On-Site Synthesis of Halide Perovskite Nanocrystals with Sub-50 nm Positional Accuracy
Metal halide perovskites comprise a promising class of semiconductors with broad applications ranging from optoelectronics and photovoltaics to photocatalysis. To extend these applications to on-chip devices, on-site growth of perovskite nanocrystals with high positional accuracy must be achieved. I...
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| Format: | Thesis |
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Massachusetts Institute of Technology
2022
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| Online Access: | https://hdl.handle.net/1721.1/144765 https://orcid.org/0000-0003-2664-7606 |
| Summary: | Metal halide perovskites comprise a promising class of semiconductors with broad applications ranging from optoelectronics and photovoltaics to photocatalysis. To extend these applications to on-chip devices, on-site growth of perovskite nanocrystals with high positional accuracy must be achieved. In this thesis, we demonstrate a method for growing sub-50 nm halide perovskite nanocrystals with sub-50 nm positional accuracy. We first explore how local forces can be engineered to control particle positioning at the nanoscale. We then show how our parameters of control - namely template geometry and solvent contact angle - can be utilized to position nanocrystals within lithographic templates. This thesis reveals a unique strategy that overcomes the limitations of conventional lithographic processes for high-resolution growth of halide perovskites. |
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