Aqueous-processed insulating polymer/nanocrystal solar cells with effective suppression of the leakage current and carrier recombination |
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| Institution: | 1. College of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University, Changchun 130024, China;2. College of Material and Chemical Engineering, Chuzhou University, Chuzhou 239000, China;3. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China;1. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;2. School of Life Sciences, University of Science and Technology of China, Hefei 230027, China;3. Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China;1. Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China;2. Department of Chemistry, School of Science, Tianjin University, Tianjin 300000, China;1. Laboratory of Physical Chemistry of Materials, Department of Physics, Faculty of Sciences of Monastir, University of Monastir, 5019, Tunisia;2. Laboratory for Research in Energy and Matter, CNSTN, Sidi Thabet Technopark, 2020, Tunisia;3. Department of Physics, Faculty of Science and Arts in Samtha, Jazan University, Jazan, Saudi Arabia;4. Laboratory of Applied Physics, Faculty of Sciences of Sfax, University of Sfax, PB 1171, 3000, Sfax, Tunisia;5. Institut Neel, CNRS–Université J. Fourier, BP166, 38042, Grenoble, France;1. Department of Materials Science and Engineering, National Tsing Hua University, HsinChu, Taiwan;2. Department of Chemistry, National Taiwan University, Taipei, Taiwan |
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| Abstract: | As one of the most environmentally friendly photovoltaic(PV) conversion equipments,aqueousprocessed CdTe nanocrystal solar cells(NC SCs) have attracted great interest in recent years because of their excellent properties such as high charge-carrier mobility and broad absorption.However,two issues including interfacial recombination and leakage current seriously restrict their performance.In this paper,insulating polymer poly(vinyl pyrrolidone)(PVP) is introduced into CdTe NC SCs to solve the problems.The experimental results of transmission electron microscopy(TEM),atomic force micro scopy(AFM) and dark current measurements,etc.,demonstrate the leakage current is effectively suppressed by introducing PVP.Through further designing device structure,the reduction of interfacial recombination after introducing PVP is confirmed.By strategically taking the advantages of PVP properties(e.g.,water solubility and thermostability),the power conversion efficiency of the devices with PVP is enhanced by almost 37% compared to pure CdTe devices.This work demonstrates an effective and low-cost method to fabricate NC SCs via aqueous route.Moreover,it also proves that appropriate content of insulating polymer is of beneficial in promoting the PV performance. |
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| Keywords: | Aqueous-processed Polymer Nanocrystal Recombination Leakage current |
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