Investigating a simple and sustainable photoluminescence improvement approach of highly applicable perovskite-ZIF-8 composite by using water

Abstract

Photoluminescent materials' importance for daily human life attracts researchers to develop them. As one of the high applicability photoluminescent materials, cesium lead bromide (CsPbBr3) perovskite phosphor must be designed to overcome its instability toward the water. Herein, we utilized zeolitic imidazolate framework-8 (ZIF-8) to support the perovskite photoluminescence intensity and stability to prepare a hybrid perovskite-ZIF-8 composite to perform better. This material was developed by improving its photoluminescence uniquely by stirring in the water as perovskite is unstable toward the water. Here, we also focused on the possible reasons to explain this phenomenon. Energy transfer from ZIF-8 to perovskite, zinc from ZIF-8 ability to dope and de-dope perovskite crystal, perovskite re-crystallization into another type, size, and morphology of perovskite, and some supporting byproducts formation after stirred in the water might be responsible for this enhancement and in the composite. The stability of this improved photoluminescence composite reached three months, and even its luminescence intensity could be repaired when decreased by stirring it in water and drying it again. Finally, this approach can contribute to green technology implementation as it does not need harmful chemicals, instead only water and is applicable for photoluminescence-related applications such as light emitting diodes and fluorescence sensors.