AUTHOR=Fernandes Silvia Leticia , Albano Luiz Gustavo Simão , Affonço Lucas Jorge , Silva José Humberto Dias da , Longo Elson , Graeff Carlos Frederico de Oliveira 

TITLE=Exploring the Properties of Niobium Oxide Films for Electron Transport Layers in Perovskite Solar Cells

JOURNAL=Frontiers in Chemistry

VOLUME=7

YEAR=2019

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2019.00050

DOI=10.3389/fchem.2019.00050

ISSN=2296-2646

ABSTRACT=<p>In this work, niobium oxide films were deposited by reactive magnetron sputtering under different oxygen flow rate and applied as electron transport layer in perovskite solar cells. It was found that the deposition made using 3.5 sccm of oxygen flow resulted in films with better electrical properties which helped the extraction of the photogenerated electrons to the external circuit, improving the J<sub>sc</sub> and consequently the device efficiency. In addition, by photoluminescence measurements, we found a better charge transfer from perovskite to TiO<sub>2</sub>/niobium oxide film deposited at 3.5 sccm of oxygen flow.</p>