scholarly journals INFLUENCE OF STRUCTURAL FEATURES OF ZNO FILMS ON OPTICAL AND PHOTOELECTRIC CHARACTERISTICS OF INVERTED POLYMER SOLAR ELEMENTS

2021 ◽  
Vol 18 (2) ◽  
pp. 40-46
Author(s):  
А.К. Zeinidenov ◽  
Keyword(s):  
Solar Cells ◽  
Zinc Acetate ◽  
Annealing Temperature ◽  
Charge Carriers ◽  
Zno Films ◽  
Acetate Solution ◽  
Photovoltaic Properties ◽  
Strong Light ◽  
Annealing Temperatures ◽  
Zinc Acetate Solution

In this work we investigated the effect of preliminary annealing of zinc acetate solution films on the morphology, structure, optical properties of the formed ZnO films and also on the photovoltaic properties of polymer solar cells based on the obtained ZnO films. It was found that the pre-annealing temperature significantly affects the morphology and structure of the obtained ZnO films. At pre-annealing temperatures below 200 oC the films have a strongly relief morphology (wrinkled morphology), while at pre-annealing temperatures above 200 oC the surface morphology of the films is smooth. The relief of ZnO films affects the photocurrent density of solar cells. Cells based on ZnO films with wrinkled morphology showed a higher photocurrent compared to smooth morphology, which is due to strong light scattering and, as a result, the optical path of light in the photoactive layer is increased due to multiple reflection of light in the wrinkled structure of ZnO. In addition, with increasing pre-annealing temperature, the photovoltage of solar cells and the rate of recombination of charge carriers increases, but the diffusion coefficient of charge carriers decreases, which indicates an increase in the density of defects in the crystal lattice of ZnO. Thus, it has been shown that smooth or highly relief thin ZnO films with controlled properties can be obtained from a zinc acetate solution.

scholarly journals Synthesis and structural properties of ZnO films grown by spray pyrolysis of zinc acetate solution

2010 ◽  
Vol 66 (a1) ◽  
pp. s158-s158 ◽  
Author(s):  
Nancy Castillo ◽  
Rodrigo Esparza ◽  
Jesus Velazquez ◽  
Agustin Conde Gallardo ◽  
Miguel Jose Yacaman
Keyword(s):  
Spray Pyrolysis ◽  
Structural Properties ◽  
Zinc Acetate ◽  
Zno Films ◽  
Acetate Solution ◽  
Zinc Acetate Solution

scholarly journals Fabrication of Cu2ZnSnS4 Thin Films from Ball-Milled Nanoparticle inks under Various Annealing Temperatures

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1615 ◽  
Author(s):  
Xianfeng Zhang ◽  
Engang Fu ◽  
Maoxi Zheng ◽  
Yuehui Wang
Keyword(s):  
Raman Spectrum ◽  
Grain Growth ◽  
Annealing Temperature ◽  
Secondary Phase ◽  
Atomic Ratio ◽  
Secondary Phases ◽  
Photovoltaic Properties ◽  
Annealing Temperatures ◽  
Milling Method ◽  
Nanocrystal Inks

Cu2ZnSnS4 (CZTS) has been recognized as a promising thin-film absorber material of chalcopyrite-related solar cells. A two-stage method for fabricating CZTS films using CZTS nanoparticles was developed. Nanocrystal inks fabricated by a ball-milling method was utilized to °C deposit CZTS precursors by spin-coating approach. The CZTS precursors were annealed in the sulfur atmosphere under different annealing temperatures ranging from 550 °C to 650 °C. Influences of annealing temperature on grain growth, composition, crystallinity, and photovoltaic properties of CZTS films were characterized. With the increase of annealing temperature, grain growth was enhanced, while the sulfur atomic ratio fist increased then decreased. The crystallinity of the films was significantly improved after the annealing, and the obvious peak of the secondary phase of ZnS, were observed from the X-ray diffraction results, when the annealing temperature increased to 625 °C. However, the secondary phase was not detected from the surface Raman spectrum. Through comparing the Raman spectrum of different areas of the CZTS film, secondary phases of ZnS and SnS were observed, indicating the decomposition of CZTS films, due to the high temperature. The highest conversion efficiency of 7.5% was obtained when the annealing temperature was 600 °C.

