Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (10): 1129-1134.DOI: 10.15541/jim20160156

• Orginal Article • Previous Articles     Next Articles

Fabrication and Characterization of High Stability (EDA)(FA)2[Pb3I10] Layered Perovskite Film

GAO Yan-Min1, JIANG Wen-Long1, 2, YANG Tie-Ying2, ZUO Yin-Ze1   

  1. (1. The college of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China; 2. Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201204, China)
  • Received:2016-03-21 Revised:2016-04-13 Published:2016-10-20 Online:2016-09-23
  • Supported by:
    Scientific Research Foundation of Graduate School of Jiangsu University of Science and Technology(YCX11S-24);National Natural Science Foundation of China(U1332205)

Abstract:

A new two-dimensional layered hybrid perovskite solar-cell absorber was synthesized by one-step method, using (EDA)I2, (FA)I, and PbI2 with a 1:2:3 stoichiometric ratio in a solvent mixture of N, N-dimethylformamide(DMF). Ethylenediamine(EDA) cation was introduced into the perovskite lattice to synthesize a layered structure with improved resistance to the degradation by humidity in air. The effects of humidity and time on crystal structure, composition, morphology, and absorption spectra of (EDA)(FA)2[Pb3I10] and CH3NH3PbI3 were analyzed by in situ grazing incidence X-ray diffraction(GIXRD), X-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope(AFM), and UV-Vis spectroscope. The results reveal that the prepared (EDA)(FA)2[Pb3I10] film is more moisture resistant than the CH3NH3PbI3 film which is widely used in the perovskite solar cell. SEM analysis reveals that the (EDA)(FA)2[Pb3I10] film has a layered structure, which can reduce the degradation caused by moisture. What’s more, UV-Vis light absorption spectroscopy and atomic force microscopy(AFM) results show that the layered structure film is also a suitable absorber for perovskite solar cells. Photoluminescence spectrum(PL) reveals that bandgap of the (EDA)(FA)2[Pb3I10] film is 1.67 eV, which is close to the optimum value for solar photoelectric conversion. As compared to CH3NH3PbI3 film, the low-cost perovskite structure offers greater tunability on a molecular level for further material optimization and possibility for widely used in the future.

Key words: one-step method, perovskite, GIXRD, (EDA)(FA)2[Pb3I10]

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