中国物理B ›› 2017, Vol. 26 ›› Issue (9): 97203-097203.doi: 10.1088/1674-1056/26/9/097203

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Inverted organic solar cells with solvothermal synthesized vanadium-doped TiO2 thin films as efficient electron transport layer

Mehdi Ahmadi, Sajjad Rashidi Dafeh, Samaneh Ghazanfarpour, Mohammad Khanzadeh   

  1. Department of Physics, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
  • 收稿日期:2017-03-12 修回日期:2017-05-13 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: Mehdi Ahmadi E-mail:m.ahmadi@vru.ac.ir

Inverted organic solar cells with solvothermal synthesized vanadium-doped TiO2 thin films as efficient electron transport layer

Mehdi Ahmadi, Sajjad Rashidi Dafeh, Samaneh Ghazanfarpour, Mohammad Khanzadeh   

  1. Department of Physics, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
  • Received:2017-03-12 Revised:2017-05-13 Online:2017-09-05 Published:2017-09-05
  • Contact: Mehdi Ahmadi E-mail:m.ahmadi@vru.ac.ir

摘要: We investigated the effects of using different thicknesses of pure and vanadium-doped thin films of TiO2 as the electron transport layer in the inverted configuration of organic photovoltaic cells based on poly (3-hexylthiophene) P3HT: [6-6] phenyl-(6) butyric acid methyl ester (PCBM). 1% vanadium-doped TiO2 nanoparticles were synthesized via the solvothermal method. Crystalline structure, morphology, and optical properties of pure and vanadium-doped TiO2 thin films were studied by different techniques such as x-ray diffraction, scanning electron microscopy, transmittance electron microscopy, and UV-visible transmission spectrum. The doctor blade method which is compatible with roll-2-roll printing was used for deposition of pure and vanadium-doped TiO2 thin films with thicknesses of 30 nm and 60 nm. The final results revealed that the best thickness of TiO2 thin films for our fabricated cells was 30 nm. The cell with vanadium-doped TiO2 thin film showed slightly higher power conversion efficiency and great Jsc of 10.7 mA/cm2 compared with its pure counterpart. In the cells using 60 nm pure and vanadium-doped TiO2 layers, the cell using the doped layer showed much higher efficiency. It is remarkable that the external quantum efficiency of vanadium-doped TiO2 thin film was better in all wavelengths.

关键词: inverted polymer solar cells, electron transport layer, vanadium-doped TiO2 thin films, solvothermal

Abstract: We investigated the effects of using different thicknesses of pure and vanadium-doped thin films of TiO2 as the electron transport layer in the inverted configuration of organic photovoltaic cells based on poly (3-hexylthiophene) P3HT: [6-6] phenyl-(6) butyric acid methyl ester (PCBM). 1% vanadium-doped TiO2 nanoparticles were synthesized via the solvothermal method. Crystalline structure, morphology, and optical properties of pure and vanadium-doped TiO2 thin films were studied by different techniques such as x-ray diffraction, scanning electron microscopy, transmittance electron microscopy, and UV-visible transmission spectrum. The doctor blade method which is compatible with roll-2-roll printing was used for deposition of pure and vanadium-doped TiO2 thin films with thicknesses of 30 nm and 60 nm. The final results revealed that the best thickness of TiO2 thin films for our fabricated cells was 30 nm. The cell with vanadium-doped TiO2 thin film showed slightly higher power conversion efficiency and great Jsc of 10.7 mA/cm2 compared with its pure counterpart. In the cells using 60 nm pure and vanadium-doped TiO2 layers, the cell using the doped layer showed much higher efficiency. It is remarkable that the external quantum efficiency of vanadium-doped TiO2 thin film was better in all wavelengths.

Key words: inverted polymer solar cells, electron transport layer, vanadium-doped TiO2 thin films, solvothermal

中图分类号:  (Polymers; organic compounds (including organic semiconductors))

  • 72.80.Le
73.61.-r (Electrical properties of specific thin films) 73.22.-f (Electronic structure of nanoscale materials and related systems)