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

M. Imran, M. Ikram, A. Shahzadi, S. Dilpazir, H. Khan, I. Shahzadi, S. Amber Yousaf, S. Ali, J. Geng*, Y. Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

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 (Jsc) of the devices with an optimum amount of CdS in the P3HT:PCBM blend. The increase in Jsc 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.

Original languageEnglish
Pages (from-to)18051-18058
Number of pages8
JournalRSC Advances
Volume8
Issue number32
DOIs
StatePublished - 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2018.

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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