Tailoring the Grain Boundaries of Wide-bandgap Perovskite Solar Cells by Molecular Engineering
Dissertation - Open Access
Doctor of Philosophy (PhD)
Department / School
Electrical Engineering and Computer Science
Perovskite, Photovoltaics, Semiconductors, Solar Cells, Solar Energy
Due to the attraction of fabricating highly efficient tandem solar cells, wide-bandgap perovskite solar cells have attracted substantial interest in recent years. However, polycrystalline perovskite thin-films show the existence of trap states at grain boundaries, which diminish the optoelectronic properties of the perovskite and thus remains a challenge. This research demonstrates a one-step solution-processing of the [MA0.9Cs0.1Pb(I0.6Br0.4)3] wide-bandgap perovskite using Phenylhydrazine Iodide with amino groups to successfully passivate the trap density within grain boundaries and increase the perovskite grain size. The reinforced morphology and grain boundaries treatment considerably enhanced the photovoltaic performance from an average of 10.7 ±0.6% for pristine to an average of 14.15 ±0.32% for the treated devices. This strategy can be quickly adapted to other perovskites and help realize highly efficient perovskite solar cells.
Library of Congress Subject Headings
Perovskite solar cells.
Number of Pages
South Dakota State University
Emshadi, Khalid, "Tailoring the Grain Boundaries of Wide-bandgap Perovskite Solar Cells by Molecular Engineering" (2020). Electronic Theses and Dissertations. 4092.