Organic Dye D149
Organic Dye D149 - Related Videos
12:51
A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
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2015
Organic dye molecules and oleic acid coated upconverting nanoparticles are not water-soluble. This protocol describes a ‘plug and play’ method that enables the transfer of organic dye molecules and upconverting particles from their initial hydrophobic solvent to water.
10:30
Dye-sensitized Solar Cells
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University Today's modern world requires the use of a large amount of energy. While we harness energy from fossil fuels such as coal and oil, these sources are nonrenewable and thus the supply is limited. To maintain our global lifestyle, we must extract energy from renewable sources. The most promising renewable source, in terms of abundance, is the sun, which provides us with more than enough solar energy to fully fuel our...
09:52
UV-Vis Spectroscopy of Dyes - Student Protocol
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2020
Source: Lara Al Hariri and Ahmed Basabrain at the University of Massachusetts Amherst, MA, USA Absorbance Wavelength ComparisonExpand In the first part of the lab, you'll use ultraviolet and visible light absorption spectroscopy, or UV-Vis absorption spectroscopy, to analyze the absorption characteristics of fluorescein, β-carotene, and indigo dye. To perform UV-Vis spectroscopy, you'll place a solution between a light source and a photodetector. The molecules will absorb light at...
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UV-Vis Spectroscopy of Dyes - Instructor Prep
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2020
Source: Lara Al Hariri at the University of Massachusetts Amherst, MA, USA Preparation of Dye SolutionsExpand Here, we show the laboratory preparation for 10 students working in pairs, with some excess. Please adjust quantities as needed. First, put on a lab coat, safety glasses, and nitrile gloves. Some solutions use hexane or dimethylformamide, so prepare those solutions in a fume hood. Prepare a 1 mM stock solution of fluorescein in water. Measure 0.0166 g of fluorescein...
08:36
FM Dyes in Vesicle Recycling
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2023
FM dyes are a class of fluorescent molecules that has found important use in studying the vesicle recycling process. By virtue of a chemical structure, these molecules can insert themselves into the outer leaflet of phospholipid bilayer membranes. After membrane insertion, they are internalized into the cell via endocytosed vesicles, and released when these vesicles recycle back to the membrane. Since, these dyes fluoresce strongly in the hydrophobic environment within membranes and weakly in...
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Its conjugated molecular structure provides electronic states that absorb visible photons. When light excites the dye, the resulting electronic excitation creates conditions for electron transfer into the adjacent semiconductor. In a dye-sensitized solar cell, this sequence connects molecular light absorption with charge generation in titanium dioxide, making the sensitizer structure central to photovoltaic device design.
Anchoring groups attach Organic Dye D149 to the semiconductor surface, typically titanium dioxide. This molecular attachment positions the light-absorbing sensitizer at the interface where photoexcitation can be followed by electron injection. The interface therefore links the dye’s electronic properties to the semiconductor and provides a key location for studying charge-transfer behavior.
Electron injection leaves the photoexcited dye in a changed electronic state, so a redox electrolyte or solid-state hole conductor supplies the process that regenerates it. This recovery allows the sensitizer to participate again in light absorption and charge transfer. Regeneration is therefore essential for linking repeated photoexcitation to continued photovoltaic operation.
Tunable electronic properties allow engineers to examine how sensitizer behavior relates to visible-light absorption and interfacial charge transfer. With Organic Dye D149, these relationships can be studied alongside nanostructured electrodes to guide device design. The resulting comparisons help identify material and interface strategies intended to improve solar-cell performance.
A basic design sequence places the dye on a nanostructured semiconductor electrode, commonly titanium dioxide, and then provides a redox electrolyte or solid-state hole conductor for dye regeneration. Under illumination, the assembled system is evaluated through photon absorption, electron injection, and charge-transfer behavior to assess its photovoltaic operation.
Organic Dye D149 offers a metal-free sensitizer system for examining how molecular absorption, semiconductor interfaces, and regeneration processes work together. Researchers can use it to investigate interfacial charge transfer and sensitizer regeneration while testing nanostructured electrode designs. These studies provide context for strategies aimed at improving solar-cell performance.