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A Facile and Green Approach to Synthesize Mesoporous Anatase TiO2 Nanomaterials for Efficient Dye-Sensitized and Hole-Conductor-Free Perovskite Solar Cells

  • Liang Chu
    Liang Chu
    New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    More by Liang Chu
  • Jie Zhang
    Jie Zhang
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    More by Jie Zhang
  • Wei Liu
    Wei Liu
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    More by Wei Liu
  • Rui Zhang
    Rui Zhang
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    More by Rui Zhang
  • Jian Yang
    Jian Yang
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    More by Jian Yang
  • Ruiyuan Hu
    Ruiyuan Hu
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    More by Ruiyuan Hu
  • Xing’ao Li*
    Xing’ao Li
    New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    *E-mail: [email protected]
    More by Xing’ao Li
  • , and 
  • Wei Huang*
    Wei Huang
    Key Laboratory for Organic Electronics & Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications (NUPT), 9 Weiyuan Road, Nanjing 210046, P. R. China
    Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, P. R. China
    *E-mail: [email protected]
    More by Wei Huang
Cite this: ACS Sustainable Chem. Eng. 2018, 6, 4, 5588–5597
Publication Date (Web):March 5, 2018
https://doi.org/10.1021/acssuschemeng.8b00607
Copyright © 2018 American Chemical Society
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Supporting Info (1)»

Abstract

Mesoporous anatase TiO2 nanomaterials (MATNs) with both large specific surface areas and structural coherence are highly desirable to achieve excellent physicochemical properties for photovoltaic applications, but the existing synthesis methods either need templates or cause pollution. Herein we report a simple, template-free, and green approach to synthesize MATNs consisting of interconnected nanoparticles. The Ti-complex intermediates were first prepared using titanium isopropoxide and acetic acid in a solvothermal reaction, which went through a morphology transformation sequence of nanowires, microspheres, and microflowers with a prolonged reaction time. Then the Ti-complex intermediates were cracked into MATNs under annealing, which were applied in dye-sensitized solar cells (DSSCs) and hole-conductor-free perovskite solar cells (HPSCs). The mesoporous anatase TiO2 nanowire-based DSSCs achieved a high power conversion efficiency (PCE) up to 7.78% because of both a high dye-adsorption capacity and long charge-transfer channels, while the PCE based on the P25 photoelectrodes is 6.61%. The further application of mesoporous anatase TiO2 nanowires in HPSCs achieved an improved PCE of 8.52%, compared to 6.78% for cells prepared using the P25 electrodes.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acssuschemeng.8b00607.

  • Part of enlarged XRD patterns of the TiO2 products, nitrogen adsorption isotherms and pore-size curves of the P25 nanoparticle powder, equivalent circuit models of Nyquist plots of DSSCs and carbon-based HPSCs, simulated values of the equivalent circuit model of Nyquist plots of DSSCs, and photovoltaic parameters of different HPSCs based on P25 nanoparticles and mesoporous TiO2 nanowires (PDF)

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