PPT-GaAs band gap engineering by colloidal PbS quantum dots

Bruno Ullrich Instituto de Ciencias Físicas Universidad Nacional Autónoma de México Cuernavaca Morelos CP 62210 Mexico Acknowledgements Joanna Wang WPAFB Akhilesh Singh UNAM. Arindam. . Ghosh. Organization of large number of nanostructures – scalability. Utilize natural forces. Organic, inorganic and biological systems. Physics research . on quantum dots. What are the active areas. Applications. Liang-. shi. Li, Indiana . University, DMR . 1105185. We have studied the charge transfer involving the colloidal graphene quantum dots (GQDs) for solar cell applications, and have investigated the effects of heteroatom-doping of the GQDs on their properties for other potential energy applications.. Lorelei Lewandowski. 4/20/2015. There are 7 II-VI semiconductor materials. Because of their direct, wide band gap energy, they are becoming increasingly useful in optical applications. While some of them have been around for many years, research is still needed to determine the full potential of others. The “latest and greatest” technology in the near future will most likely owe much of its success to these materials.. DPG Physics School 2010 on "Nano-Spintronics" . Duncan Steel - Lecture 2. Semiconductor Quantum Coherence Engineering. |0>. |1>. |0>. |1>. Optical Bloch Vector Qubit. Electronic Spin Qubit. Fernando . G.S.L. . Brand. ão. 1. . Aram Harrow. 2. Michal Horodecki. 3. Universidade. Federal de Minas . Gerais. , Brazil. University of Washington, USA. 3. . Gdansk University, Poland. IQC, November 2011. Behavior as . a . Function . of Optical . Electronegativity. for Semiconducting and Insulating Binary Oxides. Kristen . Dagenais. , Chemical Engineering, . UMBC. Matthew Chamberlain, Physics and Astronomy, James Madison . Darshana Wickramaratne. 1. , Y. . Alaskar. 2,3. , . S. Arafin. 2. , A. G. . Norman. 4. , . Jin . Zou. 5. , . Z. . Zhang. 5. , . K.L Wang. 2. , R. K. Lake. 1. 1 Dept. of Electrical and Computer Engineering, . Daniel Craft, Dr. John Colton, Tyler Park, Phil White, . Brigham Young University. Quantum Computing. Quantum states are the “1”s and “0”s of a classical computer. Certain tasks—like factoring large numbers—are exponentially faster. a . Function . of Optical . Electronegativity. for Semiconducting and Insulating Binary Oxides. Kristen . Dagenais. , Chemical Engineering, . UMBC. Matthew Chamberlain, Physics and Astronomy, James Madison . Quantum well or quantum wire confinements give the electron at least one degree of freedom Although this kind of confinement leads to quantization of the electron spectrum which changes the density of . Reactive Colloidal Silica –Reactive Colloidal Silica is 99.5% pure nano-sized silica particles suspended in an ultra-low surface tension liquid. (A “colloid” is a suspension of solid particles in a liquid; the solids are not dissolved, but they do not sink to the bottom and separate, either, due to a special process.). 1. Recap. Magnetoresistance. is the tendency of a material (often ferromagnetic) to change the value of its . electrical resistance. in an externally-applied . magnetic field. . . Vibrations and imperfections cause collisions, increasing the resistance of the crystal. . Gap. 1. Recap. Most energy bands are close to parabolic at their minima (for conduction band) or maxima for valence band. . In . the reciprocal space at reciprocal lattice points electron undergoes diffraction by the lattice, causing a discontinuity in the E k diagram. Hugh . Higinbotham. 1. Photovoltaics. (PVs). Convert . light to . electric current. GHG neutral energy source. Currently . cheaper than coal/natural gas on the utility scale, but not efficient enough to be do well in current energy market.