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

doi:10.1088/1674-1056/26/9/097203

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

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

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/Abstract

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 J_sc 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 J_sc 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)

Mehdi Ahmadi,Sajjad Rashidi Dafeh,Samaneh Ghazanfarpour,Mohammad Khanzadeh. Inverted organic solar cells with solvothermal synthesized vanadium-doped TiO₂ thin films as efficient electron transport layer[J]. 中国物理B, 2017, 26(9): 97203-097203.

Mehdi Ahmadi, Sajjad Rashidi Dafeh, Samaneh Ghazanfarpour, Mohammad Khanzadeh. Inverted organic solar cells with solvothermal synthesized vanadium-doped TiO₂ thin films as efficient electron transport layer[J]. Chin. Phys. B, 2017, 26(9): 97203-097203.

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

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

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