Current Applied Physics

Korean Physical Society (한국물리학회)
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Synergy study on charge transport dynamics in hybrid organic solar cell: Photocurrent mapping and performance analysis under local spectrum

  • Hong, Kai Jeat (School of Applied Physics, Faculty Science and Technology, University Kebangsaan Malaysia) ;
  • Tan, Sin Tee (School of Applied Physics, Faculty Science and Technology, University Kebangsaan Malaysia) ;
  • Chong, Kok-Keong (Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman) ;
  • Lee, Hock Beng (Department of Flexible and Printable Electronics, Chonbuk National University) ;
  • Ginting, Riski Titian (Department of Electrical Engineering, Universitas Prima Indonesia) ;
  • Lim, Fang Sheng (Advanced Engineering Platform, Mechanical Engineering Discipline, School of Engineering, Monash University Malaysia) ;
  • Yap, Chi Chin (School of Applied Physics, Faculty Science and Technology, University Kebangsaan Malaysia) ;
  • Tan, Chun Hui (School of Applied Physics, Faculty Science and Technology, University Kebangsaan Malaysia) ;
  • Chang, Wei Sea (Advanced Engineering Platform, Mechanical Engineering Discipline, School of Engineering, Monash University Malaysia) ;
  • Jumali, Mohammad Hafizuddin Hj (School of Applied Physics, Faculty Science and Technology, University Kebangsaan Malaysia)
  • Received : 2018.08.11
  • Accepted : 2018.10.11
  • Published : 2018.12.31
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Abstract

Charge transport dynamics in ZnO based inverted organic solar cell (IOSC) has been characterized with transient photocurrent spectroscopy and localised photocurrent mapping-atomic force microscopy. The value of maximum exciton generation rate was found to vary from $2.6{\times}10^{27}m^{-3}s^{-1}$ ($J_{sat}=79.7A\;m^{-2}$) to $2.9{\times}10^{27}m^{-3}s^{-1}$ ($J_{sat}=90.8A\;m^{-2}$) for devices with power conversion efficiency ranging from 2.03 to 2.51%. These results suggest that nanorods served as an excellent electron transporting layer that provides efficient charge transport and enhances IOSC device performance. The photovoltaic performance of OSCs with various growth times of ZnO nanorods have been analysed for a comparison between AM1.5G spectrum and local solar spectrum. The simulated PCE of all devices operating under local spectrum exhibited extensive improvement with the gain of 13.3-3.7% in which the ZnO nanorods grown at 15 min possess the highest PCE under local solar with the value of 2.82%.

Keywords

Acknowledgement

Supported by : ministry of highest education Malaysia (MOHE)

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