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Polyvinyl pyrrolidone (PVP) is doped to PbI2 and organic salt during two‐step growth of halideperovskite. It is observed that PVP molecules can interact with both PbI2 and organic salt, reduce the aggregation and crystallization of the two, and then slow down the coarsening rate of perovskite. As doping concentration increases from 0 to 1 mM in organic salt, average crystallite size of perovskite...
Ba0.8Sr0.2TiO3 thin films with different concentrations of Co dopant (0–10 mol%) were deposited on Pt/Ti/SiO2/Si substrates by sol-gel method. The microstructure, surface morphology, dielectric and tunable properties of the films were investigated as a function of Co concentration. It was demonstrated that all the Co doped Ba0.8Sr0.2TiO3 (BSTC) thin films exhibited dense microstructure with uniform...
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