraction from a Solar Cell or a Photovoltaic Module by Combining Metaheuristic Algorithms with Different Simulation Current Calculation Methods

“…In addition, it was also reported that n 2 should be around 1.8 for industrial crystalline silicon solar cells with the pn junctions made by using the conventional thermal diffusion method [22]. According to the DDM parameter results of industrialized crystalline silicon solar cells reported by PV specialists [23][24][25][26][27], series resistance (R s ) is in the range of several mΩ to tens of mΩ, the parallel resistance (R sh ) ranges from tens of Ω to tens of thousands of Ω, the reverse saturation current of diode 1 (I 01 ) is in the range of a few tenths of nA to tens of nA, and the reverse saturation current of diode 2 (I 02 ) ranges from several µA to hundreds of µA. In the parameter-extraction work, by using metaheuristic algorithms, the optimal PV-model parameters (five SDM parameters or seven DDM parameters) are determined by minimizing the RMSE.…”