Organic solar cell performance and nano-morphology of poly(3-hexylthiophene-2,5-diyl) (P3HT)/PCBM thin film using poly(3-ocxylthiophene)

K. Sakai; K. Kojima; T. Mizutani; S. Ochiai

doi:10.1117/12.853956

18 May 2010 Organic solar cell performance and nano-morphology of poly(3-hexylthiophene-2,5-diyl) (P3HT)/PCBM thin film using poly(3-ocxylthiophene)

K. Sakai, K. Kojima, T. Mizutani, S. Ochiai

Author Affiliations +

Proceedings Volume 7722, Organic Photonics IV; 77221N (2010) https://doi.org/10.1117/12.853956
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

Organic solar cells have been attracting attention due to their economic and lightweight nature that facilitates processing. However, they also have low power conversion efficiency and short lifespans. Therefore, with practical organic solar cells in mind, solving these problems is important. To improve the power conversion efficiency of organic solar cells, the organic solar cell performance of poly(3-hexylthiophene-2,5-diyl)(P3HT)/PCBM thin film using poly(3-ocxylthiophene) was studied with the bulk heterojunction structure. It was shown that a red shift occurred by adding P3OT to the P3HT/PCBM mixture film at the absorption wavelength area of the active layer. This indicates that the formation of the P3HT grain and the aggregate of the PCBM molecule occur because of the P3OT addition. In the heat-treatment sample, it also emerges that the heat-treatment has an effect similar to the P3OT addition because it causes red shifts in both the P3HT/PCBM and P3OT/P3HT/PCBM thin films. This indicates that the formation of the P3HT grain and the aggregate of the PCBM molecule occur because of the P3OT addition. In the heat-treatment sample, the heat-treatment is understood to have an effect similar to the P3OT addition because it causes red shifts in both the P3HT/PCBM and P3OT/P3HT/PCBM thin film. Under preparatory conditions without thermal or solvent annealing, the power conversion efficiency, short circuit current, and open voltage and fill factor are 0.6%, Isc=3mA/cm², Voc=0.7V and 0.28, respectively.

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K. Sakai, K. Kojima, T. Mizutani, and S. Ochiai "Organic solar cell performance and nano-morphology of poly(3-hexylthiophene-2,5-diyl) (P3HT)/PCBM thin film using poly(3-ocxylthiophene)", Proc. SPIE 7722, Organic Photonics IV, 77221N (18 May 2010); https://doi.org/10.1117/12.853956

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KEYWORDS

Thin films

Thin film solar cells

Solar cells

Organic photovoltaics

Absorption

Atomic force microscopy

Annealing

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