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Lead halide perovskite nanocrystals (LHPs) have become a promising optoelectronic material due to their bright photoluminescence, low manufacturing cost, and application in solar cells and light emitting diodes (LEDs). Quantum yield (QY) is a metric used to quantify the efficiency by which they emit light, defined as the ratio of number of photons emitted to those absorbed. Currently there are several commonly used routes for synthesizing LHPs, including the hot injection (HI) and room temperature supersaturated recrystallization (SR) methods. Each technique presents its own challenges in the form of high operating temperatures, low stability of resulting LHPs, or lack of precise control over the synthesis process. Developments have been made toward a new synthesis technique, using a microwave reactor to produce highly stable and luminescent perovskites. This microwave synthesis allows for the precise control of operating parameters while being simpler than traditional methods since it is a one-pot technique. In order to fully optimize a microwave synthesis for LHPs, work must be done to improve the purification procedure. Purification is a necessary step in the synthesis of LHPs as it allows for better analysis of optical properties and can even improve QY. Herein, we attempt to further optimize perovskites produced via microwave synthesis by comparing different purification techniques to determine which produces the most luminescent QDs.



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Optimizing the Purification Process for Microwave Synthesized Lead Halide Perovskites