Keyword Suggestions

Results
 
 
Account Login
 
 
 
 
 

Library Navigation

 
 

Browse Meetings

 
 
 
II9.10 - Air-Stable n-Doped Colloidal HgS and HgSe Quantum Dots with Mid-Infrared Intraband Photoresponse 
Date/Time:
December 4, 2014   11:45am - 12:00pm
 
Speaker:
 
Taxonomy
 
 
II-VI 
 
 
 
Share:
 

Colloidal quantum dots (CQDs) have been studied extensively because of their wide color tunability, solution-processing potential and many potential applications such as fluorescence sensing, photovoltaics, detectors, and generally printable electronics. Most of the research is based on the interband absorption or fluorescence between conduction band and valence band states. However, there is also the possibility of using the intraband transitions, the transitions between states within the conduction or valence bands. To take advantage of the intraband transitions, it is essential to have some carrier doping in the lowest quantum states. However, no stable carrier doping in ambient condition had been observed in CQDs before the air-stable n-doped HgS1 and HgSe QDs. This makes it now possible to investigate the intraband photoresponse. In this talk, I will introduce the synthesis of n-doped HgS and HgSe QDs, and their fascinating optoelectronic properties, focusing on their intraband optical properties of absorption and luminescence and especially the first intraband photoconductivity observed with colloidal quantum dot solids. The intraband photoresponse covers the mid-infrared atmospheric transparency, 3 to 5 microns. Colloidal Quantum Dots Intraband Photodetection is a striking new possibility with solution-processed materials, fully taking advantage of the quantum confinement, as well as a novel direction for research on infrared devices.
 


 
 
Average Rating: (No Ratings)
  Was great, surpassed expectations, and I would recommend this
  Was good, met expectations, and I would recommend this
  Was okay, met most expectations
  Was okay but did not meet expectations
  Was bad and I would not recommend this
 



Submit
 
Performance Enhancement of Pentacene Based Organic Field-Effect Transistor through DNA Interlayer
Semiconducting Polymer-Dipeptide Nanostructures by Ultrasonically-Assisted Self-Assembling
DNA as a Molecular Wire: Distance and Sequence Dependence
Structure-Property Relationship in Biologically-Derived Eumelanin Cathodes Electrochemical Energy Storage
Artificial Physical and Chemical Awareness (proprioception) from Polymeric Motors