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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 7 — Mar. 26, 2012
  • pp: 8175–8185

Light harvesting improvement of organic solar cells with self-enhanced active layer designs

Luzhou Chen, Wei E.I. Sha, and Wallace C.H. Choy  »View Author Affiliations


Optics Express, Vol. 20, Issue 7, pp. 8175-8185 (2012)
http://dx.doi.org/10.1364/OE.20.008175


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Abstract

We present designs of organic solar cells (OSCs) incorporating periodically arranged gradient type active layer. The designs can enhance light harvesting with patterned organic materials themselves (i.e. self-enhanced active layer design) to avoid degrading electrical performances of OSCs in contrast to introducing inorganic concentrators into OSC active layers such as silicon and metallic nanostructures. Geometry of the OSC is fully optimized by rigorously solving Maxwell’s equations with fast and efficient scattering matrix method. Optical absorption is accessed by a volume integral of the active layer excluding the metallic absorption. Our numerical results show that the OSC with a self-enhanced active layer, compared with the conventional planar active layer configuration, has broadband and wide-angle range absorption enhancement due to better geometric impedance matching and prolonged optical path. This work provides a theoretical foundation and engineering reference for high performance OSC designs.

© 2012 OSA

OCIS Codes
(350.6050) Other areas of optics : Solar energy
(230.5298) Optical devices : Photonic crystals

ToC Category:
Solar Energy

History
Original Manuscript: February 2, 2012
Revised Manuscript: March 16, 2012
Manuscript Accepted: March 16, 2012
Published: March 23, 2012

Citation
Luzhou Chen, Wei E.I. Sha, and Wallace C.H. Choy, "Light harvesting improvement of organic solar cells with self-enhanced active layer designs," Opt. Express 20, 8175-8185 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-7-8175


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