Document Type

Dissertation - Open Access

Award Date


Degree Name

Doctor of Philosophy (PhD)

Department / School

Electrical Engineering and Computer Science

First Advisor

Quinn Qiao


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.
Grain boundaries.
Photovoltaic cells.



Number of Pages



South Dakota State University



Rights Statement

In Copyright