Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Advanced Materials Physics: A transparent view at UC Berkeley

Abstract:
Researchers have developed a transparent diode with copper-alloyed zinc sulfide as p-type conducting material.

Advanced Materials Physics: A transparent view at UC Berkeley

Germany | Posted on December 7th, 2012

The most recent issue of physica status solidi - pss (a) presents on the cover a photograph of a tower building being familiar to many scholars and researchers in the US and beyond. It shows the famous landmark of the Berkeley campus named Sather Tower, the Campanile of the University of California. If you are now wondering why the picture looks slightly fuzzy and faint, this is not owing to hot air on a sunny day, limited talent of the photographer or low performance of his equipment. On the contrary - the image is a proof of particularly high quality, namely that of the transparent semiconductor device through which it has been taken. The somewhat darker rectangular shadow surrounding the tower are the edges of a p-CuZnS/n-ZnO diode which has been recently prepared and developed by the groups of Ramamoorth Ramesh and Joel Ager of UC Berkeley and Lawrence Berkeley National Laboratory. It is schematically depicted on the lower left side of the cover picture.

Transparent conductors are essential components of modern electronics, ranging from solar cells over light emitting diodes to flat-panel displays. Researchers are intensely searching for alternatives to the traditionally used indium tin oxide (ITO) whose costs are rising due to scarcity and increasing demand for indium. Among oxides, ZnO is a candidate which, however, like most of these materials usually exhibits only n-type conductivity, making it difficult to produce bipolar devices like diodes or thin-film transistors. The authors of the pss (a) article, Anthony M. Diamond et al., have now assessed ZnS for this purpose which so far had been mainly known as a phosphor material. They were able to produce a p-type film with 10% Cu content which, at a thickness of 200 nm, still exhibits an optical transmission of 65% at a light wavelength of 550 nm. The highest conductivity (54 S cm-1) found is also comparable to the best reported other p-type materials, but with the advantage of elements zinc, sulfur and copper being abundant. These favorable properties have allowed them to produce a transparent heterojunction diode from the two components CuZnS and ZnO. After further optimization, this should allow application of this materials system for a variety of new transparent devices.

The article is the latest highlight in the new ‘Advanced Materials Physics' category launched earlier this year in pss (a). Selected articles feature outstanding work at the forefront and interface between solid state physics and materials science. A recent set of further free-to-read examples covers topics such as magnetoelectrics, nanophotonics and ionic conduction.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Link to the original paper on Wiley Online Library:

Related News Press

News and information

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Chip Technology

'Exotic' material is like a switch when super thin April 18th, 2014

Scientists open door to better solar cells, superconductors and hard-drives: Research enhances understanding of materials interfaces April 14th, 2014

Obducat has launched a new generation of SINDRE® Nano Imprint production system April 11th, 2014

Scientists in Singapore develop novel ultra-fast electrical circuits using light-generated tunneling currents April 10th, 2014

Discoveries

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Announcements

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE