Sökning: "Photon Upconversion"
Visar resultat 1 - 5 av 20 avhandlingar innehållade orden Photon Upconversion.
1. Photon Upconversion in Heavily Doped Semiconductors
Sammanfattning : In this thesis the luminescence properties of highly doped semiconductors are studied with focus on degenerately n-doped InP. It is demonstrated how photoluminescence measurements on degenerately doped semiconductors allow an estimation of the doping concentration without need for electrical contacts. LÄS MER
2. Advancing Upconversion Emissions for Biomedical Imaging
Sammanfattning : During the past decade, upconverting nanoparticles (UCNPs) doped with rare earth ions have become an important class of fluorescence contrast agents for molecular imaging, due to their unique properties. Their property of anti-Stokes luminescence, with both the excitation and emission wavelengths close to the optimal for biomedical imaging, has been extensively explored in various biomedical applications. LÄS MER
3. Intramolecular Electronic Interactions in Photon Upconversion and Singlet Fission
Sammanfattning : The sun provides our planet with an abundance of energy in the form of solar light – a continuous stream of photons. Increasing our direct utilization of solar energy will constitute a necessary part in our ongoing replacement of fossil fuels with energy sources free from greenhouse gas emissions. LÄS MER
4. New Insights Regarding the Efficient Design of Photon Upconversion Systems
Sammanfattning : The transition from fossil fuels to renewable energy sources is arguably the most important weapon in combating global climate change. Existing solar technologies could be significantly improved using unconventional ways of manipulating the solar spectrum. LÄS MER
5. Photon Upconversion through Triplet-Triplet Annihilation: Towards Higher Efficiency and Solid State Applications
Sammanfattning : The sun is the only renewable energy source that can accommodate humanity’s energyneeds today and in the foreseeable future. The sunlight reaching the planet’s surfaceis filtrated through the atmosphere, reducing its UV-light intensity in the 300-400 nmrange, which indeed can be harmful to life as we know it in too large doses. LÄS MER