Influence of Synthesis Temperature on the Properties of SnO2 Thin Films via Hydrothermal Precipitation Method

2018 ◽  
Vol 281 ◽  
pp. 699-704
Author(s):  
Yue Liu ◽  
Jia Zhang ◽  
Cai Liang Pang ◽  
Zong Li Wang ◽  
Jin Shi Li ◽  
...  
Keyword(s):  
Tin Dioxide ◽  
Film Growth ◽  
Synthesis Temperature ◽  
Treatment Temperature ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Hydrothermal Temperature ◽  
Conductive Glass

To provide reference for optimizing the photoelectric conversion efficiency, we studied the effects of salt–alkali molar ratio on the properties of tin oxide nanofilms. We found that when the hydrothermal temperature was increased to 80 °C, the film growth was not complete. With a hydrothermal temperature of 120 °C, the film became more complete and structured. However, at 160 °C, thick and very irregular tin dioxide (SnO2) crystal particles were deposited on the FTO conductive glass surface. With the increase in heat treatment temperature, crystallization became more and more dense and complete. At 80 °C hydrothermal temperature, the simulated peak of the surface and number of peaks became smaller. However, they significantly increased with a hydrothermal temperature of 120 °C. When the hydrothermal temperature was at 160 °C, the surface simulated peak increased, but the number of peaks decreased. Moreover, the diameter of each peak was greatly increased. The film obtained via the hydrothermal method was relatively pure, and Sn(OH)3 was not completely converted into SnO2.

Influence of the Mole Ratio of Salt to Alkali on the Surface Structure of SnO2 Thin Film

2018 ◽  
Vol 279 ◽  
pp. 192-196
Author(s):  
Yue Liu ◽  
Ge Xiong ◽  
Yan Yang ◽  
Long He ◽  
Mei Hua Chen ◽  
...  
Keyword(s):  
Oxide Film ◽  
Tin Oxide ◽  
Molar Ratio ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Bonding Force ◽  
Conductive Glass ◽  
Film Forming ◽  
Conversion Performance ◽  
Macroscopic Analysis

This work investigated the effects of molar ratio of salt to alkali on the properties of tin oxide nanofilms to provide reference for optimizing its photoelectric conversion efficiency. The tin oxide film grown by hydrothermal method exhibited poor film-forming property. The macroscopic analysis revealed the formation of a thick film. The bonding force to the FTO substrate was poor, its brittle, and easy to fall off. When the molar ratio of salt to alkali was 1:8, the tin oxide film exhibited improved microstructure and large specific surface area, which could benefit electron transport. Moreover, the film showed excellent photoelectric conversion performance. However, mechanical properties, such as adhesion between the tin oxide film and the conductive glass FTO, remain to be improved.

Preparation and Optical Properties of TiO2 Film with a Nest-Like Structure by Three Times of Circulating Hydrothermal Method

NANO ◽  
2016 ◽  
Vol 11 (06) ◽  
pp. 1650066 ◽  
Author(s):  
Quangui He ◽  
Jia Zhuang ◽  
Qiuxiang Wen ◽  
Yang Deng ◽  
Jun Yu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Hydrothermal Method ◽  
Three Dimensional ◽  
Dye Adsorption ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Facile Hydrothermal Method ◽  
Conductive Glass ◽  
Photoelectric Properties ◽  
Adsorption Amount

An anatase TiO2 photoanode with a novel three-dimensional nest-like structure was prepared directly on a transparent conductive glass substrate through hydrothermal cycles by three times. First, an unidirectional banded structure film was prepared by a facile hydrothermal method. And then, with the time of hydrothermal cycle increased, part of nanobelts were ruptured into a lot of small polyhedrons, but they still maintained a trend of the previous connection, and some fine nanobelts were interweaved in small polyhedrons. Finally, we successfully prepared a film with a novel 3D nest-like structure, and it had all the characteristics of the hierarchitectures. It had better photoelectric properties than the film with fewer times of hydrothermal cycle. Its photoelectric conversion efficiency reached 3.81%, which is due to a large dye adsorption amount, rapid electronic transmission, and superior light scattering and more electrons transmission paths.

Study on Properties of Dye-Sensitized TiO2 Films

2012 ◽  
Vol 602-604 ◽  
pp. 1492-1496
Author(s):  
Wei Cong ◽  
Jiang Li ◽  
En Xiang Han
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Tetrabutyl Titanate ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Hydrothermal Temperature ◽  
Dye Sensitized ◽  
Photoelectric Properties ◽  
Titania Films

TiO2nanoporous thin films were fabricated by the hydrothermal method using tetrabutyl titanate as the precursor and used to assemble dye-sensitized solar cells. The properties which include the short-circuit photocurrent(ISC),open-circuit voltage(VOC) and the fill factor(FF)of the solar cells were tested. The microstructure of titania films were modulated by changing the hydrothermal reaction temperature and the amount of PEG and the influence on the properties of the solar cells by titania films weas studied. The results indicate that there are better photoelectric properties for TiO2films at the hydrothermal temperature fo 230°C and the additive amount of PEG being 5% of the mass of TiO2. ISC,VOCand FF was 12.42mA, 681mV, and 0.52 respectively, the photoelectric conversion efficiency(η)was 4.37%．

scholarly journals Influence of molar ratio of MAI and PbI2 on synthesis of perovskite film

