Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (5): 1207-1213.doi: 10.3866/PKU.WHXB201602241

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Influence of Insulating Oxide Coatings on the Performance of Perovskite Solar Cells and the Interface Charge Recombination Dynamics

Li ZHOU1,Jun ZHU2,*(),Ya-Feng XU2,Zhi-Peng SHAO2,Xu-Hui ZHANG2,Jia-Jiu YE2,Yang HUANG2,Chang-Neng ZHANG2,Song-Yuan DAI2,3,*   

  1. 1 School of Physics and Materials Science, Anhui University, Hefei 230601, P. R. China
    2 Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei 230031, P. R. China
    3 Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing 102206, P. R. China
  • Received:2015-12-11 Published:2016-05-07
  • Contact: Jun ZHU,Song-Yuan DAI
  • Supported by:
    the National High Technology Research and Development Program of China (863)(2015AA050602);National Natural Science Foundation of China(21403247)


Insulating oxides of SiO2, ZrO2, and Al2O3 were coated using a dipping method on the surface of mesoporous TiO2 nanoparticles for perovskite solar cells. The effects of the insulating oxide coatings on the performance of the perovskite solar cells and the interface charge recombination dynamics were investigated in detail. The efficiency of devices after SiO2 coating improved by 13.7% due to their FF (fill factor) increasing from 67.6% to 72.3%. However, the devices with ZrO2 and Al2O3 coatings exhibited an increase in Voc of up to 50 mV and a decrease in Jsc and FF. Transient absorption spectroscopy on a timescale from nanoseconds to milliseconds was performed to study the interface recombination lifetime between electrons and holes and the changes of the device performances are discussed.

Key words: Perovskite solar cell, Recombination lifetime, Transient absorption, Surface coating, Metal oxide


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