Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique

In this work, ZnO Dye-sensitized solar cells (DSSCs) with dye re-adsorption technique and NiO thin films coated as n-p junction were investigated. The general structures of ZnO DSSCs were FTO/ZnO as a photo-electrode, Eosin-Y as a dye sensitizer, iodine/iodide solution as an electrolyte and Pt/FTO a...

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Main Authors: Surat Futemvong, Niyom Hongsith, Duangmanee Wongratanaphisan, Atcharawon Gardchareon, Supab Choopun
Format: Journal
Published: 2018
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84888099778&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/47481
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spelling th-cmuir.6653943832-474812018-04-25T08:40:33Z Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique Surat Futemvong Niyom Hongsith Duangmanee Wongratanaphisan Atcharawon Gardchareon Supab Choopun In this work, ZnO Dye-sensitized solar cells (DSSCs) with dye re-adsorption technique and NiO thin films coated as n-p junction were investigated. The general structures of ZnO DSSCs were FTO/ZnO as a photo-electrode, Eosin-Y as a dye sensitizer, iodine/iodide solution as an electrolyte and Pt/FTO as a counter-electrode. For dye re-adsorption technique, ZnO photo-electrodes were soaked into Eosin-Y solutions as dye adsorption, then soaked into ethanol as dye desorption (3-step sequence). From the absorption spectra, the absorbance values depended on the dye re-adsorption steps suggesting the removal of the excess dye molecules during the process. For n-p junction, NiO thin films were coated on ZnO with 0.6 mg to form a barrier layer in photo-electrode called ZnO/NiO. The optimum conditions for the dye re-adsorption technique were selected with n-p junction DSSCs. The DSSCs were investigated by using J-V measurement and electrochemical impedance spectroscopy. It was found that ZnO and ZnO/NiO DSSCs with first dye re-adsorption exhibited the highest energy conversion efficiency of 0.99% and 1.10%, respectively. The improvement of energy conversion efficiency due to dye re-adsorption and n-p junction can be explained in terms of reduction of dye aggregation and decrease of charge recombination in photo-electrode. 2018-04-25T08:40:33Z 2018-04-25T08:40:33Z 2013-11-27 Journal 01252526 2-s2.0-84888099778 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84888099778&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/47481
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
description In this work, ZnO Dye-sensitized solar cells (DSSCs) with dye re-adsorption technique and NiO thin films coated as n-p junction were investigated. The general structures of ZnO DSSCs were FTO/ZnO as a photo-electrode, Eosin-Y as a dye sensitizer, iodine/iodide solution as an electrolyte and Pt/FTO as a counter-electrode. For dye re-adsorption technique, ZnO photo-electrodes were soaked into Eosin-Y solutions as dye adsorption, then soaked into ethanol as dye desorption (3-step sequence). From the absorption spectra, the absorbance values depended on the dye re-adsorption steps suggesting the removal of the excess dye molecules during the process. For n-p junction, NiO thin films were coated on ZnO with 0.6 mg to form a barrier layer in photo-electrode called ZnO/NiO. The optimum conditions for the dye re-adsorption technique were selected with n-p junction DSSCs. The DSSCs were investigated by using J-V measurement and electrochemical impedance spectroscopy. It was found that ZnO and ZnO/NiO DSSCs with first dye re-adsorption exhibited the highest energy conversion efficiency of 0.99% and 1.10%, respectively. The improvement of energy conversion efficiency due to dye re-adsorption and n-p junction can be explained in terms of reduction of dye aggregation and decrease of charge recombination in photo-electrode.
format Journal
author Surat Futemvong
Niyom Hongsith
Duangmanee Wongratanaphisan
Atcharawon Gardchareon
Supab Choopun
spellingShingle Surat Futemvong
Niyom Hongsith
Duangmanee Wongratanaphisan
Atcharawon Gardchareon
Supab Choopun
Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique
author_facet Surat Futemvong
Niyom Hongsith
Duangmanee Wongratanaphisan
Atcharawon Gardchareon
Supab Choopun
author_sort Surat Futemvong
title Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique
title_short Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique
title_full Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique
title_fullStr Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique
title_full_unstemmed Energy conversion efficiency improvement of ZnO dye-sensitized solar cells by dye re-adsorption and N-P junction technique
title_sort energy conversion efficiency improvement of zno dye-sensitized solar cells by dye re-adsorption and n-p junction technique
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84888099778&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/47481
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