Photoluminescence quenching of a CdS nanoparticles/ZnO nanorods core–shell heterogeneous film and its improved photovoltaic performance

2014 ◽  
Vol 37 ◽  
pp. 766-772 ◽  
Author(s):  
S.A. Vanalakar ◽  
S.S. Mali ◽  
M.P. Suryawanshi ◽  
N.L. Tarwal ◽  
P.R. Jadhav ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Zno Nanorods ◽  
Cds Nanoparticles ◽  
Core Shell ◽  
Photoluminescence Quenching ◽  
Heterogeneous Film

Au Nanoparticles Effect on Inverted ZnO Nanorods/Organic Hybrid Solar Cell Performance

2021 ◽  
Vol 11 (1) ◽  
pp. 165-171
Author(s):  
Pham Hoai Phuong ◽  
Kang Jea Lee ◽  
Huynh Tran My Hoa ◽  
Hoang Hung Nguyen ◽  
Quang Trung Tran ◽  
...  
Keyword(s):  
Active Layer ◽  
Photovoltaic Performance ◽  
Zno Nanorods ◽  
Localized Surface Plasmon ◽  
Cathode Layer ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Solar Cell Performance ◽  
Au Nps ◽  
Organic Hybrid

The sun provides a plentiful and inexpensive source of carbon-neutral energy that has yet to be fully utilized. This is a major driving force behind the development of organic photovoltaic (OPV) materials and devices, which are expected to offer benefits such as low cost, flexibility, and widespread availability. For the photovoltaic performance enhancement of the inverted ZnO-nanorods (NR)/organic hybrid solar cells with poly(3-exylthiophene):(6,6)-phenyl-C61-butyric-acid-methylester (P3HT:PCBM) and poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) active layers, gold nanoparticles (Au-NPs) were introduced into the interface between indium-thin-oxide cathode layer and ZnO cathode buffer layer, and the efficiency improvement was observed. It's worth noting that adding Au NPs had both a positive and negative impact on device performance. Au NPs were shown to be advantageous to localized surface plasmon resonance (LSPs) in the coupling of dispersed light from ZnO NRs in order to extend the light's path length in the absorbing medium. Although the light absorption in the active layer could be enhanced, Au NPs might also act as recombination centers within the active layer. To avoid this adverse effect, Au NPs are covered by the ZnO seeded layer to prevent Au NPs from direct contact with the active layer. The dominant surface plasmonic effect of Au NPs increased the photoelectric conversion efficiency from 2.4% to 3.8%.

scholarly journals Improved Photoresponse Characteristics of a ZnO-Based UV Photodetector by the Formation of an Amorphous SnO2 Shell Layer

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6124
Author(s):  
Junhyuk Yoo ◽  
Uijin Jung ◽  
Bomseumin Jung ◽  
Wenhu Shen ◽  
Jinsub Park
Keyword(s):  
Shell Structure ◽  
Rise Time ◽  
Zno Nanorods ◽  
Wide Bandgap ◽  
Core Shell ◽  
Shell Layer ◽  
Slow Response ◽  
Uv Photodetector ◽  
Zno Nanostructure ◽  
Core Shell Structure

Although ZnO nanostructure-based photodetectors feature a well-established system, they still present difficulties when being used in practical situations due to their slow response time. In this study, we report on how forming an amorphous SnO2 (a-SnO2) shell layer on ZnO nanorods (NRs) enhances the photoresponse speed of a ZnO-based UV photodetector (UV PD). Our suggested UV PD, consisting of a ZnO/a-SnO2 NRs core–shell structure, shows a rise time that is 26 times faster than a UV PD with bare ZnO NRs under 365 nm UV irradiation. In addition, the light responsivity of the ZnO/SnO2 NRs PD simultaneously increases by 3.1 times, which can be attributed to the passivation effects of the coated a-SnO2 shell layer. With a wide bandgap (~4.5 eV), the a-SnO2 shell layer can successfully suppress the oxygen-mediated process on the ZnO NRs surface, improving the photoresponse properties. Therefore, with a fast photoresponse speed and a low fabrication temperature, our as-synthesized, a-SnO2-coated ZnO core–shell structure qualifies as a candidate for ZnO-based PDs.

