Essays about: "UV-Vis spectroscopy"

Showing result 21 - 25 of 41 essays containing the words UV-Vis spectroscopy.

1. 21. Manufacturing optimization and film stability analysis of PbS quantum dot solar cells

   University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Author : Erik Bryngelsson; [2019]
   Keywords : Quantum dots; Solar cells; Photovoltaics; PbS; Optimization;

   Abstract : Semiconductor colloidal quantum dots have an interesting potential to increase solar cell efficiency, with strong absorption in the infrared region and a tunable band gap. In this work an attempt was made to adopt a manufacturing process for PbS quantum dot solar cells, proven successful at Uppsala University. READ MORE

3. 22. Degradation of Microplastic Residuals in Water by Visible Light Photocatalysis

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Tajkia Syeed Tofa; [2018]
   Keywords : Microplastics; Low density Polyethylene LDPE ; Heterogeneous photocatalytic degradation; Zinc oxide nanorods; Visible light.;

   Abstract : Microplastic (MP) pollution has recently been recognized as a threat to the biosphere including humans due to its widespread distribution, persistent nature and infinitesimal size. This study focused on the solid phase degradation of microplastic residues (particularly low density polyethylene, LDPE) in water through heterogeneous photocatalysis process by designed photocatalysts of zinc oxide nanorods (ZnO NRs) and platinum nanoparticles deposited on zincoxide nanorods (Pt NPs-ZnO NRs) under visible light irradiation. READ MORE

4. 23. Creation of thin film CuSbSe2 through closed space vapor transportdeposition

   University essay from Uppsala universitet/Institutionen för teknikvetenskaper

   Author : Malin Eriksen; [2018]
   Keywords : CuSbSe; CuSbSe2;

   Abstract : With an increasing demand for fossil-free energy the development of efficient solar cells made from sustainable and abundant materials is needed. A promising group of new absorber materials are the chalcogenide materials, including the chalcostibnite compounds copper antimony selenide, CuSbSe2. READ MORE

5. 24. IDENTIFYING PIGMENTS A Multi-Instrumental Study of Ivar Arosenius’ Use of Pigments

   University essay from Göteborgs universitet/Institutionen för kulturvård

   Author : Victoria Skalleberg; [2017-06-27]
   Keywords : conservation science; XRF; UV-VIS FORS; MSI; The Arosenius Project; sketch book;

   Abstract : In this study, the pigments used by the Swedish artist Ivar Arosenius (1878-1909), in one of his sketch books (T 19/2001, Gothenburg Museum of Art), were examined and identified. The study used noninvasive and non-destructive analytical methods, and aims to determine what pigments Arosenius used and how well the analytical methods perform in examination of this particular object. READ MORE

6. 25. Evaluation of Amyloid Fibrils as Templates for Photon Upconversion by Sensitized Triplet-Triplet Annihilation

   University essay from KTH/Skolan för kemivetenskap (CHE)

   Author : Sharon Berkowicz; Helena Olsson; Henrik Broberg; [2017]
   Keywords : photon upconversion; sensitized triplet-triplet annihilation; anti-stokes emission; amyloid fibrils; whey protein;

   Abstract : In the face of global warming and shrinking resources of fossil fuels the interest in solar energy has increased in recent years. However, the low energy and cost efficiency of current solar cells has up to this date hindered solar energy from playing a major role on the energy market. READ MORE