High‐Efficiency Polymer Solar Cells Achieved by Doping Plasmonic Metallic Nanoparticles into Dual Charge Selecting Interfacial Layers to Enhance Light Trapping |
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| Authors: | Xi Yang Chu‐Chen Chueh Chang‐Zhi Li Hin‐Lap Yip Peipei Yin Hongzheng Chen Wen‐Chang Chen Alex K‐Y Jen |
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| Institution: | 1. Department of Materials Science & Engineering, University of Washington, Seattle, WA 98195, USA;2. State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Zhejiang‐California International Nanosystems Institute, Zhejiang University, Hangzhou 310027, P. R. China;3. Department of Chemical Engineering and Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan |
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| Abstract: | Significantly increased power conversion efficiency (PCE) of polymer solar cells (PSCs) is achieved by applying a plasmonic enhanced light trapping strategy to a low bandgap conjugated polymer, poly(indacenodithiophene‐ co‐phananthrene‐quinoxaline) (PIDT‐PhanQ) and 6,6]‐phenyl‐C71‐butyric acid methyl ester (PC71BM) based bulk‐heterojunction (BHJ) system. By doping both the rear and front charge‐selecting interfacial layers of the device with different sizes of Au NPs, the PCE of the devices is improved from 6.65% to 7.50% (13% enhancement). A detailed study of processing, characterization, microscopy, and device fabrication is conducted to understand the underlying mechanism for the enhanced device performance. The success of this work provides a simple and generally applicable approach to enhance light harnessing of low bandgap polymers in PSCs. |
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| Keywords: | high‐efficiency polymer solar cells plasmonics light trapping gold nanoparticles interfacial layer low band‐gap polymers |
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