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Hole-Collecting Treated Graphene Layer and PTB7:PC71BM-Based Bulk-Heterojunction OPV with Improved Carrier Collection and Photovoltaic Efficiency
Santanu Maity,
Published in Institute of Electrical and Electronics Engineers Inc.
2018
Volume: 65
   
Issue: 10
Pages: 4548 - 4554
Abstract
We report a bidirectional, treated graphene oxide electrode-based organic bulk heterojunction solar cell. The nature of interfaces in the photoactive region (between PTB7/PC71BM), charge transport, and the role of treated graphene's transparency in the device performance are investigated. Use of treated graphene reduces the sheet resistance (200-75 Ω/sq) of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate thin film and improves the organic solar cell performance over a wide spectral range (250-750 nm). Due to: 1) the charge neutrality between PTB7 and PC71BM and 2) lowering of defect states in the electron collection layer, the overall solar cell power conversion efficiency (η) reaches 8.4% ± 0.23%; a fill factor of 69.5%, short-circuit current density of ∼16.1 mA · cm-2, and internal quantum efficiency of 68.8%. © 2018 IEEE.
About the journal
JournalData powered by TypesetIEEE Transactions on Electron Devices
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open AccessNo
Concepts (17)
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    Collector efficiency
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    Efficiency
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    Graphene
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    GRAPHITE ELECTRODES
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    Heterojunctions
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    Organic solar cells
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    Quantum theory
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    Solar power generation
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    Carrier collection
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    ELECTRON COLLECTION LAYERS
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    GRAPHENE ELECTRODES
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    Internal quantum efficiency
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    ORGANIC BULK-HETEROJUNCTION SOLAR CELLS
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    PHOTO-VOLTAIC EFFICIENCY
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    Poly-3 ,4-ethylenedioxythiophene
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    Solar cell performance
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    Solar cells