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August 14, 2026Journal of Electronic MaterialsOpen Access

Evaluation of the Potential of ITO/TiO2/P3MT Interfaces Prepared in Different Thicknesses for Application in Advanced Organic Devices

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Authors

LKLeandro Rodrigues KoenigUniversidade Estadual de LondrinaHSHenrique de SantanaUniversidade Estadual de Londrina

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Implication

Experimental study reveals thickness-dependent electrochemical behavior of ITO/TiO2/P3MT interfaces, indicating distinct suitability for supercapacitors versus photovoltaic cells.

Key Points

  • To evaluate the electrochemical and spectroscopic characteristics of electrochemically prepared ITO/TiO2/P3MT interfaces across different film thicknesses in comparison with ITO/P3MT systems.
  • Electrochemically synthesized poly(3-methylthiophene) (P3MT) films of varying thicknesses on bare indium tin oxide (ITO) and TiO2-coated ITO substrates.
  • Characterized interfacial properties and charge stabilization using cyclic voltammetry, electrochemical impedance spectroscopy (EIS), and confocal Raman spectroscopy.
  • In the ITO/P3MT system, specific capacitance decreased with increasing thickness from 65.89 F g−1 to 42.94 F g−1, whereas the ITO/TiO2/P3MT system exhibited lower capacitance that increased with thickness from 4.81 F g−1 to 8.60 F g−1.
  • Spectroscopic analysis demonstrated that thinner films favored radical cation stabilization in ITO/P3MT, while thicker films favored stabilization in ITO/TiO2/P3MT.
  • Enhanced interaction between TiO2 and thicker P3MT layers supported stable radical cation formation, matching performance criteria for active layers in inverted photovoltaic devices.

Cite This Study

Koenig et al. (2026) studied this question.

synapsesocial.com/papers/6a7ec764b70b84ec8b913bf6https://doi.org/10.1007/s11664-026-13098-0
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