scholarly journals Multiligand Europium Complexes Incorporated Polyvinylpyrrolidone for Enhanced Solar Cell

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Zhimin Yu ◽  
Jing Guo ◽  
Desheng Li ◽  
Hai Lin
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Quantum Yield ◽  
Fluorescence Emission ◽  
Total Emission ◽  
Europium Complexes ◽  
Orange Fluorescence ◽  
Photon Conversion ◽  
Uv Visible ◽  
Reddish Orange

Intense reddish-orange fluorescence of Eu3+ is observed in multiligand europium complexes Eu(BA)(TTA)2 and Eu(BA)(TTA)2Phen doped polyvinylpyrrolidone (PVP). Under 367 nm UVA-LED pumping with 708.5 μW, the net emission powers are as high as 204.8 and 243.2 μW, and the total emission photon numbers are derived to be 635.9 × 1012 and 754.9 × 1012 cps for Eu(BA)(TTA)2 and Eu(BA)(TTA)2Phen doped PVP thin films, respectively. It is incredible that the quantum yield (QY) is up to 57.87% in the former; furthermore, as the introduction of Phen, the QY of Eu3+ is increased to 62.03%, verifying the effectiveness of multiligands in photon conversion. Conclusive photon quantification and efficient fluorescence emission reveal the potential of europium complexes/PVP as UV-visible conversion layers for enhanced solar cells.

scholarly journals CdSe Quantum Dots for Solar Cell Devices

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
A. B. Kashyout ◽  
Hesham M. A. Soliman ◽  
Marwa Fathy ◽  
E. A. Gomaa ◽  
Ali A. Zidan
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Solar Cells ◽  
Solar Cell ◽  
Wide Bandgap ◽  
Solar Irradiation ◽  
Cdse Quantum Dots ◽  
Solar Cell Performance ◽  
Organometallic Reagents ◽  
Uv Visible

CdSe quantum dots have been prepared with different sizes and exploited as inorganic dye to sensitize a wide bandgap TiO2thin films for QDs solar cells. The synthesis is based on the pyrolysis of organometallic reagents by injection into a hot coordinating solvent. This provides temporally discrete nucleation and permits controlled growth of macroscopic quantities of nanocrystallites. XRD, HRTEM, UV-visible, and PL were used to characterize the synthesized quantum dots. The results showed CdSe quantum dots with sizes ranging from 3 nm to 6 nm which enabled the control of the optical properties and consequently the solar cell performance. Solar cell of 0.08% performance under solar irradiation with a light intensity of 100 mW/cm2has been obtained. CdSe/TiO2solar cells without and with using mercaptopropionic acid (MPA) as a linker between CdSe and TiO2particles despite aVocof 428 mV,Jscof 0.184 mAcm-2, FF of 0.57, andηof 0.05% but with linker despite aVocof 543 mV,Jscof 0.318 mAcm-2, FF of 0.48, andηof 0.08%, respectively.

scholarly journals Rhodamine immunohistofluorescence applied to plant tissue.

1978 ◽  
Vol 26 (6) ◽  
pp. 478-482 ◽  
Author(s):  
S J Hapner ◽  
K D Hapner
Keyword(s):  
Plant Tissue ◽  
Immunohistochemical Staining ◽  
Fluorescence Emission ◽  
Green Light ◽  
Immunohistochemical Localization ◽  
Tissue Slices ◽  
Onobrychis Viciifolia ◽  
Orange Fluorescence ◽  
Reddish Orange ◽  
Rhodamine Isothiocyanate

Tissue slices from the roots and seeds of sanifoin (Onobrychis viciifolia, Scop.) exhibit bright autofluorescence when illuminated with blue (495 nm) light. This autofluorescence is indistinguishable from the fluorescence emission of fluorescein, the commonly used fluorochrome in immunohistochemical staining procedures. Rhodamine isothiocyanate, when coupled to immunoglobulin, and excited with green light at 546 nm, exhibits a reddish-orange fluorescence with an emission maximum at 590 nm. Plant tissue has little or no autofluorescence when illuminated at this wavelength and viewed with a 580 nm barrier filter. Therefore, use of rhodamine for immunohistochemical localization in plant tissue avoids interpretative complications due to inherent autofluorescence.

