| Summary: | Perovskite quantum dots (PQDs) have shown great promise in optoelectronic device applications. Typically, a traditional hot-injection method with heating and high vacuum pressure is used to synthesize these colloidal nanoparticles. In this article, we report a low-cost synthetic method for FAPbI<sub>3</sub> PQDs in air at atmospheric pressure with the assistance of ZnI<sub>2</sub>. Compared with the FAPbI<sub>3</sub> PQDs synthesized under vacuum/N<sub>2</sub> condition, the air-synthesized Zn:FAPbI<sub>3</sub> PQDs exhibit the same crystalline structure with a similar preferential crystallographic orientation but demonstrate higher colloidal stability and higher production yield. Furthermore, we examine the influence of ZnI<sub>2</sub> during the synthesis process on morphologies and optoelectronic properties. The results show that the mean size of the obtained FAPbI<sub>3</sub> PQDs is decreased by increasing the amount of added ZnI<sub>2</sub>. More importantly, introducing an optimal amount of ZnI<sub>2</sub> into the Pb source precursor enables increasing the carrier lifetime of FAPbI<sub>3</sub> PQDs, showing the potential beneficial effect on device performance.
|
|---|