物理化学学报 >> 2016, Vol. 32 >> Issue (11): 2724-2730.doi: 10.3866/PKU.WHXB201607272

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两步沉积法制备Br或Cl掺杂的有机-无机杂化钙钛矿太阳电池

王艳青1,*(),李龙1,聂林辉1,李楠楠2,史成武1,2   

  1. 1 合肥工业大学宣城校区化工与食品加工系,安徽宣城242000
    2 合肥工业大学化学与化工学院,合肥230009
  • 收稿日期:2016-05-25 发布日期:2016-11-08
  • 通讯作者: 王艳青 E-mail:yqwang@hfut.edu.cn
  • 基金资助:
    国家自然科学基金(51472071);国家自然科学基金(51272016);国家自然科学基金(51072043);校博士启动基金(JZ2014HGBZ0371);校博士启动基金(JZ2014HGBZ0358)

Organic-Inorganic Hybrid Perovskite Solar Cells Processed with Br or Cl Doping via a Two-Step Deposition

Yan-Qing WANG1,*(),Long LI1,Lin-Hui NIE1,Nan-Nan LI2,Cheng-Wu SHI1,2   

  1. 1 Department of Chemical Engineering and Food Processing, Xuancheng Campus, Hefei University of Technology, Xuancheng 242000, Anhui Province, P. R. China
    2 School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
  • Received:2016-05-25 Published:2016-11-08
  • Contact: Yan-Qing WANG E-mail:yqwang@hfut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51472071);the National Natural Science Foundation of China(51272016);the National Natural Science Foundation of China(51072043);Startup Foundation of Hefei University of Technology, China(JZ2014HGBZ0371);Startup Foundation of Hefei University of Technology, China(JZ2014HGBZ0358)

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摘要：

采用控制前驱体浓度的两步沉积法和插入PbI2层的DMSO分子（PbI2（DMSO）复合体）分别与MAX（MA=CH3NH3，X=I，Br）或MAX（X=I，Cl）进行的分子内交换法，实现了Br或Cl的掺杂并合成了厚度为300nm左右的混合卤化物钙钛矿MAPbI3-xBrx和MAPbI3-xClx膜。MAX前驱体溶液中含5%（摩尔分数，下同）MABr或15% MACl所生成的Br或Cl掺杂钙钛矿膜能提高钙钛矿太阳电池的光伏性能，进一步提高MABr或MACl的含量并不会明显改变掺杂量，但会形成小的白色颗粒或者针孔，这些将对电池的性能产生不利影响。前驱体溶液含5% MABr的MAPbI3-xBrx钙钛矿太阳电池所获得的能量转换效率（PCE）为13.2%，含15% MACl的MAPbI3-xClx钙钛矿太阳电池获得了最高13.5%的PCE。

关键词: 钙钛矿太阳电池, PbI2(DMSO)复合体, 掺杂, 两步沉积

Abstract:

Mixed halide perovskites of MAPbI3-xBrx and MAPbI3-xClx (MA=CH3NH3) with film thickness of about 300 nm were synthesized through the Br or Cl doping, thanks to the two steps deposition of controlled concentration of the precursor solution and the intramolecular exchange of DMSO molecules intercalated in PbI2 (PbI2(DMSO) complex) with MAX (X=I, Br) or MAX (X=I, Cl), respectively. The doping of Br or Cl in the perovskite film can improve the photovoltaic performance of PSCs with the precursor of MAX contains 5% (in mole fraction, same below) MABr or 15% MACl, respectively, while further increase in the content of MABr or MACl in the precursor did not lead to significant changes in doping amounts, but small white particles or pin-holes were formed in mixed perovskite materials, therefore resulted in adverse effects on the performance of solar cells. The MAPbI3-xBrx perovskite solar cells with 5% MABr in precursor solution showed a power conversion efficiency (PCE) of 13.2%, and the MAPbI3-xClx perovskite solar cells with 15% MACl in precursor solution showed the highest PCE of 13.5%.

Key words: Perovskite solar cell, PbI2(DMSO) complex, Doping, Two-step deposition