Magnetron Sputtered Molybdenum Oxide for Application in Polymers Solar Cells

INERA Conference: Vapor Phase Technologies for Metal Oxide and Carbon Nanostructures

物理学;材料科学

Sendova-Vassileva, M.^1 ; Dikov, Hr^1 ; Vitanov, P.^1 ; Popkirov, G.^1 ; Gergova, R.^1 ; Grancharov, G.^2 ; Gancheva, V.^2

Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, Sofia

1784, Bulgaria^1

Laboratory of Structure and Properties of Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Sofia

1113, Bulgaria^2

关键词: Deposition technique;    Hole transport layers;    Poly-3 ,4-ethylenedioxythiophene;    Polystyrene sulfonate;    Radio frequency magnetron sputtering;    Standard materials;    Thickness of the film;    [6 ,6]-phenyl-C61-butyric acid methyl esters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/764/1/012022/pdf
DOI  :  10.1088/1742-6596/764/1/012022

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Thin films of molybdenum oxide were deposited by radio frequency (RF) magnetron sputtering in Ar from a MoO3target at different deposition power on glass and silicon substrates. The thickness of the films was determined by profilometer measurements and by ellipsometry. The films were annealed in air at temperatures between 200 and 400°C in air. The optical transmission and reflection spectra were measured. The conductivity of the as deposited and annealed films was determined. The crystal structure was probed by Raman spectroscopy. The oxidation state of the surface was studied by X-ray photoelectron spectroscopy (XPS) spectroscopy. The deposition technique described above was used to experiment with MoOx as a hole transport layer (HTL) in polymer solar cells with bulk hetrojunction active layer, deposited by spin coating. The performance of these layers was compared with poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), which is the standard material used in this role. The measured current-voltage characteristics of solar cells with the structure glass/ITO/HTL/Poly(3-hexyl)thiophene (P3HT):[6,6]-phenyl-C61- butyric acid methyl ester (PCBM)/Al demonstrate that the studied MoOx layer is a good HTL and leads to comparable characteristics to those with PEDOT:PSS. On the other hand the deposition by magnetron sputtering guarantees reliable and repeatable HTLs.