Citation: WANG Ya-Nan, MA Pin, PENG Lu-Mei, ZHANG Di, FANG Yan-Yan, ZHOU Xiao-Wen, LIN Yuan. Synthesis of Colloidal Perovskite CH₃NH₃PbBr₃_-_xCl_x Nanocrystals with Lead Acetate[J]. Acta Physico-Chimica Sinica, ;2017, 33(10): 2099-2105. doi: 10.3866/PKU.WHXB201705115 shu

Synthesis of Colloidal Perovskite CH₃NH₃PbBr₃_-_xCl_x Nanocrystals with Lead Acetate

WANG Ya-Nan ^1,2, ,
MA Pin ^1,2 ,
PENG Lu-Mei ¹ ,
ZHANG Di ^1,2 ,
FANG Yan-Yan ¹ ,
ZHOU Xiao-Wen ¹ ,
LIN Yuan ^1,2

1.
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
2.
University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 8 April 2017
Revised Date: 2 May 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (51303186, 51673204) and National Materials Genome Project, China (2016YFB0700600).

Lead acetate, which is highly soluble in dimethylformamide, was used to synthesize mixed halide perovskite CH₃NH₃PbBr₃_-_xCl_x (MA = CH₃NH₃, 0 ≤ x ≤ 3) nanocrystals (NCs). This method provides an approach to address the low solubility of lead halides, especially lead chloride. Different Br/Cl ratios in MAPbBr₃_-_xCl_x lead to various optical properties. The photoluminescence emission peak can be tuned from 399 to 527 nm. Their full-widths at half-maxima (FWHM) are about 20 nm. MAPbBr₃_-_xCl_xNCs have an average diameter of ~(11 ± 3) nm and have uniform dispersion in toluene. The MAPbBr₃ NCs have a long average recombination lifetime (τ_ave= 97.4 ns) and a photoluminescence quantum yield (PLQY) of up to 73%.
- Perovskite,
- CH₃NH₃PbBr₃_-_xCl_x,
- Nanocrystal,
- Lead acetate
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Synthesis of Colloidal Perovskite CH₃NH₃PbBr₃_-_xCl_x Nanocrystals with Lead Acetate