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Open AccessArticle

Transient Photocurrent Response of Plasmon-Enhanced Polymer Solar Cells with Gold Nanoparticles

by Yi Fang 1,2, Yanbing Hou 1,*, Yufeng Hu 1 and Feng Teng 1
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
School of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China
Author to whom correspondence should be addressed.
Academic Editor: Gururaj V. Naik
Materials 2015, 8(7), 4050-4060;
Received: 25 May 2015 / Revised: 16 June 2015 / Accepted: 26 June 2015 / Published: 6 July 2015
(This article belongs to the Special Issue Plasmonic Materials)
In this work, the transient photocurrent of the plasmon-enhanced polymer bulk heterojunction solar cells based on poly(3-hexylthiophene) (P3HT) and [6,6]-Phenyl C61 butyric acid methyl ester (PCBM) is investigated. Two kinds of localized surface plasmon resonance (LSPR) enhanced devices were fabricated by doping the gold nanoparticles (Au NPs) into the anode buffer layer and inserting Au NPs between the anode buffer layer and the active layer. We probed the dynamics of the turn-on and turn-off responses to 400 μs square-pulse optical excitation from the 380 nm and 520 nm light-emitting diodes (LED) driven by an electric pulse generator. The transient photocurrent curves of devices with Au NPs at different positions and under different excitation wavelength are compared and analyzed. The charge trapping/detrapping processes that occurred at the interface of Au NPs and the active layer were observed; these exhibit an overshoot in the initial fast rise of photocurrent response. Our results show that the incorporating position of Au NPs is an important key factor to influence the transient photocurrent behaviors. View Full-Text
Keywords: polymer solar cells; gold nanoparticles; plasmon; transient photocurrent polymer solar cells; gold nanoparticles; plasmon; transient photocurrent
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Fang, Y.; Hou, Y.; Hu, Y.; Teng, F. Transient Photocurrent Response of Plasmon-Enhanced Polymer Solar Cells with Gold Nanoparticles. Materials 2015, 8, 4050-4060.

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