Journal
ACS OMEGA
Volume 2, Issue 8, Pages 4341-4346Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.7b00496
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Funding
- National Natural Science Foundation of China [21475088, 21507087]
- Yangfan Program of Shanghai Science and Technology Committee [15YF1409000]
- International Joint Laboratory on Resource Chemistry (IJLRC)
- State Key Laboratory of Environmental Chemistry and Ecotoxicology
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In this work, a photoelectrochemical (PEC) sensing system was developed for chemical detection without any tags. The system is based on methylammonium lead iodide chloride perovskite as the photoelectrochemical signal-generating molecule, tin oxide nanoparticles (SnO2) as the electron transport layer, and ionic liquid of 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) as the stabilizer and electrolyte. The photosensitizer film is formed through spin-coating followed by low-temperature sintering. Upon irradiation with 473 nm light, an anodic photocurrent is generated in a blank electrolyte and changed significantly after addition of hemin into the electrolyte. The change of photocurrent after addition of hemin suggested that the chemicals participated in a photoelectrochemical process. Our work paves the way to developing analytical methods with perovskite.
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