Effect of Eosin-Y Coating Temperature on the Performance of Inverted Bulk Heterojunction Organic Solar Cells

Abstract:

Inverted type bulk heterojunction organic solar cell based on ZnO nanorod arrays have been used to overcome the degradation problem of conjugated polymer and low work function electrode. ZnO nanorods and Eosin-Y are widely used to increase the charge mobility and light absorbance, respectively. The effects of Eosin-Y coating temperature (30 – 50 oC) on the performance of 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 (PC61BM) as acceptor with a structure of fluorine-doped tin oxide (FTO)/Eosin-Y coated ZnO nanorod arrays/MEHPPV:PCBM/Ag were investigated. By using FTO as a substrate, sol-gel and spin coating method was used to deposit ZnO seed layer on FTO surface. The ZnO nanorods were then grown on the ZnO seed layer by chemical bath deposition method and coated with dye by immersing the substrates into Eosin-Y solution at different temperatures. The result shows that absorption of Eosin-Y coated ZnO nanorods increased with dye coating temperature. The optimum power conversion efficiency of η = 1.24 × 10-2 % was achieved at dye coating temperature 50 oC under 100 mW/cm2 simulated AM 1.5 G sunlight.

• Periodical: Advanced Materials Research (Volume 501)
• Pages: 199-203
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.501.199
• Online since: April 2012
• Authors: Riski Titian Ginting, Chi Chin Yap, Muhammad Yahaya, Muhamad Mat Salleh
• Keywords: Bulk Heterojunction, Eosin-Y, ZnO Nanorod

References

[1] K. Takanezawa, K. Tajima, and K. Hashimoto, Efficiency enhancement of polymer photovoltaic devices hybridized with ZnO nanorod arrays by the introduction of a vanadium oxide buffer layer, Applied Physics Letters. 93 (2008) 063308-1 – 063308-3.

DOI: 10.1063/1.2972113

[2] M. P. Jong, L. J. van IJzendoorn, and M. J. A. Voigt, Stability of the interface between indium-tin-oxide and poly(3,4 ethylenedioxythiophene)/ poly(stryrenesulfonate) in polymer light-emitting diodes, Applied Physics Letters. 77 (2000) 2255 – 2257.

DOI: 10.1063/1.1315344

[3] M. Jørgensen, K. Norrman, F. C. Krebs, Stability/degradation of polymer solar cells, Solar Energy Materials and Solar Cells. 92 (2008) 686-714.

DOI: 10.1016/j.solmat.2008.01.005

[4] Y. Yan, S. Zhao, Z. Xu, G. Wei and L. Wang, The effect of modified layers on the performance of inverted ZnO nanorods/MEH-PPV solar cells, Science China Physics, Mechanics & Astronomy, 54 (2011) 453 – 458.

DOI: 10.1007/s11433-010-4230-8

[5] P. Suri, M. Panwar, and R.M. Mehra, Photovoltaic performance of dye-sensitized ZnO solar cell based on Eosin-Y photosensitizer, Material Science-Poland. 25 (2007) 137 – 144.

[6] P. Ruankham, C. S. Kung, N. Mangkorntong, P. Mangkorntong, and S. Choopun, Photoelectrochemical Characteristic of ZnO Dye-sensitized Solar Cell with Platinum Nanoparticle as a Counterelectrode, Journal of Natural Science. 7 (2008) 177-184.

[7] J.S. Huang, C.F. Lin, Controlled Growth of Zinc Oxide Nanorod Array in Aqueous Solution by Zinc Oxide Sol-gel Thin Film in Relation to Growth Rate and Optical Property, Nanotechnology (2008) 135 – 138.

DOI: 10.1109/nano.2008.47

[8] S. Baruah, and J. Dutta, Effect of seeded substrates on hydrothermally grown ZnO nanorods, Journal of Sol-Gel Science and Technology. 50 (2009) 456-464.

DOI: 10.1007/s10971-009-1917-2