High Optical Performance of Cyan‐Emissive CsPbBr₃ Perovskite Quantum Dots Embedded in Molecular Organogels

Abstract Perovskite quantum dots (PQDs) have fascinating optoelectronic properties, such as high photoluminescence quantum yield (PLQY) for a broad range of materials, and the possibility to obtain different bandgaps with the same material or halide combinations. Nevertheless, blue‐emissive materials generally present limited PLQY or color instability. Here, two molecular organogels, based on a derivative of an amino acid and succinic acid, are used to embed CsPbBr₃ quantum dots, obtaining green and blue emission. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) measurements are performed to confirm that there are no significant changes in the average size of the QDs and the crystal structure. A high near‐unity PLQY is achieved for the blue emission. This contribution opens the door to a postsynthetic treatment for synthesizing blue‐emissive PQDs with high optical performance, which can be attractive for optoelectronic applications.