High-performance and stability bifacial flexible self-powered perovskite photodetector by surface plasmon resonance and hydrophobic treatments |
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| Affiliation: | 1. School of Precision Instrument & Optoelectronics Engineering, Tianjin University, Tianjin, 300072, China;2. Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University, Tianjin, 300072, China;3. School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology; Suzhou, 215006, China;4. Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215006, China;5. Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University, Tianjin, 300072, China;6. Luoyang Institute of Electro-Optical Equipment, AVIC, Luoyang, 471009, China;1. Department of Physics and Information Engineering, Shangqiu Normal University, Shangqiu 476000, PR China;2. Institute of Photo-electronic Thin Film Devices and Technology of Nankai University, Weijin Road 94#, Nankai District, Tianjin 300071, PR China;1. Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea;2. Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea;1. Department of Mechanical Engineering, The University of Hong Kong, Pok Fu Lam, Hong Kong, China;2. HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI), Hangzhou, Zhejiang, 311305, China;3. Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, China |
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| Abstract: | Flexible semitransparent photodetectors based on perovskites provide merits in terms of light weight and bifacial advantages but suffer from poor stability. To simultaneously enhance the performance and stability of flexible perovskite photodetectors (PPDs), silver (Ag) nanoparticles are incorporated to improve the responsiveness through the surface plasmon resonance (SPR) effect in the bulk of perovskite layer, and block copolymer F68 is employed to increase the surface hydrophobicity of perovskite film to keep long-term stable devices. Ag@polyvinyl pyrrolidone (PVP) core shell structure enables the sufficiently enhanced film light absorption and device quantum efficiency following the SPR response curve, the amphiphilic F68 make the perovskite less vulnerable to humid ambient exposure. Moreover, the sputtered transparent indium tin oxide back electrode enables the double facial operability of our flexible self-powered photodetectors with a bifacial factor of 80% and improved stability as well. Addressing the poor responsiveness and instability issues extends the potential broad applications of our bifacial flexible perovskite photodetectors. |
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| Keywords: | Flexible perovskite photodetector Self-powered photodetector Bifacial photodetector Surface plasmon resonance Hydrophobic treatment |
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