期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 10, 期 24, 页码 7916-7921出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b03306
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类别
资金
- DST-SERB [EMR/2016/001703, EMR/2016/001795]
- CSIR
Red emitting alpha-CsPbI3 nanocrystals are highly phase sensitive to ambient exposure, and B-site doping with suitable cations is adopted as one of the most feasible approaches for their phase stability. There are several reports herein: Ni(II) ions having the smallest transition metal Shannon radii were explored for doping in these nanocrystals. This successfully stabilized the cubic phase and retained the intense emission of nanocrystals for nearly 2 months. Being the smallest ion, the halide octahedra in the perovskite lattice were expected to provide high restraint ability toward delta-CsPbI3. Comparing with postsynthesis iodide treatments, the importance of doping in high temperature reaction was discussed. Finally, these doped nanocrystals were explored for photovoltaic devices and showed comparable efficiency (9.1%) to different other similar doped nanocrystals. Hence, the finding reported here is a step forward for understanding the insights of phase stability of alpha-CsPbI3 perovskite nanocrystals.
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