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.

scholarly journals Application of Diaminium Iodides in Binary Ionic Liquid Electrolytes for Dye-Sensitized Solar Cells

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Yanzhen Yang ◽  
Renjie Sun ◽  
Chengwu Shi ◽  
Yucheng Wu ◽  
Mei Xia
Keyword(s):  
Ionic Liquid ◽  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

N-(2-hydroxyethyl)ethylenediaminium iodides (HEEDAIs) and N-(2-hydroxyethyl)piperazinium iodides (HEPIs) were synthesized, and their thermal properties were analysed. The influence of HEEDAI and HEPI onI3-/I-redox behavior in binary ionic liquid was investigated. The result revealed that HEEDAI can suppress the recombination betweenI3-and the injected electrons in TiO2conduction band and be used as the alternative of 4-tert-butylpyridine in the electrolyte of dye-sensitized solar cells. The electrolyte C, 0.15 mol⋅L−1I2, HEEDAI and MPII with mass ratio of 1 : 4, gave the short-circuit photocurrent density of 9.36 mA⋅cm−2, open-circuit photovoltage of 0.67 V, fill factor of 0.52, and the corresponding photoelectric conversion efficiency of 3.24% at the illumination (air mass 1.5, 100 mW⋅cm−2, active area 0.25 cm2).

Fabrication of ZnO Nanospheres and Application to Dye-Sensitized Solar Cells

2012 ◽  
Vol 512-515 ◽  
pp. 1545-1548
Author(s):  
Yan Xiang Wang ◽  
Bing Xin Zhao ◽  
Jian Sun
Keyword(s):  
Solar Cells ◽  
Reaction Time ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this paper, pure ZnO nanospheres and IO3- ions doped ZnO nanospheres were prepared by heating under reflux with zinc acetate and diethylene glycol as raw materials, and the ZnO dye-sensitized solar cells (DSCs) were prepared. The influences of reaction time and IO3--ions dope on ZnO properties were studied. DSCs properties prepared with obtained ZnO nanospheres were investied. ZnO nanospheres were characterized by XRD, SEM and infrared absorption spectrogram. The results showed that when the temperature was 160°C, ZnO nanospheres with diameter 100-800nm were obtained. When reaction time was 2h, ZnO diameter was about 500nm. When the reaction time was 24h, the diameter of ZnO was about 800nm with wider distribution. The ZnO DSCs were prepared by using ZnO nanopowders with different reaction time as photoanode. The photoelectric conversion efficiency of 24h-ZnO DSCs was the highest. The photoelectric conversion efficiency, open circuit voltage, short-circuit current and fill factor were 2.15%, 0.64V, 6.47 mA•cm-2, 0.52, respectively.

scholarly journals Dye-Sensitized Nanocrystalline ZnO Solar Cells Based on Ruthenium(II) Phendione Complexes

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Hashem Shahroosvand ◽  
Parisa Abbasi ◽  
Mohsen Ameri ◽  
Mohammad Reza Riahi Dehkordi
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Zno Thin Film ◽  
Photovoltaic Properties ◽  
Dye Sensitized ◽  
Ft Ir

The metal complexes ( (phen)2(phendione))(PF6)2(1), [ (phen)(bpy)(phendione))(PF6)2(2), and ( (bpy)2(phendione))(PF6)2(3) (phen = 1,10-phenanthroline, bpy = 2,2′-bipyridine and phendione = 1,10-phenanthroline-5,6-dione) have been synthesized as photo sensitizers for ZnO semiconductor in solar cells. FT-IR and absorption spectra showed the favorable interfacial binding between the dye-molecules and ZnO surface. The surface analysis and size of adsorbed dye on nanostructure ZnO were further examined with AFM and SEM. The AFM images clearly show both, the outgrowth of the complexes which are adsorbed on ZnO thin film and the depression of ZnO thin film. We have studied photovoltaic properties of dye-sensitized nanocrystalline semiconductor solar cells based on Ru phendione complexes, which gave power conversion efficiency of (η) of 1.54% under the standard AM 1.5 irradiation (100 mW cm−2) with a short-circuit photocurrent density () of 3.42 mA cm−2, an open-circuit photovoltage () of 0.622 V, and a fill factor (ff) of 0.72. Monochromatic incident photon to current conversion efficiency was 38% at 485 nm.

scholarly journals Effects of Different Doping Ratio of Cu Doped CdS on QDSCs Performance

2015 ◽  
Vol 2015 ◽  
pp. 1-4
Author(s):  
Xiaojun Zhu ◽  
Xiaoping Zou ◽  
Hongquan Zhou
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Sensitized Solar Cells ◽  
Doping Ratio

