Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Chip Technology

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

A firefly's flash inspires new nanolaser light July 18th, 2017

GLOBALFOUNDRIES and VeriSilicon To Enable Single-Chip Solution for Next-Gen IoT Networks: Integrated solution leverages GFs 22FDX technology to decrease power, area, and cost for NB-IoT and LTE-M applications July 14th, 2017

Nanometrics to Announce Second Quarter Financial Results on August 1, 2017 July 14th, 2017

Discoveries

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Pulses of electrons manipulate nanomagnets and store information: Scientists use electron pulses to create and manipulate nanoscale magnetic excitations that can store data July 21st, 2017

The first light atomic nucleus with a second face July 20th, 2017

Announcements

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

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

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

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