scholarly journals Preparation of Hybrid Molybdenum Disulfide/Single Wall Carbon Nanotube–n-Type Silicon Solar Cells

2019 ◽  
Vol 10 (1) ◽  
pp. 287
Author(s):  
Samira Almalki ◽  
LePing Yu ◽  
Tom Grace ◽  
Abdulaziz S. R. Bati ◽  
Joseph G. Shapter
Keyword(s):  
Solar Cells ◽  
Carbon Nanotube ◽  
Fill Factor ◽  
Single Wall Carbon Nanotubes ◽  
Photovoltaic Devices ◽  
Layer System ◽  
Solar Cell Efficiency ◽  
Single Wall Carbon ◽  
Heterojunction Solar Cells ◽  
Cell Efficiency

Carbon nanotube/silicon (CNT/Si) heterojunction solar cells represent one new architecture for photovoltaic devices. The addition of MoS2 to the devices is shown to increase the efficiency of the devices. Two structures are explored. In one case, the single wall carbon nanotubes (SWCNTs) and MoS2 flakes are mixed to make a hybrid, which is then used to make a film, while in the other case, a two layer system is used with the MoS2 deposited first followed by the SWCNTs. In all cases, the solar cell efficiency is improved largely due to significant increases in the fill factor. The rise in fill factor is due to the semiconducting nature of the MoS2, which helps with the separation of charge carriers.

scholarly journals Junction Configuration Effects on the Photovoltaic Parameters of a-Si/CZTS Solar Cells

2022 ◽  
Author(s):  
H. Bitam ◽  
B. Hadjoudja ◽  
Beddiaf Zaidi ◽  
C. Shakher ◽  
S. Gagui ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Cells ◽  
Solar Cell ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Photovoltaic Devices ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Reported Study ◽  
Stated Problem

Due to increased energy intensive human activities resulting accelerated demand for electric power coupled with occurrence of natural disasters with increased frequency, intensity, and duration, it becomes essential to explore and advance renewable energy technology for sustainability of the society. Addressing the stated problem and providing a radical solution has been attempted in this study. To harvest the renewable energy, among variety of solar cells reported, a composite a-Si/CZTS photovoltaic devices has not yet been investigated. The calculated parameters for solar cell based on the new array of layers consisting of a-Si/CZTS are reported in this study. The variation of i) solar cell efficiency as a function of CZTS layer thickness, temperature, acceptor, and donor defect concentration; ii) variation of the open circuit current density as a function of temperature, open circuit voltage; iii) variation of open circuit voltage as a function of the thickness of the CZTS layer has been determined. There has been no reported study on a-Si/CZTS configuration-based solar cell, analysis of the parameters, and study to address the challenges imped efficiency of the photovoltaic device and the same has been discussed in this work. The value of the SnO2/a-Si/CZTS solar cells obtained from the simulation is 23.9 %.

High-Energy Electron and Proton Irradiation of Cu(In,Ga)Se2 Heterojunction Solar Cells

2001 ◽  
Vol 668 ◽  
Author(s):  
A. Jasenek ◽  
A. Boden ◽  
K. Weinert ◽  
M. R. Balboul ◽  
H. W. Schock ◽  
...  
Keyword(s):  
Solar Cells ◽  
Proton Irradiation ◽  
High Efficiency ◽  
High Energy ◽  
Open Circuit ◽  
Solar Cell Efficiency ◽  
Heterojunction Solar Cells ◽  
Cell Efficiency ◽  
Radiation Induced ◽  
Induced Defects

