Publication date: 15th May 2025
The application of colloidal nanocrystals (NCs) in sophisticated, multi-material devices is held back by challenges in localizing NCs with micro/nano-meter precisions and good reproducibility. Therefore, suitable approaches to pattern NCs must be established to transition from individual proof-of-concept NC devices to integrated and multiplexed technological systems. Our research focuses on developing light-sensitive ligands that enable a variety of NCs (II-VI NCs, metal oxide NCs, perovskite NCs, upconverting nanoparticles, etc.) to be patterned directly with good pattern fidelity while retaining desirable properties. Given that each type of NC possesses unique surface chemistries and properties, we investigate various classes of photosensitive ligands that are suitable for each NC and its applications. We also work toward elucidating these patterning mechanisms by exploring how these photo-induced chemical reactions lead to changes in NC dispersibility. Finally, we utilize these patterning chemistries for the fabrication of various optoelectronic devices, such as photodetectors, diffractive optical elements, and photoswitches.
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