3D-ZnO Nanorods Photoelectrodes for Quantum-Dot Sensitized Solar Cells

2013 ◽  
Vol 448-453 ◽  
pp. 1433-1436
Author(s):  
Yan Li Chen ◽  
Wu You Fu ◽  
Pin Lv
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Zno Nanorods ◽  
Three Dimensional ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Silar Method ◽  
Chemical Solution Method ◽  
Cds Qds ◽  
Sensitized Solar Cells

In this study, the three dimensional ZnO (3D-ZnO) nanorods were synthesized by a simple chemical solution method, which were used as photoelectrodes, and CdS QDs were deposited on the surface of the 3D-ZnO nanorods to act a light absorber by using the successive ionic layer adsorption and reaction (SILAR) method. The photovoltaic performances of the semiconductor quantum dots sensitized solar cells based on CdS QDs/3D-ZnO photoelectrodes were investigated. A maximum 5.06 mA/cm2short circuit current density and 1.03% conversion efficiency under one sun illumination has been achieved. These results demonstrate that the CdS QDs-sensitized 3D-ZnO nanorods photoelectrode has a potential application in solar cells.

A green synthesis of CISe nanocrystal ink and preparation of quantum dot sensitized solar cells

2020 ◽  
Vol 13 (06) ◽  
pp. 2050028
Author(s):  
Tianyu Guo ◽  
Hui Zhang ◽  
Guifeng Chen ◽  
Boling Long ◽  
Luxiao Xie ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Short Circuit ◽  
Quantum Confinement Effect ◽  
Zno Nanorods ◽  
Triethylene Glycol ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Sensitized Solar Cells

I–III–VI chalcopyrite copper indium selenium is one of therepresentatives of the light absorbing layer material, and is often used for a thin-film solar cell. With the development of nano-technology, CuInSe2 quantum dots (CISe QDs) which have intermediate belt and excitation effect characteristics are applied to the solar cells as an alternative of Cd- or S-based QDs. Most conventional methods for the synthesis of CISe QDs using solution involve the dangerous and environmentally unfriendly Oleylamine or phosphine coordination compounds. In this work, CISe QDs were synthesized by a green, safe and low-temperature method in triethylene glycol. Through controlling the growth temperature and time, the diameter can be adjusted from 3[Formula: see text]nm to 10[Formula: see text]nm. The samples exhibit quantum confinement effect, and have a controllable optical band gap. QDs were deposited on the surface of ZnO nanorods to obtain a photoanode, which were fabricated into quantum dot-sensitized solar cells. The device exhibits size-dependent performance. And the open circuit voltage shows a fluctuation up to 0.26[Formula: see text]V. When the size is 4[Formula: see text]nm, the short circuit current density is the largest (15[Formula: see text]mA/cm2).

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 Synthesis of ZnxCd1-xSe@ZnO Hollow Spheres in Different Sizes for Quantum Dots Sensitized Solar Cells Application

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 132 ◽  
Author(s):  
Libo Yu ◽  
Zhen Li
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Exchange Process ◽  
Photovoltaic Performance ◽  
Hollow Spheres ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Composition Gradient ◽  
Sensitized Solar Cells ◽  
Zno Hollow Spheres

ZnxCd1-xSe@ZnO hollow spheres (HS) were successfully fabricated for application in quantum dot sensitized solar cells (QDSSCs) based on ZnO HS through the ion-exchange process. The sizes of the ZnxCd1-xSe@ZnO HS could be tuned from ~300 nm to ~800 nm using ZnO HS pre-synthesized by different sizes of carbonaceous spheres as templates. The photovoltaic performance of QDSSCs, especially the short-circuit current density (Jsc), experienced an obvious change when different sizes of ZnxCd1-xSe@ZnO HS are employed. The ZnxCd1-xSe@ZnO HS with an average size distribution of ~500 nm presented a better performance than the QDSSCs based on other sizes of ZnxCd1-xSe@ZnO HS. When using the mixture of ZnxCd1-xSe@ZnO HS with different sizes, the power conversion efficiency can be further improved. The size effect of the hollow spheres, light scattering, and composition gradient structure ZnxCd1-xSe@ZnO HS are responsible for the enhancement of the photovoltaic performance.

scholarly journals Doped Heterojunction Used in Quantum Dot Sensitized Solar Cell

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yanyan Gao ◽  
Xiaoping Zou ◽  
Zongbo Huang
Keyword(s):  
Quantum Dot ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Silar Method ◽  
Foreign Atom ◽  
Layer Adsorption ◽  
Lattice Distortions ◽  
Sensitized Solar Cells

Incorporated foreign atoms into the quantum dots (QDs) used in heterojunction have always been a challenge for solar energy conversion. A foreign atom indium atom was incorporated into PbS/CdS QDs to prepare In-PbS/In-CdS heterojunction by successive ionic layer adsorption and reaction method which is a chemical method. Experimental results indicate that PbS or CdS has been doped with In by SILAR method; the concentration of PbS and CdS which was doped In atoms has no significantly increase or decrease. In addition, incorporating of Indium atoms has resulted in the lattice distortions or changes of PbS or CdS and improved the light harvest of heterojunction. Using this heterojunction, Pt counter electrode and polysulfide electrolyte, to fabricate quantum dot sensitized solar cells, the short circuit current density ballooned to 27.01 mA/cm2from 13.61 mA/cm2and the open circuit voltage was improved to 0.43 V from 0.37 V at the same time.

