Fabrication and performance of organic thin film solar cells using a painting method

S. Ochiai; H. Ishihara; T. Mizutani; K. Kojima

doi:10.1117/12.853955

18 May 2010 Fabrication and performance of organic thin film solar cells using a painting method

S. Ochiai, H. Ishihara, T. Mizutani, K. Kojima

Proceedings Volume 7722, Organic Photonics IV; 77221M (2010) https://doi.org/10.1117/12.853955
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

As organic thin film solar cells fabricated by the active layer of organic materials are economical, lightweight, and flexible, as well as generating no CO₂, and being easy to fabricate, they have attracted significant attention as green energy sources from a past decade to date. Therefore, their power conversion efficiency (PCE) has been investigated and studied worldwide. In organic thinfilm solar cells, the effect of the performance depends not only on the adopted active material but also relates to the molecular orientation on the electrode. Using a mixed solution of Poly(3-hexylthiophene) and PCBM, both of which were dissolved in a solvent, the organic thin films were fabricated using the paint and spray methods, while the morphology of the thin film was evaluated by an AFM image, UV/vis spectra, and so forth. Based on these data, an organic thin-film solar cell using both solution methods for the active layer was fabricated, and the performance evaluated and examined. For organic thin film solar cells fabricated using a spin-coating method, the open-circuit voltage (Voc) is 0.41V, the short circuit current density (Jsc) is 2.07mA/cm², and the fill factor is 0.34, while the efficiency η of PCE become 0.29%. In the spray method, the short circuit current (Isc) is 2.5 mA/cm², the open circuit voltage (Voc) is 0.45 V, the fill factor (FF) is 0.28, and the power conversion factor (PCE) 0.35%. The area of organic solar cells fabricated by spin coating and spray methods is 1 cm² respectively. The organic solar cells are not thermally treated, and hence have high respective power conversion efficiencies.

Citation Download Citation

S. Ochiai, H. Ishihara, T. Mizutani, and K. Kojima "Fabrication and performance of organic thin film solar cells using a painting method", Proc. SPIE 7722, Organic Photonics IV, 77221M (18 May 2010); https://doi.org/10.1117/12.853955

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