Insights of close contact between polyaniline and FTO substrate for enhanced photovoltaic performances of dye-sensitized solar cells

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• 作者：Peipei Xu ; Qunwei Tang ; ^{tangqunwei@hotmail.com" class="auth_mail} ; Haiyan Chen ; Benlin He
• 关键词：Dye-sensitized solar cell ; Polyaniline ; Interfacial contact ; Charge transfer ; Conducting polymer
• 刊名：Electrochimica Acta
• 出版年：10 April, 2014
• 年：2014
• 卷：125
• 期：Complete
• 页码：163-169
• 全文大小：1087 K

文摘

Aiming for enhancing photovoltaic performances of DSSCs from polyaniline (PANi) counter electrodes (CEs), here we report the chemical deposition of dense PANi nanoparticle CEs. The dense nanoparticles enhance the interfacial contact between PANi layer and fluorine doped tin oxide (FTO) conducting substrate. Comprehensive performances of H₂SO₄ doped PANi CE are better than that of HCl or H₃PO₄ doped PANi. Resultant PANi CEs are thoroughly characterized by scanning electron microscopy observation, X-ray diffraction patterns, electrochemical techniques, and spectral analysis such as UV-vis spectra, Fourier transform infrared spectra, Raman and NMR spectra. Owing to the long conjugation structure, high doping level and degree of electron delocalization, H₂SO₄ doped PANi CE displays good electrical conduction and electrocatalytical behaviors toward I^{鈭?/sup>/I₃鈭?/sup> redox species. A light-to-electric power conversion efficiency of 7.30% under 100 mW cm鈭? (AM1.5) has been determined from H₂SO₄ doped PANi-based DSSCs.}