Using Alkyl -Ammonium Iodide as an Organo -Cation in Quantum dot cell solar cells (QDSCs) to increase stability and Hydrophobicity

Alkyl ammonium iodide significantly improves quantum dot solar cells (QDSCs) by acting as a surface passivating agent. This compound helps to reduce surface defects on quantum dots, which are otherwise prone to trapping charge carriers and decreasing the cell's efficiency. By passivating these defects, alkyl ammonium iodide enhances charge carrier mobility and reduces recombination losses, leading to higher power conversion efficiencies. Additionally, it forms a protective layer around the quantum dots, improving their environmental stability by shielding them from moisture and oxygen, thus extending the operational lifetime of the solar cells. The process of using alkyl ammonium iodide in quantum dot solar cells involves a ligand exchange strategy, where the original ligands on the surface of the quantum dots are replaced with alkyl ammonium iodide ligands. This substitution passivates surface defects, reducing trap states that otherwise hinder charge carrier mobility and contribute to recombination losses. Research has shown that this ligand exchange can enhance the power conversion efficiency and stability of the solar cells. Our study reported that the use of alkyl ammonium iodide in the fabrication of these cells resulted in a notable increase in efficiency, recovering up to ۹۰% of their initial performance after extensive testing, which is a significant improvement over untreated cells that degrade more rapidly.

کلیدواژه ها:

Solar cell ، Quantum dot cell ، Alkyl Ammonium iodide ، organic cation