Layer-by-Layer-Assembled Quantum Dot Multilayer Sensitizers: How the Number of Layers Affects the Photovoltaic Properties of One-Dimensional ZnO Nanowire Electrodes

ChemPhysChem ◽  
2013 ◽  
Vol 15 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Ho Jin ◽  
Sukyung Choi ◽  
Sang-Hoon Lim ◽  
Shi-Woo Rhee ◽  
Hyo Joong Lee ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Layer By Layer ◽  
Zno Nanowire ◽  
Photovoltaic Properties ◽  
One Dimensional ◽  
Number Of Layers

Constructing PbS quantum dot sensitized ZnO nanorod array photoelectrodes for highly efficient photovoltaic devices

2016 ◽  
Vol 94 (7) ◽  
pp. 687-692
Author(s):  
Masood Mehrabian ◽  
Naser Ghasemian
Keyword(s):  
Quantum Dot ◽  
Short Circuit ◽  
Zno Nanorods ◽  
Growth Period ◽  
Short Circuit Current ◽  
Nanorod Array ◽  
Open Circuit ◽  
Zno Film ◽  
Photovoltaic Properties ◽  
Pbs Quantum Dot

Solar cells with ZnO film/ZnO nanorods (NRs)/PbS quantum dot (QD) photoelectrodes were constructed and various properties were studied. The ZnO NRs were grown for different periods varying from 0 (ZnO film) to 30 min (ZnO NR30) and the effect of growth period on the photovoltaic properties was investigated. The cell with ZnO film/PbS QD as photoelectrode showed the open circuit voltage VOC of 0.59 V, short circuit current density JSC of 10.06 mAcm−2, and the power conversion efficiency of 3.29% under one sun illumination (air mass 1.5 global illumination at 100 mWcm−2). In a device containing of ZnO film/ZnO NR10/PbS QD (as photoelectrode), mentioned photovoltaic parameters increased to 0.61 V, 10.47 mAcm−2 and 3.81%, respectively.

Direct Spectroscopic Evidence for the Formation of One-Dimensional Wetting Wires During the Growth of InGaAs/GaAs Quantum Dot Chains

Nano Letters ◽  
2006 ◽  
Vol 6 (9) ◽  
pp. 1847-1851 ◽  
Author(s):  
Xiaoyong Wang ◽  
Zhiming M. Wang ◽  
Baolai Liang ◽  
Gregory J. Salamo ◽  
Chih-Kang Shih
Keyword(s):  
Quantum Dot ◽  
Spectroscopic Evidence ◽  
One Dimensional ◽  
Gaas Quantum Dot

scholarly journals Structure and photovoltaic properties of ZnO nanowire for dye-sensitized solar cells

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Ming-Cheng Kao ◽  
Hone-Zern Chen ◽  
San-Lin Young ◽  
Chen-Cheng Lin ◽  
Chung-Yuan Kung
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Zno Nanowire ◽  
Photovoltaic Properties ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Building Vertical Walls by Deposition of Molten Metal Droplets

2005 ◽  
Author(s):  
M. Fang ◽  
S. Chandra ◽  
C. B. Park
Keyword(s):  
Surface Layer ◽  
Analytical Solution ◽  
Substrate Temperature ◽  
Layer By Layer ◽  
Droplet Temperature ◽  
Droplet Generator ◽  
One Dimensional ◽  
Metallurgical Bonding ◽  
Experimental Parameters ◽  
Vertical Walls

Experiments were conducted to determine conditions under which good metallurgical bonding was achieved in vertical walls composed of multiple layers of droplets that were fabricated by depositing tin droplets layer by layer. Molten tin droplets (0.75 mm diameter) were deposited using a pneumatic droplet generator on an aluminum substrate. The primary parameters varied in experiments were those found to most affect bonding between droplets on different layers: droplet temperature (varied from 250°C to 325°C) and substrate temperature (varied from 100°C to 190°C). Considering the cooling rate of droplet is much faster than the deposition rate previous deposition layer cooled down too much that impinging droplets could only remelt a thin surface layer after impact. Assuming that remelting between impacting droplets and the previous deposition layer is a one-dimensional Stefan problem with phase change an analytical solution can be found and applied to predict the minimum droplet temperature and substrate temperature required for local remelting. It was experimentally confirmed that good bonding at the interface of two adjacent layers could be achieved when the experimental parameters were such that the model predicted remelting.

scholarly journals DYNAMICS OF LAYER-BY-LAYER DESTRUCTION OF CARBON PLASTIC BY LIGHTNING CURRENTS: THEORY AND EXPERIMENT

2020 ◽  
pp. 67-73
Author(s):  
Igor A. Guschin
Keyword(s):  
Experimental Studies ◽  
Neumann Boundary ◽  
Aircraft Design ◽  
Carbon Plastic ◽  
Layer By Layer ◽  
Experiment Data ◽  
Conductive Medium ◽  
Transverse Current ◽  
Number Of Layers ◽  
Current Densities

On the basis of two models of lightning currents spreading on carbon plastic, the criteria of material destruction are determined. One of the models – the anisotropic conductive medium model from the Laplace equation with specified Neumann boundary conditions – makes it possible to obtain an exact solution in the form of Bessel functions for longitudinal and transverse current densities and to consider the material destruction zones by the radius and the depth. The model adequately describes the experiment with different arrangement of electrodes simulating the passage of lightning currents on constructions made of conductive composite and metal. The second – the model of composite layered structure – is constructed using the diagram of carbon plastic substitution and makes it possible to find the distribution of currents by a numerical method. The results of the calculations for both models are well consistent. The dynamics analysis of carbon plastic destruction revealed the criteria of destruction with parameters of real carbon plastic and experiment data that do not contradict the parameters of carbon plastic destruction obtained in foreign experimental studies. These criteria allow to determine the dependence between the value of the current integral and the number of layers of the composite material. Options with a small number of layers and with a large one when the reach-through breakdown criterion is possible were taken into account. Comparison of calculated and experimental destruction data showed good curve matching. The obtained criteria make it possible to predict the effects of lightning exposure under different material parameters and to take measures to improve the lightning resistance of carbon plastic products at the stage of aircraft design.

scholarly journals Impacts of Post-metallisation Processes on the Electrical and Photovoltaic Properties of Si Quantum Dot Solar Cells

2010 ◽  
Vol 5 (11) ◽  
pp. 1762-1767 ◽  
Author(s):  
Dawei Di ◽  
Ivan Perez-Wurfl ◽  
Angus Gentle ◽  
Dong-Ho Kim ◽  
Xiaojing Hao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Photovoltaic Properties ◽  
Si Quantum Dot ◽  
Quantum Dot Solar Cells
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