ZnO Nanorod Arrays Coated with Eosin-Y at Different Concentrations for Inverted Bulk Heterojunction Organic Solar Cells

Abstract:

Inverted bulk heterojunction organic solar cells based on vertically aligned dye-coated ZnO nanorods arrays were fabricated. The dye, Eosin-Y was wrapped on ZnO nanorods arrays with dye coating concentration ranging from 0.05 mM to 0.3 mM at room temperature for 1 h. The effects of Eosin-Y solution concentration on the performance of inverted bulk heterojunction organic solar cells based on a blend of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEHPPV) as donor and (6,6)-phenyl-C61 butyric acid methyl ester (PCBM) as acceptor with a structure of fluorine-doped tin oxide (FTO)/Eosin-Y coated ZnO nanorod arrays/MEHPPV:PCBM/Ag were investigated. Length, diameter and morphology of ZnO nanorods arrays were characterized. The optical properties of the Eosin-Y coated ZnO nanorod arrays were investigated and the organic solar cells were characterized by current–voltage measurements under 100 mW/cm2 simulated AM 1.5 G sunlight. It was found that current density, Jsc increased from 0.00134 mA/ cm2 to 0.0162 mA/ cm2 with increase in concentration of Eosin-Y from 0.05 mM to 0.3 mM. Solar cell with 0.3 mM Eosin-Y gave the highest power conversion efficiency, which is 7.15×10-4 %. Short circuit current density was 0.0162 mA/ cm2 and the corresponding open circuit voltage was 0.17 V.

• Periodical: Advanced Materials Research (Volume 501)
• Pages: 214-218
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.501.214
• Online since: April 2012
• Authors: Eng Liang Lim, Chi Chin Yap, Muhammad Yahaya, Muhamad Mat Salleh
• Keywords: Ag, Eosin-Y, FTO, Inverted Bulk Heterojunction Organic Solar Cells, ZnO Nanorod

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