scholarly journals Enhanced Electron Lifetime of CdSe/CdS Quantum Dot (QD) Sensitized Solar Cells Using ZnSe Core–Shell Structure with Efficient Regeneration of Quantum Dots

2015 ◽  
pp. 150123143809004 ◽  
Author(s):  
Rasin Ahmed ◽  
Long Zhao ◽  
Attila J. Mozer ◽  
Geoffrey Will ◽  
John Bell ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Shell Structure ◽  
Core Shell ◽  
Electron Lifetime ◽  
Cds Quantum Dot ◽  
Efficient Regeneration ◽  
Core Shell Structure ◽  
Sensitized Solar Cells

Galvanic-Cell-Based Synthesis and Photovoltaic Performance of ZnO-CdS Core-Shell Nanorod Arrays for Quantum Dots Sensitized Solar Cells

2014 ◽  
Vol 618 ◽  
pp. 64-68 ◽  
Author(s):  
Le Ha Chi ◽  
Pham Duy Long ◽  
Hoang Vu Chung ◽  
Do Thi Phuong ◽  
Do Xuan Mai ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Photovoltaic Performance ◽  
Galvanic Cell ◽  
Core Shell ◽  
Nanorod Arrays ◽  
Cds Quantum Dot ◽  
Sensitized Solar Cells

Zinc oxide (ZnO) is recognized as one of the most attractive metal oxides because of its direct wide band gap (3.37 eV) and large exciton binding energy (60 meV), which make it promising for various applications in solar cells, gas sensors, photocatalysis and so on. Here, we report a facile synthesis to grow well-aligned ZnO nanorod arrays on SnO2: F (FTO) glass substrates without the ZnO seed layer using a Galvanic-cell-based method at low temperature (<100°C). CdS quantum dot thin films were then deposited on the nanorod arrays in turn by an effective successive ionic layer adsorption and reaction (SILAR) process to form a ZnO/CdS core-shell structure electrode. Structural, morphological and optical properties of the ZnO/CdS nanorod heterojunctions were investigated. The results indicate that CdS quantum dot thin films were uniformly deposited on the ZnO nanorods and the thickness of the CdS shell can be controlled by varying the number of the adsorption and reaction cycles. The number of quantum dots layers affects on photovoltaic performance of the ZnO/CdS core-shell nanorod arrays has been investigated as photoanodes in quantum dots sensitized solar cells.

Enhanced electron lifetime in CdS quantum dot-sensitized solar cells with nanoporous-layer-covered TiO2 nanotube arrays

2011 ◽  
Vol 110 (5) ◽  
pp. 054301 ◽  
Author(s):  
Sung Woo Jung ◽  
Jeong-Hyun Park ◽  
Wonjoo Lee ◽  
Jae-Hong Kim ◽  
Hyunsoo Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Electron Lifetime ◽  
Cds Quantum Dot ◽  
Sensitized Solar Cells ◽  
Nanoporous Layer

Improving the performance of quantum dot sensitized solar cells through CdNiS quantum dots with reduced recombination and enhanced electron lifetime

2016 ◽  
Vol 45 (20) ◽  
pp. 8447-8457 ◽  
Author(s):  
Chandu V. V. M. Gopi ◽  
Mallineni Venkata-Haritha ◽  
Hyunwoong Seo ◽  
Saurabh Singh ◽  
Soo-Kyoung Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Charge Recombination ◽  
Electron Lifetime ◽  
Cds Qds ◽  
Sensitized Solar Cells

Ni2+ doped CdS QDs in QDSSCs can suppress charge recombination, prolong the electron lifetime and improve the PCE of the cell.

Characterization of a TiO2/Multi-Wall Carbon Nanotube Core–Shell Nanocomposite Synthesized by a Hydrothermal Method

2020 ◽  
Vol 20 (6) ◽  
pp. 3582-3587 ◽  
Author(s):  
Moo-Hyun Seo ◽  
Kyeong-Han Na ◽  
Wan-Hee Yang ◽  
Tae-Hyeob Song ◽  
Won-Youl Choi
Keyword(s):  
Solar Cells ◽  
Electron Microscope ◽  
Carbon Nanotube ◽  
Charge Transport ◽  
Shell Structure ◽  
Dye Sensitized Solar Cells ◽  
Core Shell ◽  
Dye Sensitized ◽  
Core Shell Structure ◽  
Sensitized Solar Cells

TiO2 is a significant n-type semiconducting material because of its superior electric and photocatalytic properties. Although this material has been extensively studied as a semiconductor electrode for dye-sensitized solar cells for its inherent bandgap and its excellent electrical and chemical properties, the photoelectric efficiency is nevertheless lower than that of the Si-based solar cells, which is generally reported as 13–27%. On the other hand, various carbon structures have been studied to increase the overall charge transport efficiency by reducing the charge transport resistance in the cell while having high electric conductivity. These results are expected to improve the photoelectric conversion efficiency when applied to dye-sensitized solar cells. We fabricated a TiO2/multi-wall carbon nanotube (MWCNT) core–shell structure by a hydrothermal method. The TiO2 anatase phase in the TiO2/MWCNT core–shell structure was confirmed by X-ray diffraction (XRD). The core–shell nanostructure with a diameter of 127 nm to 211 nm was observed by field emission scanning electron microscope (FE-SEM). The morphology of the TiO2/MWCNT core–shell nanocomposite was also analyzed by transmission electron microscope (TEM). The Fourier-Transform Infrared Spectrometer (FT-IR) and Brunauer Emmett and Teller (BET) method were used to observe the chemical bonding and specific surface area of the TiO2/MWCNT core–shell nanocomposite, respectively. The TiO2/MWCNT core–shell composites had a larger specific surface area of 92.00 m2/g, a larger pore volume of 0.33 cm3/g, and a larger pore size of 65.21 nm than commercial TiO2 nanoparticles (P25). The TiO2/MWCNT core–shell structure may provide a high-speed path for photoelectrons to pass quickly and will be useful for various applications, such as solar cells and photocatalysts.

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