Effect of rapid thermal annealing on sprayed Cu2SnS3 thin films for solar-cell application

2020 ◽  
Vol 59 (10) ◽  
pp. 105503
Author(s):  
Wafaa Magdy ◽  
Ayaka Kanai ◽  
F. A. Mahmoud ◽  
E. T. El Shenawy ◽  
S. A. Khairy ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Solar Cell Application

Studies on DC Magnetron Sputtered AZO Thin Films for HIT Solar Cell Application

2020 ◽  
Vol 12 (2) ◽  
pp. 02037-1-02037-6
Author(s):  
Ranjitha R. ◽  
◽  
T. K. Subramanyam ◽  
S. Pavan kumar ◽  
Nagesh M ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Solar Cell Application

Single Crystal, High Band Gap CdS Thin Films Grown by RF Magnetron Sputtering in Argon Atmosphere for Solar Cell Applications

2018 ◽  
Vol 10 (3) ◽  
pp. 03005-1-03005-6 ◽  
Author(s):  
Rupali Kulkarni ◽  
◽  
Amit Pawbake ◽  
Ravindra Waykar ◽  
Ashok Jadhawar ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Magnetron Sputtering ◽  
Single Crystal ◽  
Band Gap ◽  
Rf Magnetron Sputtering ◽  
Argon Atmosphere ◽  
Cds Thin Films ◽  
High Band

scholarly journals Superior photo-carrier diffusion dynamics in organic-inorganic hybrid perovskites revealed by spatiotemporal conductivity imaging

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xuejian Ma ◽  
Fei Zhang ◽  
Zhaodong Chu ◽  
Ji Hao ◽  
Xihan Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Relaxation Times ◽  
Charge Trapping ◽  
Free Carrier ◽  
Carrier Dynamics ◽  
Electron Hole ◽  
Inorganic Hybrid ◽  
Diffusion Dynamics ◽  
The Difference

AbstractThe outstanding performance of organic-inorganic metal trihalide solar cells benefits from the exceptional photo-physical properties of both electrons and holes in the material. Here, we directly probe the free-carrier dynamics in Cs-doped FAPbI3 thin films by spatiotemporal photoconductivity imaging. Using charge transport layers to selectively quench one type of carriers, we show that the two relaxation times on the order of 1 μs and 10 μs correspond to the lifetimes of electrons and holes in FACsPbI3, respectively. Strikingly, the diffusion mapping indicates that the difference in electron/hole lifetimes is largely compensated by their disparate mobility. Consequently, the long diffusion lengths (3~5 μm) of both carriers are comparable to each other, a feature closely related to the unique charge trapping and de-trapping processes in hybrid trihalide perovskites. Our results unveil the origin of superior diffusion dynamics in this material, crucially important for solar-cell applications.

Optical Properties and Zinc Nitride Thin Films Prepared Using Magnetron Reactive Sputtering

2014 ◽  
Vol 940 ◽  
pp. 11-15
Author(s):  
Jun Qin Feng ◽  
Jun Fang Chen
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Near Infrared ◽  
Fluorescence Emission ◽  
Emission Spectra ◽  
Sem Images ◽  
Fluorescence Emission Spectra ◽  
Glass Substrates ◽  
Zinc Nitride ◽  
Direct Band

Zinc nitride films were deposited by ion sources-assisted magnetron sputtering with the use of Zn target (99.99% purity) on 7059 glass substrates. The films were characterized by XRD, SEM and EDS, the results of which show that the polycrystalline zinc nitride thin film can be grown on the glass substrates, the EDS spectrum confirmed the chemical composition of the films and the SEM images revealed that the zinc nitride thin films have a dense structure. Ultraviolet-visible-near infrared spectrophotometer was used to study the transmittance behaviors of zinc nitride thin films, which calculated the optical band gap by Davis Mott model. The results of the fluorescence emission spectra show the zinc nitride would be a direct band gap semiconductor material.

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