Broad-band plasmonic Cu-Au bimetallic nanoparticles for organic bulk heterojunction solar cells |
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| Affiliation: | 1. College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China;2. College of Chemistry, Testing and Analysis Center, Soochow University, Suzhou 215006, China;3. Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215163, China;1. Department of Microbiology, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia;2. Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, 11757, Cairo, Egypt;3. Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA), Department of Physics, Faculty of Education, Ain Shams University, Roxy, 11757, Cairo, Egypt;4. Department of Microbiology, National Organization for Drug Control and Research (NODCAR), Cairo, Egypt;5. Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia;6. Metallurgical Lab.1., Semiconductor Lab., Department of Physics, Faculty of Education, Ain Shams University, Roxy, 11757, Cairo, Egypt;7. Pathology Department, College of Medicine, King Khalid University, Saudi Arabia;8. Department of Physics, College of Science, University of Jeddah, Jeddah, Saudi Arabia;1. College of Energy, Soochow Institute for Energy and Materials InnovationS, Soochow University, Suzhou, Jiangsu 215006, China;2. Department of Chemistry, Chemical Engineering Division, Technical University Berlin, Berlin 10623, Germany;1. Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, India;2. Department of Physics and Astronomy, Indian Institute of Technology Kharagpur, Kharagpur, India;3. Amity University, Noida 201313, Uttar Pradesh, India;1. School of Physics and Materials Science, Anhui University, Hefei 230601, China;2. Anhui Key Laboratory of Information Materials and Devices, Hefei 230601, China |
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| Abstract: | In this work, a facile preparation of Cu-Au bimetallic nanoparticles (NPs) with core-shell nanostructures is reported. Importantly, as-prepared Cu-Au NPs are highly stable, solution-processable and exhibit a broad localized surface plasmon resonance (LSPR) band at long wavelengths of 550–850 nm. Highly efficient plasmonic organic solar cells (OSCs) were fabricated by embedding Cu-Au NPs in an anodic poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) layer. The average power conversion efficiency (PCE) was enhanced from 3.21% to 3.63% for poly(3-hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PC61BM) based devices, from 6.51% to 7.13% for poly(ethylhexyl-thiophenyl)-benzodithiophene -(ethylhexyl)-thienothiophene](PTB7-th):PC61BM based devices and from 7.53% to 8.48% for PTB7-th:PC71BM based devices, corresponding to 9.5–13.4% PCE improvement. Such an improvement is very comparable to that (12.5%) obtained in those with plasmonic Au NPs but achieved at lower cost. This study thus demonstrates a novel and cost-effective approach to enhance the photovoltaic performance of OSCs, in combination with the broad-band plasmonic Cu-Au bimetallic nanostructures. |
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| Keywords: | Organic solar cells Plasmonics Copper-gold nanoparticles Core-shell nanostructures Broad-band absorption Hole transport layer |
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