2021 ◽  
Author(s):  
Tung-Lung Wu ◽  
Jenn-Kai Tsai ◽  
Ya-Zhu Song ◽  
Meng-Xiu Chen ◽  
Tian-Chiuan Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Molar Concentration ◽  
Molar Ratio ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Molar Ratios ◽  
Furnace Tube ◽  
Synthetic Solution ◽  
Low Humidity

This study explores the influence of molar ratio of the synthetic solution of methylammonium iodide (MAI) and PbI2 on perovskite solar cells. The complete perovskite crystals must be produced in a low-humidity environment. The substrate is spin-coated in the adjusted MAPbI3 synthesis solution and annealed by using a nitrogen furnace tube to form perovskite crystals. During the crystallization of MAPbI3, some of the PbI2 remains, which improves the efficiency of the perovskite solar cell. Therefore, we adjust the molar concentration of MAI to find the appropriate amount of the PbI2 residual. We fix the MAI molar concentration at 1 M and adjust the PbI2 molar concentration from 0.8 M to 1.4 M. The molar ratios of MAI and PbI2 are, then, 1:0.8, 1:1, 1:1.2, and 1:1.4, respectively. Then, we use UV–vis, FE-SEM, and photoelectric conversion efficiency (PCE) measurements for comparing the growth of perovskite crystals and their photoelectric characteristics. The results show that 1.2 M of PbI2 is the most appropriate concentration for perovskite solar cells among the adjusted concentrations.

scholarly journals Preparation of ZnO/Bi2O3 Composites as Heterogeneous Thin Film Materials with High Photoelectric Performance on FTO Base

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1140
Author(s):  
Yuhan Nie ◽  
Yadong Xie ◽  
Ying Zheng ◽  
Yao Luo ◽  
Jianguo Zhang ◽  
...  
Keyword(s):  
Energy Gap ◽  
Heterogeneous Material ◽  
Nanorod Array ◽  
Film Structure ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Bismuth Trioxide ◽  
Energy Applications ◽  
Conductive Glass ◽  
Conversion Performance

In recent years, ZnO nanomaterials have achieved great performance in solar energy applications. How to synthesize a ZnO nanocomposite structure with high photoelectric conversion efficiency has become an urgent problem to solved. In this paper, a narrow band gap bismuth trioxide (Bi2O3) coated on a ZnO nanoarray by magnetron sputtering was used to prepare a composite heterojunction ZnO/Bi2O3. Studies have found that ZnO/Bi2O3 exhibits excellent photoelectric conversion performance. By preparing a composite heterostructure of ZnO/Bi2O3, it can effectively compensate for the insufficient absorption of ZnO in the visible light range and inhibit the recombination of carriers within the material. The influence of Bi2O3 thickness on the microstructure and electronic structure of the ZnO/Bi2O3 composite structure was explored and analyzed. The energy gap width of the composite heterostructure decreases with the increase in the Bi2O3 thickness on the surface of the ZnO nanorod array. At the same time, the conductive glass composite film structure is simple to prepare and is very environmentally friendly. The ZnO/Bi2O3 composite heterogeneous material prepared this time is suitable for solar cells, photodetectors, photocatalysis and other fields.

Low-Temperature Processed TiO2 Nanoparticle Layer with Inorganic Binder for Perovskite Solar Cell

2020 ◽  
Vol 12 (2) ◽  
pp. 276-281
Author(s):  
Seulki Cho ◽  
Jihun Jang ◽  
Mansik Jo ◽  
Sang-Woo Song ◽  
Suyeol Jang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Titanium Isopropoxide ◽  
Molar Ratio ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Inorganic Binder

In this study, we report on the low-temperature (<120 °C) fabrication of a mesoporous titanium dioxide (TiO2) layer for use in perovskite solar cells. The TiO2 layer used was produced from a solution of TiO2 nanoparticles, purified water and titanium isopropoxide (TTIP) acting as a precursor of an inorganic binder network. We compared the properties of TiO2 layers resulting from different molar ratios (ranging from 0.1:1∼0.5:1) of titanium isopropoxide to TiO2 nanoparticles. Finally, perovskite solar cells were fabricated based on our optimized TiO2 molar ratio (TTIP:TiO2 = 0.1:1) and found to exhibit a short-circuit current density of ∼16.01 mA cm–2 and photoelectric conversion efficiency of ∼5.57%, respectively.

