Perovskites With Nanoparticles For Solar Cell Applications

The CsPbBr2Cl and composite CsPbBr2Cl:ZnO thin films were fabricated via low-temperature, solution-processed full doctor blade method. The surface morphology and crystallinity of the synthesized thin films were investigated by XRD, SEM and EDX. UV-Visible and photoluminescence measurements were performed to study the optical properties of the synthesized thin films. The composite system showed red shift and comparatively smaller bandgap with sharp PL emission, which can be attributed to the formation of CsPbBr2Cl:ZnO. Compositional analyses of prepared films were analyzed by FTIR analysis. This study revealed that the incorporation of zinc oxide (ZnO) nanoparticles NPs into the CsPbBr2Cl precursor solution enhanced the optical and morphological properties of perovskite. By introducing an appropriate amount of ZnO NPs into CsPbBr2Cl perovskite precursor solution, more compact, smooth, uniform, pinholes-free, thin films with good surface coverage, enhanced crystallization, larger grains and better optoelectronic properties can be obtained.