期刊
ACS NANO
卷 8, 期 4, 页码 3302-3312出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn500222q
关键词
plasmonics; forward light scattering; metal nanoparticles; core-shell nanoparticles; organic photovoltaics
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology (MEST) [2012-0003991]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy, Republic of Korea, KAIST Institute for the NanoCentury [20133030000130]
- Institute for Basic Science in Korea
- National Research Foundation of Korea (NRF) - Korea Government (MEST) [2012-005624, 2008-05103]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20133030000130] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this report, we propose a metal-metal core-shell nanocube (NC) as an advanced plasmonic material for highly efficient organic solar cells (OSCs). We covered an Au core with a thin Ag shell as a scattering enhancer to build Au@Ag NCs, which showed stronger scattering efficiency than Au nanoparticles (AuNPs) throughout the visible range. Highly efficient plasmonic organic solar cells were fabricated by embedding Au@Ag NCs into an anodic buffer layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and the power conversion efficiency was enhanced to 6.3% from 5.3% in poly[N-9-hepta-decanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole)] (PCDTBT):16,6)-phenyl C-71-butyric acid methyl ester (PC70BM) based OSCs and 9.2% from 7.9% in polythieno[3,4-b]thiophene/benzodithiophene (PTB7):PC70BM based OSCs. The Au@Ag NC plasmonic PCDTBT:PC70BM-based organic solar cells showed 2.2-fold higher external quantum efficiency enhancement compared to AuNPs devices at a wavelength of 450-700 nm due to the amplified plasmonic scattering effect. Finally, we proved the strongly enhanced plasmonic scattering efficiency of Au@Ag NCs embedded in organic solar cells via theoretical calculations and detailed optical measurements.
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