Effect of ZnO Seed Layer and TiO2 Coating Treatments on Aligned TiO2/ZnO Nanostructures for Dye-Sensitized Solar Cells

2013 ◽  
Vol 479-480 ◽  
pp. 69-74
Author(s):  
Lung Chuan Chen ◽  
Jean Hong Chen ◽  
Shuei Feng Tsai ◽  
Guan Wen Wang
Keyword(s):  
Solar Cells ◽  
Seed Layer ◽  
Zno Nanorods ◽  
Dye Sensitized Solar Cells ◽  
Atomic Ratio ◽  
Band Gap Energy ◽  
Zno Nanostructures ◽  
Dye Sensitized ◽  
Cbd Method ◽  
Sensitized Solar Cells

A chemical bath deposition (CBD) method was applied to grow zinc oxide nanorod arrays on transparent conductive oxides acting as templates for the synthesis of TiO2/ZnO nanostructures (TiO2/ZNR) followed by HCl etching, and then these nanostructures were assembled as anodes in dye-sensitized solar cells. The ZnO nanorods, predominantly grew with good crystallinity along c-axis, exhibit wurtzite structure with smooth surface. Etching of the TiO2/ZNR by HCl changes the most preferential crystal plane of ZnO from (002) to (100) and significantly increases the atomic ratio of Ti/Zn. Optical absorption measurements indicate a band gap energy of 3.1 eV for ZNR and TiO2/ZNR. Increasing the spin coating time (SCT) of TiO2on ZNR increases the PL intensity. The seed layer number (SLN) of ZnO exerts moderate influence on the photo-to-electricity conversion and an optimum SLN was observed for this study.

scholarly journals ZnO-CuO core-shell heterostructure for improving the efficiency of ZnO-based dye-sensitized solar cells

MRS Advances ◽  
2017 ◽  
Vol 2 (15) ◽  
pp. 857-862 ◽  
Author(s):  
Kichang Jung ◽  
Taehoon Lim ◽  
Yaqiong Li ◽  
Alfredo A. Martinez-Morales
Keyword(s):  
Solar Cells ◽  
Thermal Oxidation ◽  
Conversion Efficiency ◽  
Seed Layer ◽  
Near Infrared ◽  
Zno Nanorods ◽  
Dye Sensitized Solar Cells ◽  
Core Shell ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

ABSTRACTIn this work, the integration of ZnO-CuO core-shell nanostructures shows improvement in the conversion efficiency of ZnO-based dye-sensitized solar cells (DSSCs). This is due to CuO acting as a secondary absorption layer that allows the absorption of near-infrared (NIR) light increasing the generated photocurrent in the device, and as a blocking layer that reduces electron-hole recombination. The ZnO core and encapsulating CuO shell are synthesized through chemical vapor deposition (CVD), and thermal oxidation of a Cu seed layer, respectively. The crystallinity of the synthesized ZnO and CuO is analyzed by X-ray diffraction (XRD). Scanning electron microscope (SEM) images show the change in morphology through the steps of Cu seed layer deposition and thermal oxidation of this layer. To determine optical properties of CuO on ZnO nanorods, UV-Vis-NIR photospectrocopy is used. The comparison of conversion efficiency of DSSCs using two different photoelectrodes (i.e. ZnO nanorods versus ZnO-CuO core-shell nanostructure) is performed by I-V measurements.

