期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 27, 页码 30711-30719出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c07655
关键词
CsPbCl(3)nanocrystals; Mn2+; co-doping crystal field; color tuning
资金
- National Natural Science Foundation of China [61704007]
- Fundamental Research Funds for the Central Universities [2017RC015]
CsPbCl3:Mn2+ is a practical solution for obtaining red-orange light inorganic perovskite nanocrystals since CsPbCl3 is unstable. Increasing the concentration of Mn2+ is an effective way to enhance the orange-red emission of CsPbCl3:Mn2+. However, the relationship between emission intensity of the Mn2+ dopant and the concentration of Mn2+ is very chaotic in different studies. As a transition metal ion, the electronic states of Mn2+ are very sensitive to the crystal field environment. Here, the crystal field of the CsPbCl3:Mn2+ nanocrystals was adjusted by co-doping other cations, and the concentration of Mn2+ remained unchanged. Additionally, the crystal field strength of different samples was calculated. Compared with the CsPbCl3:Mn2+ nanocrystals, the red-orange peak in the fluorescence spectrum of CsPbCl3 :Mn2+, Er3+ nanocrystals was redshifted from 580 to 600 nm and enhanced by 100 times successfully. The same experiment was carried out on CsPbCl3:Mn2+ nanoplatelets at the same time to confirm the changed crystal field around Mn2+. The effect of co-doping cations on the luminescence properties of Mn2+ is similar to that in nanocubes, and the mechanism was analyzed in detail.
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