A Coadditive Strategy for Blocking Ionic Mobility in Methylammonium?Free Perovskite Solar Cells and High?Stability Achievement
نویسندگان
چکیده
Herein, the synthesis of methylammonium-free and bromide-free CsxFA1?xPbI3 (FA for formamidinium) perovskite (PVK) photovoltaic layers with intrinsic outstanding properties in terms crystallinity, defect waiving/passivation, ionic mobility blocking by using a coadditives approach is described. It consists mixing two chloride additives PVK precursor solution: potassium (KCl) ammonium (NH4Cl). KCl favors lead iodide (PbI2) solubilization results purer phase. NH4Cl allows control crystallization growth speed, leading to formation large crystal grains well-crystallized layers. By glow-discharge optical emission spectroscopy (GD-OES) technique, it directly visualized that incorporated whole film blocks passivation. Also, reduction (or suppression) J–V curve hysteresis clearly correlated. found insufficient fully stabilize halide material which also requires monitoring carried out parallel second additive. resulted Cs0.1FA0.9PbI3 cells stabilized power conversion efficiency (PCE) 20.02% superior stability.
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ژورنال
عنوان ژورنال: Solar RRL
سال: 2021
ISSN: ['2367-198X']
DOI: https://doi.org/10.1002/solr.202100010