eprintid: 16161
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/61/61
datestamp: 2023-12-19 03:22:43
lastmod: 2023-12-19 03:22:43
status_changed: 2023-12-19 03:05:45
type: article
metadata_visibility: show
creators_name: Samavati, Z.
creators_name: Samavati, A.
creators_name: Ismail, A.F.
creators_name: Borhani, T.N.
creators_name: Velashjerdi, M.
creators_name: Eisaabadi, B.G.
creators_name: Rostami, A.
creators_name: Othman, M.H.D.
creators_name: Awang, A.
title: Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology
ispublished: pub
note: cited By 4
abstract: The current paper examines the effects of zinc oxide nanostructure configurations, as photo-anode formations of organic solar cells, on the performance of power conversion. To this end, some experiments were conducted during which a near band edge emission red shift of ~ 0.11 eV from nanoparticles to vertically oriented nano-rods was observed. This bandgap narrowing promotes transferring of photo-excited electrons towards the conduction band of photo-anode. A ~ 48 decrease in the deep level emission intensity revealed a smaller non-radiative waves emission due to lower level of crystal disorder. Using vertically oriented zinc oxide nanorods as photo-anodes, the photovoltaic efficiency of the organic solar cell improved considerably. The nano-rod-structured photo-anodes showed a 0.22 V rise in the open-circuit voltage, from 0.76 to 0.98 V, and a 2.08 times increment in the overall conversion performance, compared to the zinc oxide nanoparticle-structured photo-anodes. This superior performance is attributed to a greater chance of charge recombination and light-trapping in the cells, more efficient light absorption, and high level of crystallinity that grants easier electron mobility for vertically oriented zinc oxide nanorods. Moreover, a lower charge-transfer resistance (0.85 Ω) was achieved due to better electro-catalytic action for oxygen reduction for vertical nanorods compared to the other two zinc oxide configurations (1.62 Ω and 4.06 Ω). This boosted the cell performance by increasing the short-circuit current density (JSC). The fabricated solar cell may contribute to sustainable and environmentally friendly electricity generation process through reducing the consumption of non-renewable energy sources. © 2021, The Author(s), under exclusive licence to Islamic Azad University.
date: 2022
publisher: Springer Medizin
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127489479&doi=10.1007%2fs40097-021-00453-2&partnerID=40&md5=b8a918c336a579457b5358af071d4592
id_number: 10.1007/s40097-021-00453-2
full_text_status: none
publication: Journal of Nanostructure in Chemistry
volume: 12
number: 6
pagerange: 1119-1130
refereed: TRUE
issn: 20089244
citation:   Samavati, Z. and Samavati, A. and Ismail, A.F. and Borhani, T.N. and Velashjerdi, M. and Eisaabadi, B.G. and Rostami, A. and Othman, M.H.D. and Awang, A.  (2022) Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology.  Journal of Nanostructure in Chemistry, 12 (6).  pp. 1119-1130.  ISSN 20089244