Perovskite-nanocrystal-enhanced vertically stacked photodiode image sensor for wavelength-resolved UV imaging

Real-time ultraviolet (UV) image sensing technology presents profound potential in multiple areas, including biomedical diagnostics, industrial production, and animal science. Current UV imaging systems are mostly monochromatic, hence insensitive to the spectral information across the UV wavelengths. This thesis introduces a novel imaging system capable of multispectral UV imaging with the ability to distinguish between different UV wavelengths by enhancing a three-layer vertically stacked photodiode complementary metal oxide semiconductor (CMOS) image sensor with specially manufactured and tuned perovskite nanocrystals (PNCs). The effectively extended multi-channel quantum efficiency (QE) in the UV range enabled experimentally proved precise separation of 11 distinct UV wavelengths across the UVA and UVB range, an unachieved level with the unmodified image sensor. This novel imaging system presents meaningful applications for clinical and industrial contexts, including the in vitro characterization of biomarkers with UV fluorescence emission signatures.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois Urbana-Champaign

Year dc:date

2025

Author dc:creator

• Chang, Haoxiang

Contributors dc:contributor

• Gruev, Viktor

• Perovskite Nanocrystals
• Nanomaterials
• Multispectral Uv Imaging
• Biosensors
• Fluorescence Imaging

Statement dc:rights

• Copyright 2025 Haoxiang Chang

Language dc:language

en, eng

Handle dc:identifier

https://hdl.handle.net/2142/130219

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F130219