PUBLICATIONS

Advanced Devices for Energy Conversion

Journals

Scientific Reports
년도 2013
학술지명 Scientific Reports
논문명 Plasmonic Forward Scattering Effect in Organic Solar Cells: A Powerful Optical Engineering Method
게재권/집 3
수록페이지 1726
저자명 Se-Woong Baek, Jonghyeon Noh, Chun-Ho Lee, BongSoo Kim, Min-Kyo Seo, and Jung-Yong Lee*
Link 관련링크 https://doi.org/10.1038/srep01726 2029회 연결

Abstract


In this report, plasmonic effects in organic photovoltaic cells (OPVs) are systematically analyzed using size-controlled silver nanoparticles (AgNPs, diameter: 10 ~ 100 nm), which were incorporated into the anodic buffer layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The optical properties of AgNPs tuned by size considerably influence the performance levels of devices. The power conversion efficiency (PCE) was increased from 6.4% to 7.6% in poly[N-9-hepta-decanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole)] (PCDTBT):[6,6]-phenyl C71-butyric acid methyl ester (PC70BM) based-OPVs and from 7.9% to 8.6% in polythieno[3,4-b]thiophene/benzodithiophene (PTB7):PC70BM based-OPVs upon embedding the AgNPs. The external quantum efficiency (EQE) was significantly enhanced by the absorption enhancement due to the plasmonic scattering effect. Finally, we verified the origin of the size-dependent plasmonic forwarding scattering effect of the AgNPs by visualizing the scattering field with near-field optical microscopy (NSOM) and through analytic optical simulations.