Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"photothermal deflection spectroscopy"”.
-
Estimating The Thermal Properties Of Thin Film And Multilayer Structures Using Photothermal Deflection Spectroscopy
Photothermal deflection spectroscopy (PDS) is an experimental technique which may be used to determine the thermal properties of materials. An intensity modulated heating laser is used to generate periodic thermal waves in the material and the surrounding gas phase. A probe laser is passed through …
-
Direct measure of band edge optical absorption of silicon nanostructures using photothermal deflection spectroscopy
… For this study, absorption was measured using photothermal deflection spectroscopy (PDS). PDS is a highly sensitive technique which can directly measure the optical absorption of materials through the generated heat. The first part of the thesis focuses on the structural and optical properties …
-
Charge transport and mechanical property study of high mobility conjugated polymers
… sensitive absorption techniques, including the photothermal deflection spectroscopy(PDS) technique is used to correlate the microstructure property of these materials to their energetic disorder. Charge transport property of these newly emerged materials is investigated by OFETs …
-
Understanding and Controlling the Optoelectronic Properties of Cs2AgBiBr6 Double Perovskite
… as 30 nm. For the second area, I show through photothermal deflection spectroscopy measurements that mixed alloys of Cs2Ag(SbxBi1-x)Br6 (x between 0.5 and 0.9) demonstrate smaller bandgaps than the pure Sb- or Bi-based compounds. The reduction in the bandgap of Cs2AgBiBr6 achieved through …
-
Performance limits for colloidal quantum dot and emerging thin-film solar cells
… QD solar cells worth pursuing further?" We use photothermal deflection spectroscopy to characterize disorder-induced band tailing in PbS QD films across dierent QD sizes, ligands, and processing conditions. Based on these measurements, we calculate radiative eciency limits ranging from 26% to …
-
Light-emitting diodes from polyfluorenes: characterisation and stability of performance
… (PFB) by photothermal deflection spectroscopy (PDS) shows that the polymer undergoes a doping reaction with poly(styrene sulphonic acid). This is important because the two materials are found in intimate contact in LED structures. The conditions for reaction …
-
Chemical Modifications and Passivation Approaches in Metal Halide Perovskite Solar Cells
This dissertation describes our study on different physical properties of passivated and chemically modified hybrid metal halide perovskite materials and development of highly efficient charge transport layers for perovskite solar cells. We first developed an efficient electron transport layer via …