Optical and electrical study of organic solar cells with a 2D grating anode

Optics Express
Wei E I ShaWeng Cho Chew

Abstract

We investigate both optical and electrical properties of organic solar cells (OSCs) incorporating 2D periodic metallic back grating as an anode. Using a unified finite-difference approach, the multiphysics modeling framework for plasmonic OSCs is established to seamlessly connect the photon absorption with carrier transport and collection by solving the Maxwell's equations and semiconductor equations (Poisson, continuity, and drift-diffusion equations). Due to the excited surface plasmon resonance, the significantly nonuniform and extremely high exciton generation rate near the metallic grating are strongly confirmed by our theoretical model. Remarkably, the nonuniform exciton generation indeed does not induce more recombination loss or smaller open-circuit voltage compared to 1D multilayer standard OSC device. The increased open-circuit voltage and reduced recombination loss by the plasmonic OSC are attributed to direct hole collections at the metallic grating anode with a short transport path. The work provides an important multiphysics understanding for plasmonic organic photovoltaics.

References

Dec 24, 2008·Optics Express·K R Catchpole, A Polman
Feb 20, 2010·Nature Materials·Harry A Atwater, Albert Polman
Aug 19, 2010·Advanced Materials·Christoph J BrabecShawn P Williams
Jul 14, 2011·ACS Nano·Jun YangYang Yang
Sep 22, 2011·Optics Express·Wei E I ShaWeng Cho Chew

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Citations

Feb 19, 2013·Advanced Materials·Qiaoqiang GanZakya H Kafafi
Jul 14, 2016·Scientific Reports·Yutao Zhang, Yimin Xuan
Jul 1, 2014·Nanoscale·Chun-Hsien Chou, Fang-Chung Chen
Nov 15, 2016·Advanced Science·Qing-Dong OuJian-Xin Tang
Jun 13, 2014·Optics Express·Yunlu Xu, Jeremy N Munday

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