Surface modification of ZnO nanorods with CdS quantum dots for application in inverted organic solar cells: effect of deposition duration

Hind Fadhil Oleiwi, Azmi Zakaria, Chi Chin Yap, Sin Tee Tan, Hock Beng Lee, Chun Hui Tan, Riski Titian Ginting, Abdelelah Alshanableh, Zainal Abidin Talib

Research output: Contribution to journalArticle

Abstract

Incorporating cadmium sulfide quantum dots (CdS QDs) onto ZnO nanorod (ZNRs) has been investigated to be an efficient approach to enhance the photovoltaic performance of the inverted organic solar cell (IOSC) devices based on ZNRs/poly (3-hexylthiophene) (P3HT). To synthesize CdS/ZNRs, different durations of deposition per cycle from 1 to 9 min were used to deposit CdS via SILAR technique onto ZNRs surface grown via hydrothermal method at low temperature on FTO substrate. In typical procedures, P3HT as donor polymer were spun-coating onto CdS/ZNRs to fabricate IOSC devices, followed by Ag deposition as anode by magnetron sputtering technique. Incorporation of CdS QDs has modified the morphological, structural, and optical properties of ZNRs. Incorporation of CdS QDs onto ZNRs also led to higher open circuit voltage (Voc) and short circuit current density (Jsc) of optimum ZNRs/CdS QDs devices due to the increased interfacial area between ZNRs and P3HT for more efficient exciton dissociation, reduced interfacial charge carrier recombination as a result of lower number of oxygen defects which act as electron traps in ZnO and prolonged carrier recombination lifetime. Therefore, the ZNRs/CdS QDs/P3HT device exhibited threefold higher PCE (0.55%) at 5 min in comparison to pristine ZNR constructed device (0.16%). Overall, our study highlights the potential of ZNRs/CdS QDs to be excellent electron acceptors for high efficiency hybrid optoelectronic devices.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalJournal of Materials Science: Materials in Electronics
DOIs
Publication statusAccepted/In press - 21 Dec 2017

Fingerprint

Nanorods
nanorods
Semiconductor quantum dots
Surface treatment
solar cells
quantum dots
Cadmium sulfide
cadmium sulfides
Organic solar cells
Electron traps
Open circuit voltage
short circuit currents
optoelectronic devices
open circuit voltage
Charge carriers
Excitons
Short circuit currents
Optoelectronic devices
Magnetron sputtering
cadmium sulfide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Surface modification of ZnO nanorods with CdS quantum dots for application in inverted organic solar cells : effect of deposition duration. / Oleiwi, Hind Fadhil; Zakaria, Azmi; Yap, Chi Chin; Tan, Sin Tee; Lee, Hock Beng; Tan, Chun Hui; Ginting, Riski Titian; Alshanableh, Abdelelah; Talib, Zainal Abidin.

In: Journal of Materials Science: Materials in Electronics, 21.12.2017, p. 1-9.

Research output: Contribution to journalArticle

Oleiwi, Hind Fadhil ; Zakaria, Azmi ; Yap, Chi Chin ; Tan, Sin Tee ; Lee, Hock Beng ; Tan, Chun Hui ; Ginting, Riski Titian ; Alshanableh, Abdelelah ; Talib, Zainal Abidin. / Surface modification of ZnO nanorods with CdS quantum dots for application in inverted organic solar cells : effect of deposition duration. In: Journal of Materials Science: Materials in Electronics. 2017 ; pp. 1-9.
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