Effect of seed layer on the performance of ZnO nanorods-based photoanodes for dye-sensitized solar cells

2019 ◽  
Vol 6 (10) ◽  
pp. 105523 ◽  
Author(s):  
Nadia Shahzad ◽  
Zamarrud Shah ◽  
Muhammad Imran Shahzad ◽  
Kashan Ahmad ◽  
Diego Pugliese
Keyword(s):  
Solar Cells ◽  
Seed Layer ◽  
Zno Nanorods ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Photovoltaic Characterization of Dye-sensitized Solar Cells with Natural Dyes using Synthesized ZnO nanostructures

2013 ◽  
Vol 30 ◽  
pp. 56-61 ◽  
Author(s):  
I. B. Karki ◽  
S. Chatterjee ◽  
J. J. Nakarmi ◽  
D. Sinha ◽  
D. Goswami ◽  
...  
Keyword(s):  
Solar Cells ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Dye Sensitized Solar Cells ◽  
Natural Dyes ◽  
Zno Nanostructures ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Considerable attention was created over the past decade on Dye-sensitized solar cells (DSSCs) as a viable alternate technology for renewable energy. Much attention was attracted due to their high efficiencies and potentially low production costs. In this paper, DSSCs with natural dyes were successfully synthesized using ZnO nanostructures. ZnO nanorods were grown on an ITO coated glass using sol-gel method and used to fabricate DSSCs using natural dyes and liquid potassium iodide (KI3) electrolyte. Different natural dye were analyzed for its suitability to be used in DSSC and subsequently used to fabricate the cell. Finally the photovoltaic properties of the ZnO based DSSC samples were systematically analyzed. Roles of new sensitizer dye were investigated and the results were compared. The ZnO nanorods grown by the sol-gel method have more uniform thickness. The DSSC structure with Carbon counter electrode yields an open circuit voltage markedly higher from DSSC on an ITO glass and has energy conversion efficiency less than 2%.DOI: http://dx.doi.org/10.3126/jncs.v30i0.9336Journal of Nepal Chemical Society Vol. 30, 2012 Page: 56-62 Uploaded date: 12/16/2013 

Role of Pristine and Acid-Functionalized Fullerene on Breaking Dye Aggregates and its Impact on the Efficiency of Solar Cells

2014 ◽  
Vol 67 (5) ◽  
pp. 819
Author(s):  
Syed Mujtaba Shah ◽  
Zafar Iqbal ◽  
Muzaffar Iqbal ◽  
Naila Shahzad ◽  
Amina Hana ◽  
...  
Keyword(s):  
Solar Cells ◽  
Zno Nanoparticles ◽  
Self Assembly ◽  
Zno Nanorods ◽  
Active Material ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Transmission Electron ◽  
Sensitized Solar Cells

Porphyrin dyes have an inherent tendency to aggregate. This leads to a self-quenching phenomenon that hinders electron transfer to the conduction band of semiconductors in dye-sensitized solar cells. Self-quenching adversely affects the efficiency of solar cells. Here, we report the interaction of porphyrin with pristine and acid-functionalized fullerene molecules on the surface of ZnO nanoparticles under chemisorbed conditions. Chemisorption of porphyrin only on ZnO nanoparticles instigates aggregation of the porphyrin molecules. These aggregates can be effectively broken by chemisorbing fullerene molecules on the surface of the ZnO nanoparticles. This is due to self-assembly formation processes because of porphyrin–fullerene interactions. The nanohybrid material, consisting of ZnO nanorods, acid-functionalized porphyrin, and fullerene derivatives, was characterized by UV–visible spectroscopy, fourier transform infrared spectroscopy, fluorescence spectroscopy, and transmission electron microscopy. The material generates better performing dye-sensitized solar cells when compared with those fabricated from porphyrin-based photo-active material.

Evolution of ZnO nanostructures as hexagonal disk: Implementation as photoanode material and efficiency enhancement in Al: ZnO based dye sensitized solar cells

2019 ◽  
Vol 470 ◽  
pp. 1130-1138 ◽  
Author(s):  
Mohammad Ramzan Parra ◽  
Padmini Pandey ◽  
Hafsa Siddiqui ◽  
Vediappan Sudhakar ◽  
Kothandam Krishnamoorthy ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Zno Nanostructures ◽  
Efficiency Enhancement ◽  
Dye Sensitized ◽  
Sensitized Solar Cells
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