The Effect of Substrate Hydrophobic and Post-processing on the Inkjet Printing Perovskite Microarrays

Abstract

Metal halide perovskites (MHPs) have excellent optical properties such as good color purity, high photoluminescence quantum efficiency and low manufacturing cost. Inkjet printing （IJP） is a powerful technique to achieve high-density pixelated perovskite microarrays. During the IJP process, the substrate hydrophobic and the post-processing conditions have a great impact on the morphological and optical properties of the microarrays. In this work, we study the effect of substrate hydrophobicity as well as the post-processing conditions on the IJP perovskite microarrays, and successfully prepare perovskite microarrays with 4 μm of thickness and good morphology. The microarrays with 45μm diameter exhibit high photoluminescence quantum yield (PLQY) of 41%.