EMIMBF<sub>4</sub>‑Assisted SnO<sub>2</sub>‑Based Planar
Perovskite Films for Label-Free Photoelectrochemical
Sensing
Jianying Pei
Yiping Wu
Xiaoyu Guo
Ye Ying
Ying Wen
Haifeng Yang
10.1021/acsomega.7b00496.s001
https://acs.figshare.com/articles/journal_contribution/EMIMBF_sub_4_sub_Assisted_SnO_sub_2_sub_Based_Planar_Perovskite_Films_for_Label-Free_Photoelectrochemical_Sensing/5286028
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 (SnO<sub>2</sub>) as the electron
transport layer, and ionic liquid of 1-ethyl-3-methylimidazolium tetrafluoroborate
(EMIMBF<sub>4</sub>) 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.
2017-08-08 17:03:55
SnO 2
tin oxide nanoparticles
electrolyte
PEC
Label-Free Photoelectrochemical
photosensitizer film
electron transport layer
473 nm light
hemin
chemical detection
photoelectrochemical signal-generating molecule
photoelectrochemical process
Planar Perovskite Films
anodic photocurrent
EMIMBF 4
1- ethyl -3-methylimidazolium tetrafluoroborate
iodide chloride perovskite