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Glutathione Modified Gold Nanoparticles for Sensitive Colorimetric Detection of Pb2+ Ions in Rainwater Polluted by Leaking Perovskite Solar Cells
journal contribution
posted on 2016-11-23, 00:00 authored by Yaming Yu, Ying Hong, Peng Gao, Mohammad Khaja NazeeruddinIn
the past few years, the advent of lead halide perovskite solar
cells (PSCs) has revolutionized the prospects of the third- generation
photovoltaics and the reported power conversion efficiency (PCE) has
been updated to 22%. Nevertheless, two main challenges, including
the poisonous content of Pb and the vexing instability toward water,
still lie between the lab-based PSCs technology and large scale commercialization.
With this background, we first evaluated Pb2+ concentration
from the rainwater samples polluted by three types of markets promising
PSCs with inductively coupled plasma mass spectrometry measurements
(ICP-MS) as a case study. The influence of possible conditions (pH
value and exposure time) on the contents of Pb2+ from the
three PSCs was systematically compared and discussed. Furthermore,
an optimized glutathione functionalized gold nanoparticles (GSH-AuNPs)
colorimetric sensing assay was used to determine Pb2+ leaking
from PSCs for the first time. The Pb2+-induced aggregation
of sensing assay could be monitored via both naked eye and UV–vis
spectroscopy with a detection limit of 15 and 13 nM, which are all
lower than the maximum level in drinking water permitted by WHO. The
quantitative detection results were compared and in good agreement
with that of ICP-MS. The results indicate that the content of Pb2+ from three PSCs are in the same order of magnitude under
various conditions. By the use of the prepared GSH-AuNPs self-assembled
sensing assay, the fast and on-site detection of Pb2+ from
PSCs can be realized.
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exposure timedetection limitcase studyassaypH valueGlutathione Modified Gold Nanoparticles13 nMpower conversion efficiencyPbPCEcontentdetection resultsdrinking waterUVLeaking Perovskite Solar CellsGSH-AuNPs self-assembledgeneration photovoltaicsSensitive Colorimetric Detectionhalide perovskiterainwater sampleslab-based PSCs technologyRainwater Pollutedoptimized glutathione functionalized gold nanoparticlesICP-MSplasma mass spectrometry measurementsscale commercialization
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