Ternary blend polymer solar cells with wide-range light harvesting (Conference Presentation)

Hideo Ohkita; Ryosuke Shimizu; Yasunari Tamai

doi:10.1117/12.2272661

19 September 2017 Ternary blend polymer solar cells with wide-range light harvesting (Conference Presentation)

Hideo Ohkita, Ryosuke Shimizu, Yasunari Tamai

Proceedings Volume 10363, Organic, Hybrid, and Perovskite Photovoltaics XVIII; 103631L (2017) https://doi.org/10.1117/12.2272661
Event: SPIE Organic Photonics + Electronics, 2017, San Diego, California, United States

Abstract

Polymer-based solar cells have made rapid progress in the last decade and are currently attracting a great deal of attention as a next-generation solar cell. Very recently, they have shown a power conversion efficiency (PCE) of more than 10%, which is comparable to that reported for amorphous silicon solar cells. However, it is still required to improve the photovoltaic performance furthermore for practical applications. In this talk, I will demonstrate ternary blend polymer solar cells, which are a new approach to improving the photocurrent generation. We have recently developed ternary blend polymer solar cells based on a wide-bandgap polymer, poly(3-hexylthiophene) (P3HT), a fullerene derivative (PCBM), and a near-IR dye molecule such as a silicon phthalocyanine derivative (SiPc). Such near-IR dye addition can easily expand the light-harvesting wavelength range up to the near-IR region, and hence can boost the photocurrent furthermore. I will demonstrate how molecular design of near-IR dye molecules can control the location in ternary blend solar cells to improve the photocurrent generation effectively. We also have fabricated ternary blend polymer solar cells based on a wide-bandgap polymer, a low-bandgap polymer, and PCBM. This two-donor polymer blend can also expand the light-harvesting wavelength and hence can boost the photocurrent effectively. Efficient exciton harvesting and charge collection can be designed by combining a wide-bandgap crystalline polymer and a low-bandgap amorphous polymer.

Conference Presentation

Citation Download Citation

Hideo Ohkita, Ryosuke Shimizu, and Yasunari Tamai "Ternary blend polymer solar cells with wide-range light harvesting (Conference Presentation)", Proc. SPIE 10363, Organic, Hybrid, and Perovskite Photovoltaics XVIII, 103631L (19 September 2017); https://doi.org/10.1117/12.2272661

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KEYWORDS

Polymers

Solar cells

Molecules

Photovoltaics

Amorphous silicon

Crystals

Excitons

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