This project is studying photovoltaic solid state devices utilizing semiconducting colloidal nanocrystal quantum dots. Objectives include enabling fabrication of hybridquantum dot (QD) planar heterojunction PVs, improving morphology of printed QD films, and scale-up of QD synthesis. Quality, Productivity and Accomplishments (Average Rating 3.2) Rating Comments 3.0 Well-qualified team led by Bul...

214 Semiconductor lasers are ubiquitous in modern society and play a key role in technologies ranging from CD players to optical telecommunications. Current-generation lasers have high power output and low lasing thresholds, are stable over a wide range of temperatures, and are cheap and easy to produce. Still, there is room for improvement. We are developing a new type of laser based on ultras...

this study examined the ability of the synthetic mordenite nanocrystal to remove tl(iii) and as(iii) from an aqueous solution. the determination of the concentration changes of h+ and oh- quantities in the acidic (ph 3) and alkali (ph 9) treated mordenite nanocrystals were done by the potentiometric titration curves. the maximum uptake capacities (qmax) of these metal ions using the mordenite i...

the objective of this research was to compare the tensile, permeability, solubility and color properties of plasticized starch-polyvinyl alcohol-montmo-rillonite (ps-pva-mmt) and plasticized starch-polyvinyl alcohol-cellulose nanocrystal (ps-pva-ncc) bionanocomposite flms. the results showed that adding mmt (7%), increased the ultimate tensile strenght from 4.2 mpa to 4.61 mpa, however, ncc (7%...

co2+ & er3+ co-doped zno nanocrystals were synthesized by the hydrothermal method at 180°c and ph= 12 for 48 h. powder xrd patterns indicate that the zn1-2xerxcoxo crystals (0.00

Light detection is the underlying principle of many optoelectronic systems. For decades, semiconductors such as silicon carbide, silicon, indium gallium arsenide and germanium have dominated the photodetector industry. They can exhibit excellent photosensitivity but are limited by one or more aspect, for example high production cost, high temperature processing, flexible substrate incompatibili...

We describe the operation of a silicon optical nanocrystal memory device. The programmed logic state of the device is read optically by the detection of high or low photoluminescence intensity. The suppression of excitonic photoluminescence is attributed to the onset of fast nonradiative Auger recombination in the presence of an excess charge carrier. The device can be programmed and erased ele...

Titanium silicide grows on silicon in a form of discontinuous layers, which is the most serious obstacle to the formation of high-quality epilayers for VLSI applications. At the same time, nanometric dimensions of the epitaxial silicide islands attract interest as quantum nanostructures. However, for this purpose, nanocrystals in a self-assembled array have to be defect-free, and exhibit high s...

This work reports the development of renewable cellulose nanocrystal (CNC) and ionic liquid (IL) hybrid materials for bending actuator applications.

The robustness of layered metal hydroxide nanocrystal-based mesoporous materials was improved by interconnecting the nanocrystals through polymerization intercalated organic anions.