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Perovskite decomposition and missing crystal planes in HRTEM
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Journal Article
Perovskite decomposition and missing crystal planes in HRTEM
2021
Overview
Clearly, (1Ē2), (112) planes exist in the electron diffraction pattern. [...]П2), (112) planes are also present in HRTEM images under low electron dose2, selected-area electron diffraction (SAED)3,4 and X-ray diffraction (XRD)5-7 characterizations. Owing to lack of the corresponding in situ high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) image in the original paper, it is impossible to prove that the higher-contrast spots are PbS quantum dots rather than PbI2 particles. If possible, it would also be better if they compared the particle size and size distribution of colloidal quantum dots and quantum dots in perovskite in the original paper. [...]a low dose10-15 and low temperature2,13 can reduce the damage of electron-beam irradiation to perovskite, and may help to obtain the real structure of the quantum dots in perovskite solids.
Publisher
Nature Publishing Group UK,Nature Publishing Group
