Beneficial effects of potassium iodide incorporation on grain boundaries and interfaces of perovskite solar cells.

ABSTRACT: Grain boundaries and interfacial impurities are the main factors that limit the further development of polycrystalline perovskite solar cells because their existence severely deteriorates the device performance. In order to optimize the efficiency of perovskite solar cells, it is essential to eliminate these defects. In the present work, potassium iodide (KI) is incorporated into the perovskite absorber. KI incorporation improves the crystallinity of the perovskite, increases the grain size, and decreases the contact potential distribution at the grain boundary, which are verified by X-ray diffraction, scanning electronic microscopy and Kelvin probe force microscopy. Besides, the activation energy of the recombination, estimated from the temperature dependent current-voltage of perovskite

SUBMITTER: Yang Y 

PROVIDER: S-EPMC9071216 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature