Absorption and quasiguided mode analysis of organic solar cells with photonic crystal photoactive layers | Zendy

John R. Tumbleston | Zendy; Doo-Hyun Ko | Zendy; Edward T. Samulski | Zendy; René López | Zendy

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Absorption and quasiguided mode analysis of organic solar cells with photonic crystal photoactive layers

Author(s) -

John R. Tumbleston,

Doo-Hyun Ko,

Edward T. Samulski,

René López

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.007670

Subject(s) - materials science , photoactive layer , photonic crystal , optoelectronics , absorption (acoustics) , refractive index , optics , heterojunction , absorption edge , organic solar cell , polymer solar cell , solar cell , band gap , polymer , physics , composite material

We analyze optical absorption enhancements and quasiguided mode properties of organic solar cells with highly ordered nanostructured photoactive layers comprised of the bulk heterojunction blend, poly-3-hexylthiophene/[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) and a low index of refraction conducting material (LICM). This photonic crystal geometry is capable of enhancing spectral absorption by approximately 17% in part due to the excitation of quasiguided modes near the band edge of P3HT:PCBM. A nanostructure thickness between 200 nm and 300 nm is determined to be optimal, while the LICM must have an index of refraction approximately 0.3 lower than P3HT:PCBM to produce absorption enhancements. Quasiguided modes that differ in lifetime by an order of magnitude are also identified and yield absorption that is concentrated in the P3HT:PCBM flash layer.

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