DocumentCode :
3607502
Title :
Toward a Better Understanding of the Use of Additives in Zn(S,O) Deposition Bath for High-Efficiency Cu(In,Ga)Se2-Based Solar Cells
Author :
Hildebrandt, Thibaud ; Loones, Nicolas ; Bouttemy, Muriel ; Vigneron, Jackie ; Etcheberry, Arnaud ; Lincot, Daniel ; Naghavi, Negar
Author_Institution :
ILV, Univ. of Versailles St.-Quentin, Versailles, France
Volume :
5
Issue :
6
fYear :
2015
Firstpage :
1821
Lastpage :
1826
Abstract :
The purpose of this paper is to focus on the impact of the use of peroxide during the chemical bath deposition (CBD) of Zn(S,O) buffer layer on its deposition rate and on the performance of Cu(In,Ga)Se2 (CIGSe)/CBD Zn(S,O)-based solar cells. For that, the effect of two peroxides have been compared: H2O2 and (NH4)2S2O8. Based on in-situ quartz μ-balance analyses, it has been shown that while it is necessary to introduce an important concentration of H2O2 (at least 0.11 M) to accelerate the deposition rate of Zn(S,O) layers, only 10-3 M of S2O82- is enough to improve highly its deposition rate. Moreover, X-ray photoelectron spectroscopy analyses have shown that the introduction of H2O2 in Zn(S,O) deposition bath leads to an oxidation of the CIGSe surface, which is not the case when persuflate or peroxodisulfate is used in very low concentration. Based on electrical characterization of CIGSe/CBD Zn(S,O)-based solar cells, it appears that the use of persulfate allows not only a decrease in metastable behavior of solar cells, which is generally observed with hydrogen peroxide, but the outperfomance of CdS-buffered reference cells as well.
Keywords :
X-ray photoelectron spectra; buffer layers; copper compounds; gallium compounds; indium compounds; liquid phase deposition; oxidation; solar cells; ternary semiconductors; zinc compounds; Cu(InGa)Se2; X-ray photoelectron spectroscopy; Zn(SO); buffer layer; chemical bath deposition; deposition rate; electrical characterization; hydrogen peroxide; oxidation; peroxodisulfate; persuflate; solar cells; Additives; Buffer layers; Copper compounds; Hydrogen; Photovoltaic cells; Substrates; Surface treatment; Alternative buffer layer; Cu(In; Ga)Se2 (CIGSe) photovoltaics; O); chemical bath deposition (CBD) Zn(S;
fLanguage :
English
Journal_Title :
Photovoltaics, IEEE Journal of
Publisher :
ieee
ISSN :
2156-3381
Type :
jour
DOI :
10.1109/JPHOTOV.2015.2478066
Filename :
7287735
Link To Document :
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