Charge Transmission and Recombination in the Dye-Sensitized Solar Cells Based on Mn-Doped TiO2 Thin Films

2012 ◽  
Vol 519 ◽  
pp. 53-56
Author(s):  
Qiu Ping Liu ◽  
Yang Zhou ◽  
Hui Juan Huang ◽  
Quan Jiang Guo ◽  
Xian Hui Zhao ◽  
...  
Keyword(s):  
Thin Film ◽  
Photoelectron Spectroscopy ◽  
Dye Sensitized Solar Cells ◽  
Oxide Glass ◽  
Doped Tio2 ◽  
X Ray ◽  
Dye Sensitized ◽  
Photovoltaic Efficiency ◽  
Sensitized Solar Cells ◽  
Mn Doped

Abstract:Mn salts[MnSO4]-doped TiO2 electrodes thin film was synthesized by the hydrothermal method. To prepare the working electrode, The TiO2 or Mn-doped TiO2 slurry was coated onto the fluorine-doped tin oxide glass substrate by the doctor blade method and was then sintered at 450 °C. X-ray photoelectron spectroscopy (XPS) data indicated that the doped Mn ions exist in forms of Mn7+. This study show a photovoltaic efficiency of 5.15%, which is higher than that of the undoped TiO2 thin film (4.14%) and increase photovoltage and fill factors by 13.2% from 455 mV to 515mV, 39.3% from 499 to 695 respectively.

scholarly journals Synthesis and Characterizations of LaMnO3 Perovskite Powders Using Sol-Gel Method 

2021 ◽  
Author(s):  
Deniz ÇOBAN ÖZKAN ◽  
Ahmet Türk ◽  
Erdal Celik
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Dye Sensitized Solar Cells ◽  
Ammonium Hydroxide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Gel Technique ◽  
Sensitized Solar Cells

Abstract The present research demonstrates the synthesis and characterization of LaMnO3 perovskite powders using the sol-gel technique for dye-sensitive solar cell applications. With this respect, transparent solutions were prepared from La and Mn based precursors, distilled water and citric acid monohydrate. Ammonium hydroxide was incorporated into the La-Mn solution in order to neutralize/precipitate at 24oC for 1 hour in the air. The solution was allowed to evaporate on a hot plate device at 90 °C in the air. The obtained solutions were dried at 90 oC for 24 hours to form a xerogel structure, dried at 200 oC for 2 hours and consequently annealed at 500 and 850 oC for 2 hours in the air. Thermal, structural, microstructural, optical and magnetic properties of the powders were characterized through differential thermal analysis-thermogravimetry (DTA-TG), Fourier transform infrared (FTIR), X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), scanning electron microscopy (SEM), Malvern zeta sizer (PSD), UV-vis spectrometer and vibrating sample magnetometer (VSM). The obtained results indicate promise, especially the low band range, that LaMnO3 powders can be used in dye-sensitized solar cells and can positively affect performance and efficiency.

scholarly journals Influence of Tin Doped TiO2 Nanorods on Dye Sensitized Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6282
Author(s):  
Sandeep B. Wategaonkar ◽  
Vinayak G. Parale ◽  
Sawanta S. Mali ◽  
Chang-Kook Hong ◽  
Rani P. Pawar ◽  
...  
Keyword(s):  
Thin Films ◽  
Photoelectron Spectroscopy ◽  
Dye Sensitized Solar Cells ◽  
Rutile Phase ◽  
Tio2 Thin Films ◽  
Doped Tio2 ◽  
X Ray ◽  
Dye Sensitized ◽  
The One ◽  
Energy Conversion Devices

The one-step hydrothermal method was used to synthesize Sn-doped TiO2 (Sn-TiO2) thin films, in which the variation in Sn content ranged from 0 to 7-wt % and, further, its influence on the performance of a dye-sensitized solar cell (DSSC) photoanode was studied. The deposited samples were analyzed by X-ray diffraction (XRD) and Raman spectroscopy, which confirmed the existence of the rutile phase of the synthesized samples with crystallite size ranges in between 20.1 to 22.3 nm. In addition, the bare and Sn-TiO2 thin films showed nanorod morphology. A reduction in the optical band gap from 2.78 to 2.62 eV was observed with increasing Sn content. The X-ray photoelectron spectroscopy (XPS) analysis confirmed Sn4+ was successfully replaced at the Ti4+ site. The 3-wt % Sn-TiO2 based DSSC showed the optimum efficiency of 4.01%, which was superior to 0.87% of bare and other doping concentrations of Sn-TiO2 based DSSCs. The present work reflects Sn-TiO2 as an advancing material with excellent capabilities, which can be used in photovoltaic energy conversion devices.

