Abstract

Dielectric/metal/dielectric (DMD) electrodes have the potential to significantly increase the absorption efficiency and photocurrent in flexible organic solar cells. We demonstrate that this enhancement is attributed to a broadband cavity resonance. Silver-based semitransparent DMD electrodes with sheet resistances below 10  ohm/sq. are fabricated on flexible polyethylene terephthalate (PET) substrates in a high-throughput roll-to-roll sputtering tool. We carefully study the effect of the semitransparent DMD electrode (here composed of ${\mathrm{Zn}}_x{\mathrm{Sn}}_y{\mathrm{O}}_z/\mathrm{Ag}/{\mathrm{In}}_x{\mathrm{Sn}}_y{\mathrm{O}}_z$) on the optical device performance of a copper phthalocyanine (CuPc)/fullerene (${\mathrm{C}}_{60}$) bilayer cell and illustrate that a resonant cavity enhanced light trapping effect dominates the optical behavior of the device.

© 2013 Optical Society of America

Absorption efficiency enhancement in inorganic and organic thin film solar cells via plasmonic honeycomb nanoantenna arrays

Rüştü Umut Tok and Kürşat Şendur
Opt. Lett. 38(16) 3119-3122 (2013)

Enhanced efficiency of light-trapping nanoantenna arrays for thin-film solar cells

Constantin Simovski, Dmitry Morits, Pavel Voroshilov, Michael Guzhva, Pavel Belov, and Yuri Kivshar
Opt. Express 21(S4) A714-A725 (2013)

Morphology-dependent light trapping in thin-film organic solar cells

Richard R. Grote, Steven J. Brown, Jeffrey B. Driscoll, Richard M. Osgood, and Jon A. Schuller
Opt. Express 21(S5) A847-A863 (2013)

Nano-patterned glass superstrates with different aspect ratios for enhanced light harvesting in a-Si:H thin film solar cells

Ting-Gang Chen, Peichen Yu, Yu-Lin Tsai, Chang-Hong Shen, Jia-Min Shieh, Min-An Tsai, and Hao-Chung Kuo
Opt. Express 20(S3) A412-A417 (2012)

Absorption enhancement in thin-film organic solar cells through electric and magnetic resonances in optical metamaterial

Chen Zhang, Weizhong Zhou, Shang Sun, Ningbo Yi, Qinghai Song, and Shumin Xiao
Opt. Mater. Express 5(9) 1954-1961 (2015)