Data_Sheet_1_Exploring the Properties of Niobium Oxide Films for Electron Transport Layers in Perovskite Solar Cells.docx

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 Jsc and consequently the device efficiency. In addition, by photoluminescence measurements, we found a better charge transfer from perovskite to TiO2/niobium oxide film deposited at 3.5 sccm of oxygen flow.

本研究采用反应磁控溅射（reactive magnetron sputtering）法，在不同氧气流量条件下制备了氧化铌薄膜，并将其用作钙钛矿太阳能电池（perovskite solar cells）的电子传输层（electron transport layer）。研究发现，当氧气流量为3.5 sccm时制备的薄膜具有更优异的电学性能，可促进光生电子向外部电路的萃取，进而提升短路电流密度（Jsc）与器件的光电转换效率。此外，通过光致发光（photoluminescence）测试，我们发现采用3.5 sccm氧气流量制备的TiO₂/氧化铌薄膜，可实现钙钛矿层与该薄膜间更高效的电荷转移。