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

Title
Absorption and quasiguided mode analysis of organic solar cells with photonic crystal photoactive layers
Authors
John R. Tumbleston고두현Edward T. SamulskiRene Lopez
Issue Date
2009-04
Publisher
Optics express
Citation
VOL 17, NO 9, 7670-7681
Abstract
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 ∼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 ∼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.
URI
http://pubs.kist.re.kr/handle/201004/47991
ISSN
10944087
Appears in Collections:
KIST Publication > Article
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