Sökning: "photochemical upconversion"

Hittade 5 avhandlingar innehållade orden photochemical upconversion.

1. 1. Systematic Studies of Triplet Annihilating Species for Photochemical Upconversion

   Författare :Axel Olesund; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; triplet-triplet annihilation; solar energy conversion; photochemical upconversion;

   Sammanfattning : With climate change already setting new temperature records and causing more extreme weather events, transitioning to clean and renewable energy sources is more urgent than ever. Solar energy harvesting arguably holds the most promise with the abundance of terrestrial sunlight available. LÄS MER

3. 2. Using Low Energy Light to Enable High Energy Photochemistry

   Författare :Wera Larsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; triplet-triplet annihilation; solar energy conversion; photochemistry; molecular photoswitches; photochemical upconversion; triplet sensitization; fluorescence modulation;

   Sammanfattning : Manipulating light to meet human needs is pivotal in various research fields and technological applications, ranging from solar energy conversion to photodynamic therapy and fluorescence imaging of cells and tissues. This thesis addresses the spectral mismatches between available light and the specific energy requirements of target photochemical reactions by employing low-energy light to control high-energy photochemistry. LÄS MER

4. 3. New Insights Regarding the Efficient Design of Photon Upconversion Systems

   Författare :Axel Olesund; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; fluorescence; solar energy conversion; semiconductor nanocrystals; intramolecular TTA; photon upconversion; photochemistry; triplet-triplet annihilation;

   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. 4. Unconventional Modulation of Diarylethene Photoswitches

   Författare :Wera Larsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; photochromic molecules; photochemistry; photon upconversion; molecular photoswitches; triplet-triplet annihilation; diarylethene; nanocrystals; triplet sensitization;

   Sammanfattning : Light can be manipulated and modulated to fit a particular need or application, such as overcoming a spectral mismatch when facilitating a high energy photochemical reaction. This can be of use in various applications, including solar energy conversion and biological contexts. LÄS MER

7. 5. Excited state dynamics in the strong coupling regime

   Författare :Jürgen Mony; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Strong exciton-photon coupling; Excited state dynamics; light-matter interactions; photoswitch; aggregated states;

   Sammanfattning : Strong exciton-photon coupling exhibits the possibility to modify photophysical and photochemical properties of organic molecules without changing their structure. This is due to the formation of hybrid light-matter states, called polaritons, which are created when the strong coupling regime is achieved. LÄS MER