Active layer spin coating speed dependence of inverted organic solar cell based on Eosin-Y-coated ZnO nanorod arrays

R. T. Ginting, C. C. Yap, M. Yahaya, Vivi Fauzia, M. M. Salleh

Research output: Contribution to journalConference articlepeer-review

Abstract

The active layer spin coating speed dependence of the performance of inverted organic solar cells (OSCs) based on Eosin-Y-coated ZnOnanorods has been investigated. An active layer consisted of poly(2-methoxy-5-(2′-ethyl)- hexyloxy-p-phenylenevinylene) (MEH-PPV) as donor and phenyl-c61-butyric acid methyl ester (PCBM) as acceptor was employed, whereas ZnO nanorods were utilized as electron transporting layer. The active layer was deposited on top of Eosin-Y-coated ZnO nanorods with various spin coating speeds (1000-4000 rpm). Inverted OSCs with a structure of FTO/Eosin-Y-coated ZnO nanorods/MEH-PPV:PCBM /Ag were characterized through the current density-voltage (J-V) measurement under illumination intensity of 100 mW/cm2. Based on the investigation, the short circuit current density (Jsc) and the power conversion efficiency (PCE) enhanced significantly, where as fill factor slightly increased with spin coating speed. The two-diode equivalent model was found to fit the experimental J-V curves very well. The optimum PCE of 1.18 ± 0.07% was achieved at the highest spin coating speed of 4000 rpm, as a result of the decrement of diffusion current density (Jdiff), recombination current density (Jrec), and ideality factor, thus further confirms the strong built-in electric field in thinner photoactive layer.

Original languageEnglish
Article number012016
JournalJournal of Physics: Conference Series
Volume431
Issue number1
DOIs
Publication statusPublished - 1 Jan 2013
Event3rd ISESCO International Workshop and Conference on Nanotechnology 2012, IWCN 2012 - Selangor, Malaysia
Duration: 5 Dec 20127 Dec 2012

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