Production and characterization of TiO2 nanoparticle thin films for its application in DSSCs

2020 ◽  
Vol 117 (6) ◽  
pp. 622
Author(s):  
Saranyoo Chaiwichian ◽  
Sumneang Lunput
Keyword(s):  
Thin Films ◽  
Dye Sensitized Solar Cells ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
Dye Sensitized ◽  
Photovoltaic Efficiency ◽  
Transmission Electron ◽  
Sensitized Solar Cells

In this research, TiO2 nanoparticle thin films were successfully prepared on FTO glass substrates through a doctor blade technique, and its application was tested in dye-sensitized solar cells (DSSCs) with different sensitizing dyes such as methylene blue (MB) and methyl orange (MO). The physicochemical properties of intended thin films were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and UV-vis diffuse reflectance spectra (UV-vis DRS) techniques. The experimental results revealed that dipped TiO2 nanoparticle thin films into MB dye solution showed a higher photovoltaic efficiency (1.45%) when compared with the MO dye solution. A reasonable mechanism of DSSCs was also proposed.

scholarly journals Efficient Dye-Sensitized Solar Cells Composed of Nanostructural ZnO Doped with Ti

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 273 ◽  
Author(s):  
Mati Rahman ◽  
Mingdeng Wei ◽  
Fengyan Xie ◽  
Matiullah Khan
Keyword(s):  
Solar Cells ◽  
Surface Area ◽  
Photoelectron Spectroscopy ◽  
High Surface ◽  
Dye Sensitized Solar Cells ◽  
Solar Cell Performance ◽  
X Ray ◽  
Dye Sensitized ◽  
Dye Loading ◽  
Sensitized Solar Cells

Photoanode materials with optimized particle sizes, excellent surface area and dye loading capability are preferred in good-performance dye sensitized solar cells. Herein, we report on an efficient dye-sensitized mesoporous photoanode of Ti doped zinc oxide (Ti-ZnO) through a facile hydrothermal method. The crystallinity, morphology, surface area, optical and electrochemical properties of the Ti-ZnO were investigated using X-ray photoelectron spectroscopy, transmission electron microscopy and X-ray diffraction. It was observed that Ti-ZnO nanoparticles with a high surface area of 131.85 m2 g−1 and a controlled band gap, exhibited considerably increased light harvesting efficiency, dye loading capability, and achieved comparable solar cell performance at a typical nanocrystalline ZnO photoanode.

scholarly journals Pt/Mesoporous Carbon Counter Electrode with a Low Pt Loading for High-Efficient Dye-Sensitized Solar Cells

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Guiqiang Wang ◽  
Junfeng Gu ◽  
Shuping Zhuo
Keyword(s):  
Solar Cells ◽  
Mesoporous Carbon ◽  
Counter Electrode ◽  
Dye Sensitized Solar Cells ◽  
Oxide Glass ◽  
X Ray ◽  
Dye Sensitized ◽  
High Efficient ◽  
Low Pt Loading ◽  
Sensitized Solar Cells

Pt/Mesoporous carbon counter electrodes with a low Pt loading for dye-sensitized solar cells were fabricated by coating Pt/mesoporous carbon on fluorine-doped tin oxide glass. Pt/mesoporous carbon samples were prepared by reducingH2PtCl6withNaBH4in mesoporous carbon and characterized byN2adsorption analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The Pt particles deposited on mesoporous carbon support were found to be in uniform shape and narrow range of particle size. Low-Pt-loading Pt/mesoporous carbon counter electrode showed a high electrocatalytic activity for triiodide reduction. Electrochemical impedance spectroscopy measurement displayed a low charge-transfer resistance of 1.2 Ωcm2for 1-Pt/mesoporous carbon counter electrode. Dye-sensitized solar cells based on the 1-Pt/mesoporous carbon counter electrode achieved an overall conversion efficiency of 6.62% under one sun illumination, which is higher than that of the cell with the conventional Pt counter electrode.

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