Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (10): 2099-2105.doi: 10.3866/PKU.WHXB201705115

• ARTICLE • Previous Articles     Next Articles

Synthesis of Colloidal Perovskite CH3NH3PbBr3-xClx Nanocrystals with Lead Acetate

Ya-Nan WANG1,2,Pin MA1,2,Lu-Mei PENG1,Di ZHANG1,2,Yan-Yan FANG1,Xiao-Wen ZHOU1,Yuan LIN1,2,*()   

  1. 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:2017-04-03 Published:2017-07-17
  • Contact: Yuan LIN E-mail:linyuan@iccas.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(51303186);the National Natural Science Foundation of China(51673204);National Materials Genome Project, China(2016YFB0700600)

Abstract:

Lead acetate, which is highly soluble in dimethylformamide, was used to synthesize mixed halide perovskite CH3NH3PbBr3-xClx (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-xClx 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-xClx NCs have an average diameter of ~(11 ± 3) nm and have uniform dispersion in toluene. The MAPbBr3 NCs have a long average recombination lifetime (τave = 97.4 ns) and a photoluminescence quantum yield (PLQY) of up to 73%.

Key words: Perovskite, CH3NH3PbBr3-xClx, Nanocrystal, Lead acetate

MSC2000: 

  • O646