X-ray photoelectron spectroscopy analysis of magnetron sputtered Cu2ZnSnS4 based thin film solar cells with CdS buffer layer
tarafından
 
Cantaş Bağdaş, Ayten, author.

Başlık
X-ray photoelectron spectroscopy analysis of magnetron sputtered Cu2ZnSnS4 based thin film solar cells with CdS buffer layer

Yazar
Cantaş Bağdaş, Ayten, author.

Yazar Ek Girişi
Cantaş Bağdaş, Ayten, author.

Fiziksel Tanımlama
xvi, 170 leaves: illustrarions, charts;+ 1 computer laser optical disc.

Özet
Cu2ZnSnS4 (CZTS) is a novel quaternary compound which contains Cu, Zn, Sn and S elements. It is a p-type semiconductor which has been taken attention in the last years as an absorber layer. Since it consists of abundant, low cost and non-toxic elements, it is one of the most promising candidate as an absorber layer for thin film photovoltaic (PV) application. Having high absorption coefficient, low bandgap value which is theoretically in desired range make this material attractive for solar cell application. In this thesis, CZTS absorber layers were grown using two stages which are the magnetron sputtering of metallic precursors, followed by a heat treatment under sulfur vapor atmosphere. Two types of CZTS were grown such as SLG/Mo/Cu (55nm)/Sn/Zn/Cu (120nm) and SLG/Mo/Cu (120nm)/Sn/Zn/Cu (55nm). For the same stacking order, the effect of Cu thickness sequentially grown with Sn layer on the film quality were investigated. The optical properties, microstructure, surface and bulk composition of CZTS films were investigated in detail. This study revealed a correlation between the CZTS stacking order having different thickness of Cu layer and the improvement of film quality, which was also confirmed by the photo-conversion efficiency of the fabricated devices. In this work, the other investigated layer is CdS which is an n-type semiconductor with bandgap energy of 2.4 eV. Since CdS has well lattice match with the heterojunction between CdS and CZTS, it is one of the most preferred material as a buffer layer for solar cells. In this work CdS buffer layers were deposited by chemical bath deposition technique. The optimization of CdS layers were occurred and optical, structural, bulk and surface compositions were investigated in detail. Finally, SLG/Mo/CZTS/CdS/i-ZnO/AZO devices were fabricated. The effect of structure properties of CZTS films and the thickness of CdS buffer layer on efficiency of fabricated solar cells were investigated.

Konu Başlığı
Solar cells -- Materials.
 
Photovoltaic cells -- Materials.
 
Thin films -- Magnetic properties.
 
X-ray photoelectron spectroscopy.
 
Photoelectron spectroscopy.
 
Magnetron sputtering.
 
Copper-zinc alloys.

Yazar Ek Girişi
Özyüzer, Lütfi,

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Physics.

Tek Biçim Eser Adı
Thesis (Doctoral)--İzmir Institute of Technology: Physics.
 
İzmir Institute of Technology:Physics--Thesis (Doctoral).

Elektronik Erişim
Access to Electronic Versiyon.


LibraryMateryal TürüDemirbaş NumarasıYer Numarası
IYTE LibraryTezT001639QC715.4 .C22 2017