eprintid: 10240
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/02/40
datestamp: 2023-11-09 16:36:52
lastmod: 2023-11-09 16:36:52
status_changed: 2023-11-09 16:30:55
type: article
metadata_visibility: show
creators_name: Shahid, M.U.
creators_name: Mohamed, N.M.
creators_name: Muhsan, A.S.
creators_name: Khatani, M.
creators_name: Bashiri, R.
creators_name: Zaine, S.N.A.
creators_name: Shamsudin, A.E.
title: Dual functional passivating layer of graphene/TiO2 for improved performance of dye-sensitized solar cells
ispublished: pub
keywords: Charge transfer; Dye-sensitized solar cells; Electrochemical impedance spectroscopy; Electrolytes; Exfoliation (materials science); Glass; High resolution transmission electron microscopy; Morphology; Nanocomposites; Oxide minerals; Passivation; Probes; Sonication; Tin oxides; Titanium dioxide, Compact layer; Exfoliation; Fto glass; Passivating layer; Probe sonication, Graphene
note: cited By 18
abstract: The FTO/TiO2 interface plays a crucial role in the performance of dye-sensitized solar cells (DSSCs). The uneven microstructure morphology of FTO (fluorine-doped tin oxide) glass surface and high porosity of TiO2 layer produce tiny gaps and voids at the FTO/TiO2 interface that breaks the connectivity, leading to an increase in the recombination process. In the current work, a dual functional passivating layer is introduced by the combination of the graphene/TiO2 compact layer. The excellent mobility and flexibility of graphene is capitalized using its layer to fill the voids in the FTO surface, which can consequently reduce the charge transfer resistance at the interface, while the added TiO2 compact layer avoids direct contact with the electrolyte thus reducing the recombination. Graphene was synthesized by the facile solvent exfoliation method with the assistance of the probe sonication process. The parameters of sonication were optimized to achieve high-quality concentrated graphene inks (0.177�0.51 mg/ml). Raman spectroscopy and transmission electron microscopy (TEM) revealed that the graphene obtained is of a few-layer type. Electrochemical impedance spectroscopy (EIS) analysis indicated that the incorporated compact layer of graphene/TiO2 was capable of accelerating the charge transfer and reducing the recombination process at the FTO/TiO2 interface. Consequently, the photoconversion efficiency (PCE) for the device (1 cm2 active area) with double-coated graphene layer under one sun irradiation (AM 1.5) was found to be 49.49 higher than the conventional one. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
date: 2018
publisher: Springer Nature
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058236839&doi=10.1007%2fs13204-018-0685-0&partnerID=40&md5=9eba8d9a8707dfbde12f8cda3bb1162a
id_number: 10.1007/s13204-018-0685-0
full_text_status: none
publication: Applied Nanoscience (Switzerland)
volume: 8
number: 5
pagerange: 1001-1013
refereed: TRUE
issn: 21905509
citation:   Shahid, M.U. and Mohamed, N.M. and Muhsan, A.S. and Khatani, M. and Bashiri, R. and Zaine, S.N.A. and Shamsudin, A.E.  (2018) Dual functional passivating layer of graphene/TiO2 for improved performance of dye-sensitized solar cells.  Applied Nanoscience (Switzerland), 8 (5).  pp. 1001-1013.  ISSN 21905509