eprintid: 1570215
rev_number: 31
eprint_status: archive
userid: 608
dir: disk0/01/57/02/15
datestamp: 2017-08-15 10:20:36
lastmod: 2021-09-26 22:20:24
status_changed: 2017-08-15 10:20:36
type: article
metadata_visibility: show
creators_name: Wang, M
creators_name: Hossain, MA
creators_name: Choy, KL
title: Effect of Sodium Treatment on the Performance of Electrostatic Spray Assisted Vapour Deposited Copper-poor Cu(In,Ga)(S,Se)2 Solar Cells
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F62
divisions: ZZN
keywords: Devices for energy harvesting, Solar cells
note: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
abstract: In our work, eco-friendly, non-vacuum and low cost Electrostatic Spray Assisted Vapour Deposition (ESAVD) method has been used to produce Cu(In,Ga)(S,Se) 2 (CIGS) solar cells. Copper (Cu) deficient (Cu/In + Ga = 0.76) CIGS films were designed to avoid the rather dangerous KCN treatment step for the removal of conductive minor phases of Cu 2 S/Cu 2 Se. A simple sodium (Na) treatment method was used to modify the morphology and electronic properties of the absorber and it clearly improved the solar cell performance. The SEM and XRD results testified a slightly increase of the grain size and (112) crystal orientation in the Na-incorporated CIGS thin films. From the Mott-schottky results, it can be seen that the functions of the Na treatment in our non-vacuum deposited CIGS are mainly used for defect passivation and reduction of charge recombination. Photovoltaic characteristics and j-V curve demonstrated that the dipping of CIGS films in 0.2 M NaCl solution for 20 minutes followed by selenization at 550 °C under selenium vapor resulted in the optimum photovoltaic performance, with j sc , V oc , FF and η of the optimized solar cell of 29.30 mA cm -2 , 0.564 V, 65.59% and 10.83%, respectively.
date: 2017-07-28
date_type: published
official_url: http://doi.org/10.1038/s41598-017-07027-9
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
article_type_text: Journal Article
verified: verified_manual
elements_id: 1413362
doi: 10.1038/s41598-017-07027-9
lyricists_name: Choy, Kwang
lyricists_name: Wang, Mingqing
lyricists_id: KLCHO01
lyricists_id: MWANA09
actors_name: Wang, Mingqing
actors_id: MWANA09
actors_role: owner
full_text_status: public
publication: Scientific Reports
volume: 7
number: 1
article_number: 6788
issn: 2045-2322
citation:        Wang, M;    Hossain, MA;    Choy, KL;      (2017)    Effect of Sodium Treatment on the Performance of Electrostatic Spray Assisted Vapour Deposited Copper-poor Cu(In,Ga)(S,Se)2 Solar Cells.                   Scientific Reports , 7  (1)    , Article 6788.  10.1038/s41598-017-07027-9 <https://doi.org/10.1038/s41598-017-07027-9>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1570215/1/Wang-M_Na%20%20treated%20CIGS%20scientific%20report%20merged_1495532309_vor.pdf