Citation: WANG Yan-Qing, LI Long, NIE Lin-Hui, LI Nan-Nan, SHI Cheng-Wu. Organic-Inorganic Hybrid Perovskite Solar Cells Processed with Br or Cl Doping via a Two-Step Deposition[J]. Acta Physico-Chimica Sinica, ;2016, 32(11): 2724-2730. doi: 10.3866/PKU.WHXB201607272 shu

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

1.
Department of Chemical Engineering and Food Processing, Xuancheng Campus, Hefei University of Technology, Xuancheng 242000, Anhui Province, P. R. China;
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School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China

Received Date: 25 May 2016
Revised Date: 27 July 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (51472071, 51272016, 51072043) and Startup Foundation of Hefei University of Technology, China (JZ2014HGBZ0371, JZ2014HGBZ0358).

Mixed halide perovskites of MAPbI_3-xBr_x and MAPbI_3-xCl_x (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 MAPbI_3-xBr_x perovskite solar cells with 5% MABr in precursor solution showed a power conversion efficiency (PCE) of 13.2%, and the MAPbI_3-xCl_x perovskite solar cells with 15% MACl in precursor solution showed the highest PCE of 13.5%.
- Perovskite solar cell,
- PbI₂(DMSO) complex,
- Doping,
- Two-step deposition
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