A5023513577- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Luminescence Properties of Advanced Materials
- Photonic Crystals and Applications
- Advanced Photocatalysis Techniques
- Nanowire Synthesis and Applications
- Near-Field Optical Microscopy
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanocluster Synthesis and Applications
University of Toronto
2016-2019
Colloidal quantum dot (CQD) materials are of interest in thin-film solar cells due to their size-tunable bandgap and low-cost solution-processing. However, CQD suffer from inefficient charge extraction over the film thicknesses required for complete absorption light. Here we show a new strategy enhance light by nanostructuring itself at back interface. We use two-dimensional finite-difference time-domain (FDTD) simulations study quantitatively enhancement nanostructured interfaces cells....
We developed a strategy that transforms phosphor down-converting white light sources from low-power systems into efficient high-power ones. To incorporate multiple phosphors, we generalized and extended layer model, which term CCAMP (color correction analysis for phosphors). describes both the scattering saturation of materials allows modeling different layered structures. employed mixture comprising YAG:Ce K2TiF6:Mn4+ to illustrate effectiveness model. YAG:Ce's high density small particle...
With rapid progress in the use of colloidal quantum dots (QDs) as light emitters, next challenge for this field is to achieve high brightness. Unfortunately, Auger recombination militates against emission efficiency at multiexciton excitation levels. Here, we suppress Auger-recombination-induced photoluminescence (PL) yield (QY) loss CdSe/CdS core–shell QDs by reducing absorption cross section wavelengths via a thin-shell design. Studies PL vs shell thickness reveal that better retain their...
Continuous-wave (CW) lasing was recently achieved in colloidal quantum dots (CQDs) by lowering the threshold through introduction of biaxial strain. However, CW laser is still much higher than femtosecond threshold. This must be addressed before electrically injected can realized. Here we investigate relationship between and temperature find a subpicosecond recombination process that proceeds very efficiently at temperatures reached during excitation. We combine density functional theory...