ao7b00496_si_001.pdf (882.27 kB)
EMIMBF4‑Assisted SnO2‑Based Planar Perovskite Films for Label-Free Photoelectrochemical Sensing
journal contribution
posted on 2017-08-08, 17:03 authored by Jianying Pei, Yiping Wu, Xiaoyu Guo, Ye Ying, Ying Wen, Haifeng YangIn 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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SnO 2tin oxide nanoparticleselectrolytePECLabel-Free Photoelectrochemicalphotosensitizer filmelectron transport layer473 nm lightheminchemical detectionphotoelectrochemical signal-generating moleculephotoelectrochemical processPlanar Perovskite Filmsanodic photocurrentEMIMBF 41- ethyl -3-methylimidazolium tetrafluoroborateiodide chloride perovskite
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