Design and Control of Nanostructures and Interfaces for Excitonic Solar Cells

2017 ◽  
pp. 635-679
Author(s):  
Jianjun Tian ◽  
Shixun Wang ◽  
Guozhong Cao
Keyword(s):  
Solar Cells ◽  
And Control ◽  
Excitonic Solar Cells

Excitonic Solar Cells Using 2D Perovskite of (BA)2(FA)2Pb3I10

2021 ◽  
Vol 125 (3) ◽  
pp. 2212-2219
Author(s):  
Shu Hu ◽  
Xiao Yang ◽  
Bo Yang ◽  
Yang Zhang ◽  
Heng Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Excitonic Solar Cells

Effect of Semiconductor and Dye Interfacial Properties in Dye-Sensitized Solar Cells

2001 ◽  
Vol 710 ◽  
Author(s):  
Jin-An He ◽  
Ravi Mosurkal ◽  
Jayant Kumar ◽  
Lian Li ◽  
K. G. Chittibabu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Passive Layer ◽  
Layer By Layer ◽  
Electron Recombination ◽  
Redox Species ◽  
Interfacial Modification ◽  
Assembly Technique ◽  
Polyelectrolyte Film ◽  
And Control

ABSTRACTThe back recombination processes of electrons from the semiconductor to the oxidized dye and the oxidized redox species can dramatically reduce the efficiency of conventional dyesensitized solar cells (DSSCs). In this work, we have used the electrostatic layer-by-layer (ELBL) assembly technique to specifically manipulate and control the interface between the semiconductor and adsorbed dye layers in DSSCs to potentially minimize this recombination behavior. The interfacial modification has been achieved by applying different combinations and thicknesses of polyelectrolytes using the ELBL method and the performance of the cells has been monitored by measuring the I-V characteristics and the efficiency of the solar cells. The results indicate that an ultrathin polyelectrolyte film, on the order of a few Angstroms, between the semiconductor and the dye layer plays a crucial role on the performance of the solar cell. More specifically, the efficiencies of the DSSCs do not show any improvement after the interfacial treatment when compared to untreated samples. Surprisingly, the efficiency of the cells decreases to some degree, depending on the thickness of the polyelectrolyte films. This suggests that incorporation of a thin (several Angstroms) passive layer between the semiconductor and dye layer in these devices results in an increased resistance of the device and do not significantly reduce the back electron recombination as was originally anticipated. These results show interesting mechanistic information regarding the interfacial interactions of semiconductor/dye interfaces in DSSCs.

Coulomb Forces in Excitonic Solar Cells

2017 ◽  
pp. 139-160
Author(s):  
Brian A. Gregg
Keyword(s):  
Solar Cells ◽  
Excitonic Solar Cells

scholarly journals Excitonic Solar Cells: A Review

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
M. Samy ◽  
M. Salem ◽  
T. Abdolkader
Keyword(s):  
Solar Cells ◽  
Excitonic Solar Cells

Organic and nano-structured composite photovoltaics: An overview

2005 ◽  
Vol 20 (12) ◽  
pp. 3167-3179 ◽  
Author(s):  
Sophie E. Gledhill ◽  
Brian Scott ◽  
Brian A. Gregg
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Semiconductors ◽  
Organic Solar Cells ◽  
Organic Materials ◽  
Low Cost ◽  
Open Circuit ◽  
Charge Generation ◽  
Dye Sensitized ◽  
Excitonic Solar Cells

Organic photovoltaic devices are poised to fill the low-cost, low power niche in the solar cell market. Recently measured efficiencies of solid-state organic cells are nudging 5% while Grätzel’s more established dye-sensitized solar cell technology is more than double this. A fundamental understanding of the excitonic nature of organic materials is an essential backbone for device engineering. Bound electron-hole pairs, “excitons,” are formed in organic semiconductors on photo-absorption. In the organic solar cell, the exciton must diffuse to the donor–accepter interface for simultaneous charge generation and separation. This interface is critical as the concentration of charge carriers is high and recombination here is higher than in the bulk. Nanostructured engineering of the interface has been utilized to maximize organic materials properties, namely to compensate the poor exciton diffusion lengths and lower mobilities. Excitonic solar cells have different limitations on their open-circuit photo-voltages due to these high interfacial charge carrier concentrations, and their behavior cannot be interpreted as if they were conventional solar cells. This article briefly reviews some of the differences between excitonic organic solar cells and conventional inorganic solar cells and highlights some of the technical strategies used in this rapidly progressing field, whose ultimate aim is for organic solar cells to be a commercial reality.

Novel titanium nitride halide TiNX (X = F, Cl, Br) monolayers: potential materials for highly efficient excitonic solar cells

2018 ◽  
Vol 6 (5) ◽  
pp. 2073-2080 ◽  
Author(s):  
Yan Liang ◽  
Ying Dai ◽  
Yandong Ma ◽  
Lin Ju ◽  
Wei Wei ◽  
...  
Keyword(s):  
Solar Cells ◽  
Titanium Nitride ◽  
Highly Efficient ◽  
Excitonic Solar Cells

Titanium nitride halide TiNX (X = F, Cl, Br) monolayers for highly efficient excitonic solar cells.

Suppression of surface and Auger recombination by formation and control of radial junction in silicon microwire solar cells

Nano Energy ◽  
2019 ◽  
Vol 58 ◽  
pp. 817-824 ◽  
Author(s):  
Fei Wu ◽  
Hao Lin ◽  
Zhenhai Yang ◽  
Mingdun Liao ◽  
Zilei Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Auger Recombination ◽  
Silicon Microwire ◽  
And Control
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