Tunable perovskite-based photodetectors in optical sensing
Sensors and Actuators B: Chemical, ISSN: 0925-4005, Vol: 321, Page: 128462
2020
- 12Citations
- 19Captures
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Article Description
Broad- and narrow-band, tunable perovskite photodetectors (PPDs) with size-dependent fast response times are demonstrated for the first time in optical sensing of analytes, including gas-phase and dissolved oxygen (DO), as well as glucose. The sensors included a LED excitation source and a polystyrene film with embedded oxygen-sensitive dyes, PtOEP or PdOEP. The analyte’s dose-dependent photoluminescence (PL) intensity I and decay time τ were measured. Using the PPDs enabled monitoring gas-phase O 2 at levels of 0 %–100 % with a sensitivity comparable to that of a Si photodiode. A broad dynamic range was similarly observed for DO monitoring and the limit of detection for glucose monitoring was ∼0.02 mM at an initial level of ∼0.26 mM DO. Importantly, the size-dependent fast response time of the PPDs enabled analyte monitoring via the preferred measurement of τ, rather than I, over a broad dynamic range, which was unattainable with organic photodetectors. The use of the narrow-band PPDs eliminated the need for optical filters, which leads to more compact device designs.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0925400520308078; http://dx.doi.org/10.1016/j.snb.2020.128462; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85086733968&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0925400520308078; https://api.elsevier.com/content/article/PII:S0925400520308078?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S0925400520308078?httpAccept=text/plain; https://dul.usage.elsevier.com/doi/; https://dx.doi.org/10.1016/j.snb.2020.128462
Elsevier BV
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