Optical Modelling of Solution Processed All-Perovskite Triple Junction Solar Cells

• Main Authors: Purkayastha, Atanu, Mallajosyula, Arun Tej
• Format: Conference Proceeding
• Language: English
• Subjects: Absorption; Efficiency limit; Junctions; Optical reflection; Optical refraction; Optical variables control; Organic inorganic hybrid perovskite; Photoconductivity; Photonic band gap; Photovoltaic cells; Photovoltaic systems; Reflection; Refractive index; Tandem solar cell; Transfer matrix method
• ISSN: 2995-1755
• DOI: 10.1109/PVSC57443.2024.10749552

In this research work, we present the development of two sophisticated coding algorithms grounded in the transfer matrix method using MATLAB. These algorithms, characterized by their generality, offer a versatile tool for optimizing a wide range of solution-processed triple junction solar cells (TJSC). The focal point of our investigation involves the application of these algorithms to enhance the performance of solution-processed all-perovskite (all-OIHP) TJSC. The algorithms leverage the wavelength-dependent complex refractive indices of all layers, obtained from existing literature, as input parameters. Our findings showcase a remarkable improvement in the maximum matched photocurrent density for the high, middle, and low bandgap sub-cells, reaching values of 8.86, 8.86, and 8.76 mA.cm -2 , respectively. A pivotal outcome is the calculated minimum reflection loss of 8.96 m.A.cm -2 , representing a substantial reduction of 2.50 mA.cm- 2 compared to literature values. Delving deeper into our analysis, we unveil the intricacies of parasitic absorption loss, quantified at 8.14 mA.cm -2 . Notably, this absorption loss is predominantly attributed to the PTAA in the middle sub-cells and C 60 in the high bandgap sub-cell. Our comprehensive approach not only optimizes the overall performance of the all-OIHP TJSC but also sheds light on the specific contributions of various layers to parasitic absorption.