Yu, Yaming Hong, Ying Gao, Peng Nazeeruddin, Mohammad Khaja Glutathione Modified Gold Nanoparticles for Sensitive Colorimetric Detection of Pb<sup>2+</sup> Ions in Rainwater Polluted by Leaking Perovskite Solar Cells In 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 Pb<sup>2+</sup> 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 Pb<sup>2+</sup> 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 Pb<sup>2+</sup> leaking from PSCs for the first time. The Pb<sup>2+</sup>-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 Pb<sup>2+</sup> 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 Pb<sup>2+</sup> from PSCs can be realized. exposure time;detection limit;case study;assay;pH value;Glutathione Modified Gold Nanoparticles;13 nM;power conversion efficiency;Pb;PCE;content;detection results;drinking water;UV;Leaking Perovskite Solar Cells;GSH-AuNPs self-assembled;generation photovoltaics;Sensitive Colorimetric Detection;halide perovskite;rainwater samples;lab-based PSCs technology;Rainwater Polluted;optimized glutathione functionalized gold nanoparticles;ICP-MS;plasma mass spectrometry measurements;scale commercialization 2016-11-23
    https://acs.figshare.com/articles/journal_contribution/Glutathione_Modified_Gold_Nanoparticles_for_Sensitive_Colorimetric_Detection_of_Pb_sup_2_sup_Ions_in_Rainwater_Polluted_by_Leaking_Perovskite_Solar_Cells/4296197
10.1021/acs.analchem.6b03515.s001