Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO2 nanotubes

doi:10.1088/1674-1056/25/4/047201

中国物理B ›› 2016, Vol. 25 ›› Issue (4): 47201-047201.doi: 10.1088/1674-1056/25/4/047201

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

Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO₂ nanotubes

Mehdi Ahmadi, Sajjad Rashidi Dafeh, Hamed Fatehy

Department of Physics, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran

收稿日期:2015-08-11 修回日期:2015-12-14 出版日期:2016-04-05 发布日期:2016-04-05
通讯作者: Mehdi Ahmadi E-mail:m.ahmadi@vru.ac.ir

Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO₂ nanotubes

Mehdi Ahmadi, Sajjad Rashidi Dafeh, Hamed Fatehy

Department of Physics, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran

Received:2015-08-11 Revised:2015-12-14 Online:2016-04-05 Published:2016-04-05
Contact: Mehdi Ahmadi E-mail:m.ahmadi@vru.ac.ir

摘要/Abstract

摘要： An inverted structure of polymer solar cells based on Poly(3-hexylthiophene)(P3HT):[6-6] Phenyl-(6) butyric acid methyl ester (PCBM) with using thin films of TiO₂ nanotubes and nanoparticles as an efficient cathode buffer layer is developed. A total of three cells employing TiO₂ thin films with different thickness values are fabricated. Two cells use layers of TiO₂ nanotubes prepared via self-organized electrochemical-anodizing leading to thickness values of 203 and 423.7 nm, while the other cell uses only a simple sol-gel synthesized TiO₂ thin film of nanoparticles with a thickness of 100 nm as electron transport layer. Experimental results demonstrate that TiO₂ nanotubes with these thickness values are inefficient as the power conversion efficiency of the cell using 100-nm TiO₂ thin film is 1.55%, which is more than the best power conversion efficiency of other cells. This can be a result of the weakness of the electrochemical anodizing method to grow nanotubes with lower thickness values. In fact as the TiO₂ nanotubes grow in length the series resistance (R_s) between the active polymer layer and electron transport layer increases, meanwhile the fill factor of cells falls dramatically which finally downgrades the power conversion efficiency of the cells as the fill factor falls.

关键词: inverted polymer solar cells, TiO₂ nanotubes, electrochemical-anodizing, doctor blading

Abstract: An inverted structure of polymer solar cells based on Poly(3-hexylthiophene)(P3HT):[6-6] Phenyl-(6) butyric acid methyl ester (PCBM) with using thin films of TiO₂ nanotubes and nanoparticles as an efficient cathode buffer layer is developed. A total of three cells employing TiO₂ thin films with different thickness values are fabricated. Two cells use layers of TiO₂ nanotubes prepared via self-organized electrochemical-anodizing leading to thickness values of 203 and 423.7 nm, while the other cell uses only a simple sol-gel synthesized TiO₂ thin film of nanoparticles with a thickness of 100 nm as electron transport layer. Experimental results demonstrate that TiO₂ nanotubes with these thickness values are inefficient as the power conversion efficiency of the cell using 100-nm TiO₂ thin film is 1.55%, which is more than the best power conversion efficiency of other cells. This can be a result of the weakness of the electrochemical anodizing method to grow nanotubes with lower thickness values. In fact as the TiO₂ nanotubes grow in length the series resistance (R_s) between the active polymer layer and electron transport layer increases, meanwhile the fill factor of cells falls dramatically which finally downgrades the power conversion efficiency of the cells as the fill factor falls.

Key words: inverted polymer solar cells, TiO₂ nanotubes, electrochemical-anodizing, doctor blading

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, Hamed Fatehy. Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO₂ nanotubes[J]. 中国物理B, 2016, 25(4): 47201-047201.

Mehdi Ahmadi, Sajjad Rashidi Dafeh, Hamed Fatehy. Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO₂ nanotubes[J]. Chin. Phys. B, 2016, 25(4): 47201-047201.

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Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO₂ nanotubes

Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO₂ nanotubes

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