Preparation of Nanosize Anatase TiO2 by a Simple, Low-Cost Method and their Performance in Dye Sensitized Solar Cells

2011 ◽  
Vol 415-417 ◽  
pp. 1764-1768
Author(s):  
Lin Liu ◽  
Xiao Peng ◽  
Xiang Mei Yu ◽  
Ya Qing Feng
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Nano Particles ◽  
Molar Ratio ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The critical material of photo-anode, the TiO2nano-particles, as the most important component in dye sensitized solar cells (DSSCs) was studied in this paper. The TiO2nanoparticles were prepared by the method of micro-emulsion. In the process of preparation, the factors including the kinds of surfactant, and the molar ratio of water to titanium (R value) were investigated. Finally, the optimal condition for the preparation of the TiO2nano-particles was determined. When Tx-100 was used as the surfactant and R was 35, the TiO2nano-particles were prepared and used as photo-anode in the DSSCs, which were sensitized by N719, test under AM1.5G sunlight. The highest photoelectric conversion efficiency was achieved: Short-circuit photocurrent (Isc) =13.91mA/cm2, open-circuit photo voltage (Voc) =0.83V, fill factor (FF) =55.06%, photoelectric conversion efficiency (η) =6.36%.

Synthesis and Characterization of Spinel-Type NiCr2O4 Nanocrystalline

2012 ◽  
Vol 512-515 ◽  
pp. 86-90 ◽  
Author(s):  
Zhi Qiang Hu ◽  
Xian Qing Liu ◽  
De Feng Huang ◽  
Hong Gao ◽  
Jing Xiao Liu
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Short Circuit ◽  
Synthesis Temperature ◽  
Open Circuit ◽  
Photoelectric Conversion Efficiency ◽  
Doping Amount ◽  
Photoelectric Conversion ◽  
Spinel Type ◽  
Dye Sensitized

In this article, spinel–type NiCr2O4 Nanocrystalline were prepared by the citrate method. After doping it into P25 (degussa, TiO2), NiCr2O4/TiO2 thin film photoanode were prepared by screen printing process on the surface of Fluorine Tin Oxide (FTO) Glass. And then they were assembled into Dye sensitized TiO2 Nanocrystalline solar cells (DSSC). The as–prepared NiCr2O4 powders were characterized by differential thermal analysis/thermo gravimetry (DTA/TG), X–ray diffraction (XRD) and ultraviolet visible (Uv–Vis) diffuse spectra. The properties of the solar cells were investigated by Solar Simular and Keithley Sourcemeter, respectively. The results showed that the grain size of the NiCr2O4 particles obtained at optimum synthesis temperature (1000 °C) was about 40.23 nm and the band gap was 1.8ev. The cell properties increased when the doping amount of NiCr2O4 was 1wt%. The open–circuit voltage (Voc) of Dye Sensitized TiO2 Nanocrystalline Solar Cell was from 0.71V up to 0.73V, The short–circuit photocurrent (Jsc) of DSSC increased from 5.21mA·cm-2 to 6.95mA·cm-2. The photoelectric conversion efficiency (η) was from 2.40% up to 3.14%, which was 30.8% higher than the pure TiO2 thin film photoanode.

POTENTIAL EVALUATION OF YELLOW COTTON (COCHLOSPERMUM REGIUM) PIGMENTS FOR DYE SENSITIZED SOLAR CELLS APPLICATION

2020 ◽  
pp. 16-21
Author(s):  
PHITCHAPHORN KHAMMEE ◽  
YUWALEE UNPAPROM ◽  
UBONWAN SUBHASAEN ◽  
RAMESHPRABU RAMARAJ
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Plant Materials ◽  
Natural Pigments ◽  
Dye Sensitized ◽  
Study Results ◽  
Sensitized Solar Cells

Recently, dye-sensitized solar cells (DSSC) have concerned significant attention attributable to their material preparation process, architectural and environmental compatibility, also low cost and effective photoelectric conversion efficiency. Therefore, this study aimed to use potential plant materials for DSSC. This research presents the extraction of natural pigments from yellow cotton flowers (Cochlospermum regium). In addition, the natural pigments were revealed that outstanding advantages, including a wide absorption range (visible light), easy extraction method, safe, innocuous pigments, inexpensive, complete biodegradation and ecofriendly. Methanol was used as a solvent extraction for the yellow cotton flower. The chlorophylls and carotenoid pigments extractions were estimated by a UV-visible spectrometer. The chlorophyll-a, chlorophyll-b, and carotenoid yield were 0.719±0.061 µg/ml, 1.484±0.107 µg/ml and 7.743±0.141 µg/ml, respectively. Thus, this study results suggested that yellow cotton flowers containing reasonable amounts appealable in the DSSC production.

Interfacial self-assembly engineering for constructing a 2D flexible superlattice polyoxometalate/rGO heterojunction for high-performance photovoltaic devices

2020 ◽  
Vol 49 (12) ◽  
pp. 3766-3774 ◽  
Author(s):  
Jianping Li ◽  
Dai Wu ◽  
Chunlei Wang ◽  
Ding Liu ◽  
Weilin Chen ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Self Assembly ◽  
High Performance ◽  
Photoelectric Conversion Efficiency ◽  
Photovoltaic Devices ◽  
Photoelectric Conversion

The strategy of constructing a 2D flexible superlattice polyoxometalate/rGO heterojunction is proposed to improve the photoelectric conversion efficiency of photovoltaic devices.

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