Application of ZnO Nanostructure by Hydrothermal Growth in Quantum Dot Sensitized Solar Cells

2014 ◽  
Vol 875-877 ◽  
pp. 1904-1907
Author(s):  
Bao Li Zhang ◽  
X.P. Zou ◽  
X.M. Lv ◽  
G.Q. Yang ◽  
C.L. Wei ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Short Circuit ◽  
Hydrothermal Growth ◽  
Photoelectric Conversion Efficiency ◽  
Flower Structure ◽  
Photoelectric Conversion ◽  
Nanostructure Materials ◽  
Zno Nanostructure ◽  
Sensitized Solar Cells

In this paper, we mainly talk about two kinds of ZnO nanostructure materials which are rod and flower structure by hydrothermal growth as photoanode of quantum dot sensitized solar cells (QDSSCs). Using chemical bath deposition to assemble CdS quantum dots onto ZnO nanostructure materials, and after different CBD cycles we could get the cell parameters of different CBD cycles respectively in their I-V curves, from which we could see it is the flower structure that has the highest efficiency which is 0.346% after 9 CBD cycles and the short-circuit current is 2.88 mA/cm2. Therefore, we could see that ZnO flower structure has a potential application in solar cell devices as the photoelectrode to gain higher photoelectric conversion efficiency (PCE).

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%.

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).

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.

H3PW12O40/Co3O4–Cu2S as a low-cost counter electrode catalyst for quantum dot-sensitized solar cells

2020 ◽  
Vol 44 (26) ◽  
pp. 11042-11048
Author(s):  
Yi Yang ◽  
Qiu Zhang ◽  
Fengyan Li ◽  
Zhinan Xia ◽  
Lin Xu
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Composite Film ◽  
Conversion Efficiency ◽  
Counter Electrode ◽  
Low Cost ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Electrocatalytic Performance ◽  
Sensitized Solar Cells

The PW12/Co3O4–Cu2S composite film shows excellent electrocatalytic performance and achieves a high photoelectric conversion efficiency of 4.67%, which is 46%, 55.6%, and 72%, respectively, higher than those of Cu2S, PW12/Co3O4 and Co3O4 CEs.

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 Incorporation of Mn 2+ into CdSe quantum dots by chemical bath co-deposition method for photovoltaic enhancement of quantum dot-sensitized solar cells

2018 ◽  
Vol 5 (3) ◽  
pp. 171712 ◽  
Author(s):  
Chenguang Zhang ◽  
Shaowen Liu ◽  
Xingwei Liu ◽  
Fei Deng ◽  
Yan Xiong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Electrochemical Impedance ◽  
Ion Source ◽  
Photoelectric Conversion Efficiency ◽  
Cdse Qds ◽  
Photoelectric Conversion ◽  
Simple Method ◽  
Sensitized Solar Cells

A photoelectric conversion efficiency (PCE) of 4.9% was obtained under 100 mW cm −2 illumination by quantum-dot-sensitized solar cells (QDSSCs) using a CdS/Mn : CdSe sensitizer. CdS quantum dots (QDs) were deposited on a TiO 2 mesoporous oxide film by successive ionic layer absorption and reaction. Mn 2+ doping into CdSe QDs is an innovative and simple method—chemical bath co-deposition, that is, mixing the Mn ion source with CdSe precursor solution for Mn : CdSe QD deposition. Compared with the CdS/CdSe sensitizer without Mn 2+ incorporation, the PCE was increased from 3.4% to 4.9%. The effects of Mn 2+ doping on the chemical, physical and photovoltaic properties of the QDSSCs were investigated by energy dispersive spectrometry, absorption spectroscopy, photocurrent density–voltage characteristics and electrochemical impedance spectroscopy. Mn-doped CdSe QDs in QDSSCs can obtain superior light absorption, faster electron transport and slower charge recombination than CdSe QDs.

scholarly journals Facile Synthesis of ZnO@TiO2Core-Shell Nanorod Thin Films for Dye-Sensitized Solar Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Xiaoxu Ji ◽  
Wumei Liu ◽  
Yumin Leng ◽  
Aihua Wang
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Core Shell ◽  
Mixed Solution ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

ZnO nanorod thin films grown on fluorine-doped tin oxide (FTO) glasses have been synthesized via facile thermal evaporation. To optimize the performance of dye-sensitized solar cells (DSSCs), we fabricated ZnO@TiO2core-shell composite by a simple dip-coating method immersed in the mixed solution of Ti(OC4H9) and ethanol. Results of solar cell testing showed that ZnO@TiO2core-shell nanorod thin films on FTO significantly increased open circuit voltage (from 0.47 V to 0.53 V), short circuit current (from 10.78 mA/cm2to 13.98 mA/cm2), and fill factor (from 51% to 55%). The photoelectric conversion efficiency (PEC) increased from 3.3% for bare ZnO DSSCs to 4.85% for ZnO@TiO2core-shell structured DSSCs. This is mainly ascribed to the improvement in light harvesting efficiency, electron transfer, and the effective suppression of charge recombination.

Properties and Optimization of Photoanode in Dye-Sensitized Solar Cells

2014 ◽  
Vol 602-603 ◽  
pp. 884-887
Author(s):  
Hui Xia Cao ◽  
Ze Zhou ◽  
Xiao Di Li ◽  
Bo Yu Wang ◽  
Yu Lin Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Photoelectric Conversion Efficiency ◽  
Process Conditions ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In order to improve the photoelectric conversion efficiency of dye-sensitized solar cells (DSSC), the photoanode process conditions were optimized in this work. The effects on photoelectric conversion efficiency of three methods were mainly investigated, including magnetron sputtering barrier layer, printing scattering layer and post-treatment with TiCl4. The microstructure of TiO2thin films was measured by scanning electron microscope (SEM). The results showed that porous photoanode benefited to electronic transmission. The photoelectric conversion efficiency and performance of DSSC were measured by I-V testing instrument. The results indicated that the short circuit current and photoelectric conversion efficiency were improved. Finally, the best result was obtained by combining the three optimal conditions. A high photoelectric conversion efficiency of 7.31% was achieved under illumination of simulated AM 1.5 sunlight (100mW/cm2). Compared to the previous result of 5.48%, the improvement of 33.4% was achieved.

Influence from Covering TiO2 Nanoparticles with Dense Films upon Electron Transport in Dye-Sensitized Solar Cells

2011 ◽  
Vol 399-401 ◽  
pp. 1399-1402
Author(s):  
Yong De Hao ◽  
Sheng Sheng Song
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Dense Films

The influence from the dense film coverings generated during the post treatment of TiCl4on the photoelectric conversion efficiency of the dye-sensitized solar cells (DSSCs) is investigated in the present paper. The effect of TiCl4treatment can be concluded into the following two points: 1. Covering TiO2nanoparticles with dense films and protecting the active Ti3+can enhance the electron transport. 2. The dense TiO2 is an ideal conducting film to cover the neck of nanoparticles, reduce the electron scattering and strengthen the electron transport. Acceleration of the electron transport can increase the short circuit current of the DSSCs as to obtain higher photoelectric conversion efficiency.

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