物理化学学报 >> 2017, Vol. 33 >> Issue (10): 2099-2105.doi: 10.3866/PKU.WHXB201705115

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醋酸铅作为铅源合成CH3NH3PbBr3-xClx纳米晶体颗粒

王亚楠1,2,马品1,2,彭路梅1,张迪1,2,方艳艳1,周晓文1,林原1,2,*()   

  1. 1 中国科学院化学研究所,光化学重点实验室,北京分子科学国家实验室,中国科学院分子科学科教融合卓越中心,北京100190
    2 中国科学院大学,北京100049
  • 收稿日期:2017-04-03 发布日期:2017-07-17
  • 通讯作者: 林原 E-mail:linyuan@iccas.ac.cn
  • 基金资助:
    国家自然科学基金(51303186);国家自然科学基金(51673204);国家重点研发计划材料基因工程关键技术与支撑平台(2016YFB0700600)

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)

摘要:

采用醋酸铅作为铅源,成功制备出CH3NH3PbBr3-xClx (MA = CH3NH3,0 ≤ x ≤ 3)发光纳米晶体颗粒。醋酸铅比卤化物铅盐,尤其是氯化铅,能更好地溶解在N'N-二甲基甲酰胺(DMF)溶剂中,解决了卤化物盐溶解度低的问题。在MAPbBr3-xClx中,不同比例的Br/Cl可以产生不同的光谱性质,荧光光谱(PL)可以从399 nm调控到527 nm。所有荧光光谱的半峰宽(FWHM)在20 nm左右,说明色谱比较纯。制备的MAPbBr3-xClx纳米晶体颗粒尺寸分布在~(11 ± 3)nm,可以很好地分散在甲苯中。其中,MAPbBr3纳米晶体颗粒的荧光量子产率(PLQY)高达73%,其平均荧光寿命为97.4 ns。

关键词: 钙钛矿, CH3NH3PbBr3-xClx, 纳米晶体, 醋酸铅

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