Tandem Perovskites materials with solar cells
Board Location: #52
Discipline: Chemistry and Chemical Sciences
Subcategory: Materials Science
Session: 2
Jameal Lee - Livingstone University
Co-Author(s): Gordon Miller, Livingstone University, North Carolina
Perovskite materials have emerged as promising candidates for a wide range of opto-electronic applications, including solar cells. Among the various perovskite composition those incorporating halide ions, such as bromine and iodine, have made strides in improving the open circuit voltage of perovskite solar cells. This study presents a comparative analysis of bromine-based (Br-based), iodine-based (I-based), and tandem perovskite materials in the solid-state, focusing on their ability to absorb light in order to create an electric charge. The investigation begins by exploring the potential light absorption of Br-based and I-based perovskite by examining the voltages produced by the manufactured solar cells and measuring the absorption spectra of the solutions the solar were made from, bringing attention on how tandem composition influences the performance of both ions together rather than just separate. Furthermore, the stability and environmental sensitivity of these perovskite materials are discussed in the context of practical device applications. The solar cells made of a perovskite crystal that was composed of 50% Br and 50% I gave an open circuit voltage of 326 mV ± 112 mV, while the perovskite cells made of 100% I gave 154mV ± 62 mV. The data indicates that broadening the absorption spectrum enhances the open circuit voltage. Future work will entail manufacturing solid state perovskite of various Br:I ratios and measuring the absorption spectrum in the solid state. Utilizing solvent-solvent extraction method for producing solid materials forms cells of thin enough coatings to allow absorption measurements. This comparative analysis provides valuable insights into the unique characteristics and trade-offs associated with Br-based and I-based perovskite materials in the solid-state, offering a foundation for researchers and engineers to make informed decisions when selecting perovskite compositions for specific opto-electronic applications. Ultimately, this research contributes to the ongoing development and optimization of perovskite-based devices assisting in an introduction to a more cost reasonable solar cell, aiming to accelerate the integration of these materials into next-generation technologies. The author wishes to thank NSF for funding the research through Award # 2107022.
Funder Acknowledgement(s): NSF Funds our research
Faculty Advisor: Gordon Miller, Gmiller@livingstone.edu
Role: I did most of the lab, including the making of the solutions, measuring the absorbtion, and most the testing the results.