Synthesis of ZnO@CuS Core–Shell Nanocomposites by Thermal Decomposition Method and Their Photocatalytic Application

2020 ◽  
Vol 20 (8) ◽  
pp. 5223-5238
Author(s):  
Vanita Sharma ◽  
P. Jeevanandam
Keyword(s):  
Thermal Decomposition ◽  
Photocatalytic Activity ◽  
Diphenyl Ether ◽  
Zno Nanorods ◽  
Core Shell ◽  
Shell Formation ◽  
Molecular Precursor ◽  
Photocatalytic Application ◽  
Ft Ir ◽  
Considerable Work

Considerable work is being carried out recently to develop nanomaterials which can act as photocatalyst under sunlight. In the present study, ZnO@CuS core–shell nanocomposites were synthesized and their photocatalytic activity has been investigated. The nanocomposites were prepared by thermal decomposition of a single molecular precursor, cyclo-tri-μ-thioacetamide-tris(chlorocopper(I)) complex ([Cu3TAA3Cl3]), in the presence of ZnO nanorods in diphenyl ether at 200 °C. The effect of reaction time and precursor concentration on copper sulfide shell formation have been investigated. The ZnO@CuS core–shell nanocomposites were characterized using different techniques such as XRD, FE-SEM, TEM, FT-IR, UV-Vis, DRS and XPS. As compared to bare ZnO nanorods, the ZnO@CuS nanocomposites show better photocatalytic activity towards degradation of congo red in an aqueous solution under sunlight.

scholarly journals Enhancing the Photovoltaic Performance of Perovskite Solar Cells Using Plasmonic Au@Pt@Au Core-Shell Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1263 ◽  
Author(s):  
Bao Wang ◽  
Xiangyu Zhu ◽  
Shuhan Li ◽  
Mengwei Chen ◽  
Nan Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Chemical Reduction ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Local Surface Plasmon Resonance ◽  
Core Shell Nanoparticles

Au@Pt@Au core-shell nanoparticles, synthesized through chemical reduction, are utilized to improve the photoelectric performance of perovskite solar cells (PSCs) in which carbon films are used as the counter electrode, and the hole-transporting layer is not used. After a series of experiments, these Au@Pt@Au core-shell nanoparticles are optimized and demonstrate outstanding optical and electrical properties due to their local surface plasmon resonance and scattering effects. PSC devices containing 1 wt.% Au@Pt@Au core-shell nanoparticles have the highest efficiency; this is attributable to their significant light trapping and utilization capabilities, which are the result of the distinctive structure of the nanoparticles. The power conversion efficiency of PSCs, with an optimal content of plasmonic nanoparticles (1 wt.%), increased 8.1%, compared to normal PSCs, which was from 12.4% to 13.4%; their short-circuit current density also increased by 5.4%, from 20.5 mA·cm−2 to 21.6 mA·cm−2. The open-circuit voltages remaining are essentially unchanged. When the number of Au@Pt@Au core-shell nanoparticles in the mesoporous TiO2 layer increases, the photovoltaic parameters of the former shows a downward trend due to the recombination of electrons and holes, as well as the decrease in electron transporting pathways.

scholarly journals Fabrication of ZnO@Ag3PO4 Core-Shell Nanocomposite Arrays as Photoanodes and Their Photoelectric Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1254 ◽  
Author(s):  
Yi ◽  
Li ◽  
Wu ◽  
Chen ◽  
Yang ◽  
...  
Keyword(s):  
Performance Test ◽  
Structural Characteristics ◽  
Energy Dispersive Spectrometer ◽  
Zno Nanorods ◽  
Element Distribution ◽  
Core Shell ◽  
Photoelectric Properties ◽  
Component Test ◽  
Photoelectric Performance ◽  
Light Reflectance

In this study, we combine the methods of magnetron sputtering, hydrothermal growth, and stepwise deposition to prepare novel ZnO@Ag3PO4 core-shell nanocomposite arrays structure. Through scanning electron microscope (SEM) topography test, energy dispersive spectrometer (EDS) element test and X-ray diffractometry (XRD) component test, we characterize the morphology, element distribution and structural characteristics of ZnO@Ag3PO4 core-shell nanocomposite arrays structure. At the same time, we test the samples for light reflectance, hydrophilicity and photoelectric performance. We find that after deposition of Ag3PO4 on ZnO nanorods, light reflectance decreases. As the time of depositions increases, light reflectance gradually decreases. After the deposition of Ag3PO4, the surface of the sample shows super hydrophilicity, which is beneficial for the photoelectric performance test. Through the optical transient response test, we find that the photo-generated current reaches a maximum when a small amount of Ag3PO4 is deposited. As the time of depositions of Ag3PO4 increases, the photogenerated current gradually decreases. Finally, we conducted an alternating current (AC) impedance test and also verified the correctness of the photocurrent test. Therefore, the structure is expected to be prepared into a photoanode for use in fields such as solar cells.

In-situ pulsed laser induced growth of CdS nanoparticles on ZnO nanorods surfaces

2020 ◽  
Vol 125 ◽  
pp. 110790
Author(s):  
Y. Rodríguez-Martínez ◽  
J. Alba-Cabañas ◽  
O. Cruzata ◽  
S. Bianco ◽  
E. Tresso ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Pulsed Laser ◽  
Cds Nanoparticles
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