The Preparation of TiO2 Nanotube by ZnO Nanorod Template Method and Application in Dye-Sensitized Solar Cells

2014 ◽  
Vol 602-603 ◽  
pp. 888-892
Author(s):  
Yan Xiang Wang ◽  
Yu Hong Ye ◽  
Jian Sun
Keyword(s):  
Seed Layer ◽  
Short Circuit ◽  
Zno Nanorods ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Immersion Method ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Titanium dioxide (TiO2) nanotubes film was deposited on conducting glass oxide (FTO) by using ZnO nanorods as template, and the TiO2nanotubes film was applied in DSCs. First, ZnO nanorods were fabricated on ZnO-doped TiO2seed layer coated substrates by the hydrothermal method. Second, the obtained ZnO nanorods were used as a template to synthesize ZnOTiO2coreshell structure through the immersion method. Third, the ZnO nanorods template was removed by etching method to obtained TiO2nanotubes film. The thickness of ZnO-doped TiO2seed layer is about 200nm and the crystalline size of nanoparticles are about 5~10nm. The length of the ZnO nanorods are about 1~3μm. The TiO2nanotube was composed of TiO2nanoparticles. The short-circuit current density (Jsc), open-circuit voltage, fill factor (FF) and efficiency of TiO2nanotubes DSC were 4.63 mA·cm-2, 0.74V, 62% and 2.15%, respectively.

Improved Carbon Counter Electrodes for Dye Sensitized Solar Cells

2007 ◽  
Vol 31 ◽  
pp. 176-178
Author(s):  
Hyeon Seok Lee ◽  
Heon Yong Lee ◽  
S.Y. Ahn ◽  
K.H. Kim ◽  
J.Y. Kwon
Keyword(s):  
Solar Cells ◽  
Surface Morphology ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

We fabricated improved carbon counter electrodes to improve conversion efficiency of dye sensitized solar cells (DSSCs). Unlike conventional carbon counter electrodes, we added small quantity of TiO2 nano powder and used chemical sintering methodology developed by Park’s group to make surface morphology of the electrodes to change. Through these methods, we could observe change of surface morphology of carbon electrodes and influences on short circuit current density (JSC) and conversion efficiency.

scholarly journals Superior Photocurrent of Quantum Dot Sensitized Solar Cells Based on PbS : In/CdS Quantum Dots

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Zongbo Huang ◽  
Xiaoping Zou
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Short Circuit ◽  
Energy Levels ◽  
Short Circuit Current ◽  
Energy Conversion Efficiency ◽  
Short Circuit Current Density ◽  
Cds Quantum Dots ◽  
Sensitized Solar Cells

PbS : In and CdS quantum dots (QDs) are sequentially assembled onto a nanocrystalline TiO2film to prepare a PbS : In/CdS cosensitized photoelectrode for QD sensitized solar cells (QDSCs). The results show that PbS : In/CdS QDs have exhibited a significant effect in the light harvest and performance of the QDSC. In the cascade structure of the electrode, the reorganization of energy levels between PbS and TiO2forms a stepwise structure of band-edge levels which is advantageous to the electron injection into TiO2. Energy conversion efficiency of 2.3% is achieved with the doped electrode, under the illumination of one sun (AM1.5, 100 mW cm2). Besides, a remarkable short circuit current density (up to 23 mA·cm−2) is achieved in the resulting PbS : In/CdS quantum dot sensitized solar cell, and the related mechanism is discussed.

scholarly journals Improved conversion efficiency of 10% for solid-state dye-sensitized solar cells utilizing P-type semiconducting CuI and multi-dye consisting of novel porphyrin dimer and organic dyes

2018 ◽  
Vol 6 (45) ◽  
pp. 22508-22512 ◽  
Author(s):  
Naohiko Kato ◽  
Shinya Moribe ◽  
Masahito Shiozawa ◽  
Ryo Suzuki ◽  
Kazuo Higuchi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Organic Dyes ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Dye Sensitized ◽  
P Type ◽  
Sensitized Solar Cells

To realize highly efficient solid-state dye-sensitized solar cells (SDSCs), the absorption range of the dye should be extended to the near-IR range to increase short-circuit current density (Jsc); a high Jsc in turn requires a highly conductive p-type semiconductor.

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