Synthesis of Flower-Like ZnO Films and Their Photovoltaic Properties for Dye-Sensitized Solar Cells

2014 ◽  
Vol 44 (1) ◽  
pp. 244-251 ◽  
Author(s):  
Linsen Zhang ◽  
Kai Jin ◽  
Suzhen Li ◽  
Lizhen Wang ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Zno Films ◽  
Photovoltaic Properties ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Effect of Annealing Temperature on CuInSe2/ZnS Thin-Film Solar Cells Fabricated by Using Electron Beam Evaporation

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
H. Abdullah ◽  
S. Habibi
Keyword(s):  
Electron Beam ◽  
Solar Cells ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Electron Beam Evaporation ◽  
Thin Film Solar Cells ◽  
X Ray ◽  
Annealing Temperatures ◽  
Pure Cu ◽  
Deposited Films

CuInSe2(CIS) thin films are successfully prepared by electron beam evaporation. Pure Cu, In, and Se powders were mixed and ground in a grinder and made into a pellet. The pallets were deposited via electron beam evaporation on FTO substrates and were varied by varying the annealing temperatures, at room temperature, 250°C, 300°C, and 350°C. Samples were analysed by X-ray diffractometry (XRD) for crystallinity and field-emission scanning electron microscopy (FESEM) for grain size and thickness. I-V measurements were used to measure the efficiency of the CuInSe2/ZnS solar cells. XRD results show that the crystallinity of the films improved as the temperature was increased. The temperature dependence of crystallinity indicates polycrystalline behaviour in the CuInSe2films with (1 1 1), (2 2 0)/(2 0 4), and (3 1 2)/(1 1 6) planes at 27°, 45°, and 53°, respectively. FESEM images show the homogeneity of the CuInSe2formed. I-V measurements indicated that higher annealing temperatures increase the efficiency of CuInSe2solar cells from approximately 0.99% for the as-deposited films to 1.12% for the annealed films. Hence, we can conclude that the overall cell performance is strongly dependent on the annealing temperature.

Fabrication of Nanostructured Zinc Oxide Films on Plastic Substrates by Pyrolysis Method and their Application to Dye-Sensitized Solar Cells

2013 ◽  
Vol 582 ◽  
pp. 206-209 ◽  
Author(s):  
Hirokazu Utsunomiya ◽  
Shintaro Ueno ◽  
Shinobu Fujihara
Keyword(s):  
Solar Cells ◽  
Zinc Acetate ◽  
Dye Sensitized Solar Cells ◽  
Hot Water ◽  
Zno Films ◽  
Polyethylene Naphthalate ◽  
Plastic Substrates ◽  
Dye Sensitized ◽  
Pyrolysis Method ◽  
Sensitized Solar Cells

t has been attempted to utilize plastic substrates for electrodes, instead of conventional glass substrates, to fabricate flexible, lightweight, and low-cost dye-sensitized solar cells (DSSCs). We examined a pyrolysis method by which preformed layered hydroxide zinc acetate (LHZA: Zn5(OH)8(CH3COO)2·2H2O) films were converted into ZnO films at temperatures below 120 oC. Since the pyrolyzed films still contained zinc acetate compounds, they were immersed in hot water aiming at removing such the impurities. This hot water treatment influenced the film morphology to a large extent. The energy conversion efficiency of 3.41% was obtained for the cell using an N719/ZnO electrode fabricated on an indium tin oxide-coated polyethylene naphthalate (ITO-PEN) substrate through the present pyrolysis method.

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