ABSTRACTWe investigate radiation-induced defects in high-efficiency Cu(In,Ga)Se2/CdS/ZnO heterojunction solar cells after 1-MeV electron and 4-MeV proton irradiation. We use electron and proton fluences of more than 1018 cm−2 and up to 1014 cm−2, respectively. The irradiation experiments performed at three independent electron irradiation facilities consistently prove the superior radiation resistance of these Cu(In,Ga)Se2 devices compared to other types of solar cells. The reduction of the solar cell efficiency in all experiments is predominantly caused by a loss ΔVOC of the open circuit voltage VOC. An analytical model describes ΔVOC in terms of radiation-induced defects enhancing recombination in the Cu(In,Ga)Se2 absorber material. From our model we extract the defect introduction rates for recombination centers in Cu(In,Ga)Se2 for the respective particles and energies. Isochronal annealing steps fully recover VOC of the irradiated Cu(In,Ga)Se2 solar cells. Exposure to temperatures of approx. 400 K are sufficient to restore the initial VOC within less than 5 %, even after excessive irradiation. The annealing process displays an activation energy of EA = 1.1 eV. Admittance spectroscopy directly reveals the generation and the annealing of radiation-induced defects.

scholarly journals Functionalized rGO Interlayers Improve the Fill Factor and Current Density in PbS QDs-Based Solar Cells

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4221 ◽  
Author(s):  
Anton A. Babaev ◽  
Peter S. Parfenov ◽  
Dmitry A. Onishchuk ◽  
Aliaksei Dubavik ◽  
Sergei A. Cherevkov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Current Density ◽  
Fill Factor ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Reduced Graphene ◽  
Graphene Derivatives ◽  
State Densities ◽  
Significant Attention

Graphene-quantum dot nanocomposites attract significant attention for novel optoelectronic devices, such as ultrafast photodetectors and third-generation solar cells. Combining the remarkable optical properties of quantum dots (QDs) with the exceptional electrical properties of graphene derivatives opens a vast perspective for further growth in solar cell efficiency. Here, we applied (3-mercaptopropyl) trimethoxysilane functionalized reduced graphene oxide (f-rGO) to improve the QDs-based solar cell active layer. The different strategies of f-rGO embedding are explored. When f-rGO interlayers are inserted between PbS QD layers, the solar cells demonstrate a higher current density and a better fill factor. A combined study of the morphological and electrical parameters of the solar cells shows that the improved efficiency is associated with better layer homogeneity, lower trap-state densities, higher charge carrier concentrations, and the blocking of the minor charge carriers.

scholarly journals Influence of traces of oxidized polymer on the performances of bulk heterojunction solar cells

2019 ◽  
Vol 3 (8) ◽  
pp. 1632-1641 ◽  
Author(s):  
Anthony Perthué ◽  
Thérèse Gorisse ◽  
Hugo Santos Silva ◽  
Didier Bégué ◽  
Agnès Rivaton ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Bulk Heterojunction ◽  
Oxidation Products ◽  
Bottom Up ◽  
Solar Cell Efficiency ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells ◽  
Cell Efficiency ◽  
Polymer Oxidation

An innovative bottom-up approach was used to reveal the importance of traces of polymer oxidation products in altering solar cell efficiency.

Additive regulated crystallization and film formation of CH3NH3PbI3−xBrx for highly efficient planar-heterojunction solar cells

2015 ◽  
Vol 3 (36) ◽  
pp. 18514-18520 ◽  
Author(s):  
Jian He ◽  
Tao Chen
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Film Formation ◽  
Solar Cell Efficiency ◽  
Heterojunction Solar Cells ◽  
Cell Efficiency ◽  
Highly Efficient ◽  
Planar Heterojunction Solar Cells ◽  
Planar Heterojunction

The addition of NH4Cl can efficiently improve the CH3NH3PbI3−xBrx film formability and the solar cell efficiency.

scholarly journals Insights into chemical doping to engineer the carbon nanotube/silicon photovoltaic heterojunction interface

2017 ◽  
Vol 5 (46) ◽  
pp. 24247-24256 ◽  
Author(s):  
L. Yu ◽  
T. Grace ◽  
M. Batmunkh ◽  
M. Dadkhah ◽  
C. Shearer ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Carbon Nanotube ◽  
Chemical Doping ◽  
Hybrid Films ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Heterojunction Solar Cells

Graphene oxide/single-wall carbon nanotube (GOCNT) hybrid films have been used to fabricate heterojunction solar cells with silicon (Si) due to their compatibility with both aqueous and organic processing.

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