Hole transport layer free bulk heterojunction organic solar cells with high work function ITO anodes

Wenhui Lu; Yiran peng; Qiyin Chen; Wei Tang; Tao Pang; Shuai Zhang; Zhixin liu; Lei Yan; Xingzhu Wang

doi:10.1063/1.5049424

AIP Advances (Sep 2018)

Hole transport layer free bulk heterojunction organic solar cells with high work function ITO anodes

Wenhui Lu,
Yiran peng,
Qiyin Chen,
Wei Tang,
Tao Pang,
Shuai Zhang,
Zhixin liu,
Lei Yan,
Xingzhu Wang

Affiliations

Wenhui Lu: Department of Applied Physics, College of Science, Huzhou University, Huzhou, Zhejiang 313000, P. R. China
Yiran peng: Department of Applied Physics, College of Science, Huzhou University, Huzhou, Zhejiang 313000, P. R. China
Qiyin Chen: Department of Applied Physics, College of Science, Huzhou University, Huzhou, Zhejiang 313000, P. R. China
Wei Tang: Colleges of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
Tao Pang: Department of Applied Physics, College of Science, Huzhou University, Huzhou, Zhejiang 313000, P. R. China
Shuai Zhang: Department of Applied Physics, College of Science, Huzhou University, Huzhou, Zhejiang 313000, P. R. China
Zhixin liu: Colleges of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
Lei Yan: Colleges of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
Xingzhu Wang: Colleges of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China

DOI: https://doi.org/10.1063/1.5049424
Journal volume & issue: Vol. 8, no. 9
pp. 095027 – 095027-6

Abstract

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In this work, hole transport layer (HTL) free bulk heterojunction organic solar cells (BHJ-OSCs) based on PTB7:PCBM as active layer have been fabricated by employing various ITO anodes with different work function. The power conversion efficiency of the BHJ-OSCs is significantly improved from 3.76 to 8.47% with increasing the work function of the ITO anode. By combining Mott–Schottky curves, external quantum efficiency and reflectance spectra of the BHJ-OSCs, we identify that the improved optoelectronic conversion due to the enhanced built-in electric field within the active layer which is induced by the high work function ITO anodes. The hole transport layer free device structure can be considered for the fabrication of cost-effective BHJ-OSCs due to their simple structure and high efficiency.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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