We use the successive ionic layer adsorption and reaction (SILAR) method for the preparation of quantum dot sensitized solar cells, to improve the performance of solar cells by doping quantum dots. We tested the UV-Vis absorption spectrum of undoped CdS QDSCs and Cu doped CdS QDSCs with different doping ratios. The doping ratios of copper were 1 : 100, 1 : 500, and 1 : 1000, respectively. The experimental results show that, under the same SILAR cycle number, Cu doped CdS quantum dot sensitized solar cells have higher open circuit voltage, short circuit current density photoelectric conversion efficiency than undoped CdS quantum dots sensitized solar cells. Refinement of Cu doping ratio are 1 : 10, 1 : 100, 1 : 200, 1 : 500, and 1 : 1000. When the proportion of Cu and CdS is 1 : 10, all the parameters of the QDSCs reach the minimum value, and, with the decrease of the proportion, the short circuit current density, open circuit voltage, and the photoelectric conversion efficiency are all increased. When proportion is 1 : 500, all parameters reach the maximum values. While with further reduction of the doping ratio of Cu, the parameters of QDSCs have a decline tendency. The results showed that, in a certain range, the lower the doping ratio of Cu, the better the performance of quantum dot sensitized solar cell.

scholarly journals Cu-Doped-CdS/In-Doped-CdS Cosensitized Quantum Dot Solar Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Lin Li ◽  
Xiaoping Zou ◽  
Hongquan Zhou ◽  
Gongqing Teng
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Quantum Dot Solar Cells ◽  
Cds Quantum Dot

Cu-doped-CdS and In-doped-CdS cosensitized (Cu-doped-CdS/In-doped-CdS) quantum dot solar cells (QDSCs) are introduced here. Different cosensitized sequences, doping ratios, and the thickness (SILAR cycles) of Cu-doped-CdS and In-doped-CdS are discussed. Compared with undoped CdS QDSCs, the short circuit current density, UV-Vis absorption spectra, IPCE (monochromatic incident photon-to-electron conversion), open circuit voltage, and so on are all improved. The photoelectric conversion efficiency has obviously improved from 0.71% to 1.28%.

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%．

Preparation of ZnO Films with Different Morphologies and their Applications in Dye Sensitized Solar Cells

2012 ◽  
Vol 519 ◽  
pp. 70-73
Author(s):  
Yan Xiang Wang ◽  
Sun Jian ◽  
Bing Xin Zhao
Keyword(s):  
Fill Factor ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Zno Films ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The influences of ZnO photoanode structure on the properties of ZnO dye-sensitized solar cell were studied in this paper. Four kinds of ZnO photoanode films prepared from ZnO nanopowders, nanorods, nanosheets and aggregates were investigated. Their photovoltaic parameters were discussed and compared. ZnO cell consisted of ZnO aggregates had optimal properties, photoelectric conversion efficiency, open circuit voltage, short-circuit current and the fill factor of ZnO aggregates cells were 2.15%, 0.64V, 6.47mA•cm-2 and 0.52, respectively.

The Influence of NaOH Concentration on the Performance of ZnO by a Hydrothermal Process

2014 ◽  
Vol 521 ◽  
pp. 563-566
Author(s):  
Zong Hu Xiao ◽  
Shun Jian Xu ◽  
Yong Ping Luo ◽  
Yong Huang ◽  
Wei Zhong ◽  
...  
Keyword(s):  
Short Circuit ◽  
Hydrothermal Process ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Naoh Solution ◽  
Sensitized Solar Cells

Zinc oxide (ZnO) with various morphologies have been successfully prepared by a hydrothermal process from zinc acetate (Zn (CH3COO)2) and sodium hydroxide (NaOH) solution. The influence of NaOH concentration on the morphology of ZnO was investigated. And ZnO with various morphologies were applied in dye-sensitized solar cells (DSCs) as the photoelectrodes. Results show that thec-axis preferred growth of ZnO is becoming increasingly obvious with the increase of NaOH concentration. There are a lof of differences in the photovoltaic performances of DSCs, which are based on ZnO with various morphologies as the photoelectrodes. DSC consisted of ZnO nanoparticles has optimal performances, the corresponding short circuit photocurrent density (Jsc), open circuit voltage (Voc), fill factor (FF) and photoelectric conversion efficiency (η) are 3.97 mA/cm2, 0.653 V,0.59 and 1.52 %, respectively.

Investigation on Applying Compound Solvent in Liquid Electrolyte for Dye-Sensitized Solar Cells

2011 ◽  
Vol 347-353 ◽  
pp. 906-911
Author(s):  
Zhi Qiang Hu ◽  
De Feng Huang ◽  
Xian Qing Liu ◽  
Hong Gao ◽  
Hong Shun Hao
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Liquid Electrolyte ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Photoelectric Properties ◽  
Sensitized Solar Cells

Liquid electrolyte for dye-sensitized solar cells (DSSCs) was prepared by using the mixture of sulfolane and 3-methoxypropionitrile as a solvent, 4-tert-butylpyridine as an additive. The influences of sulfolane on electrolyte conductivity, photoelectric performances and the DSSCs stability were investigated. The results indicated that when the ratio of 3-methoxypropionitrile to sulfolane achieves 3:2, the cell showed the optimal photoelectric properties and stability, and the short-circuit current and photoelectric conversion efficiency achieved 7.58mA/cm2 and 2.79%, respectively.

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