High-performance solution-based CdS-conjugated hybrid polymer solar cells

In this study, hybrid BHJ - bulk heterojunction polymer solar cells were fabricated by incorporating CdS quantum dots (QDs) in a blend of P3HT (donor) and PCBM (acceptor) using dichlorobenzene and chlorobenzene as solvents. CdS QDs at various ratios were mixed in a fixed amount of the P3HT and PCBM...

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Bibliographic Details
Published in:RSC advances 2018-01, Vol.8 (32), p.1851-1858
Main Authors: Imran, M, Ikram, M, Shahzadi, A, Dilpazir, S, Khan, H, Shahzadi, I, Yousaf, S. Amber, Ali, S, Geng, J, Huang, Y
Format: Article
Language:English
Subjects:
Absorption
Atomic force microscopy
Cadmium sulfide
Chemistry
Conjugation
Energy conversion efficiency
Heterojunctions
Microscopy
Photovoltaic cells
Polymer blends
Polymers
Quantum dots
Scanning electron microscopy
Short circuits
Solar cells
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Summary:In this study, hybrid BHJ - bulk heterojunction polymer solar cells were fabricated by incorporating CdS quantum dots (QDs) in a blend of P3HT (donor) and PCBM (acceptor) using dichlorobenzene and chlorobenzene as solvents. CdS QDs at various ratios were mixed in a fixed amount of the P3HT and PCBM blend. The prepared samples have been characterized by a variety of techniques such as I - V and EQE measurements, atomic force microscopy (AFM), scanning electron microscopy (SEM) and ultraviolet-visible (UV-vis) spectroscopy. The mixing of QDs in the polymer blends improved the PCE - power conversion efficiency of the solar cells under standard light conditions. The improved PCE from 2.95 to 4.41% is mostly due to the increase in the fill factor (FF) and short-circuit current ( J sc ) of the devices with an optimum amount of CdS in the P3HT:PCBM blend. The increase in J sc possibly originated from the formation of a percolation network of CdS. The conjugation of QDs has increased the absorption of the active layers in the visible region. These results well matched as reported, conjugation of CdS in the perovskite active layer increased the absorption and PCE of the devices relative to those of the perovskite films. This increment in parameters is attributed to the decrease in charge recombinations that improved the performance of the doped device. In this study, hybrid BHJ - bulk heterojunction polymer solar cells were fabricated by incorporating CdS quantum dots (QDs) in a blend of P3HT (donor) and PCBM (acceptor) using dichlorobenzene and chlorobenzene as solvents.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra01813h