Novel Family of Semiconductors

New research paper titled "Semiconducting silicon–phosphorus frameworks for caging exotic polycations" from researchers at Department of Chemistry, Iowa State University, and Ames Laboratory, U.S. Department of Energy. Abstract "A series of novel semiconductors AAe6Si12P20X (A = Na, K, Rb, Cs; Ae = Sr, Ba; X = Cl, Br, I) is reported. Their crystal structures feature a tetrahedral Si–P f... » read more

Making BaZrS3 Chalcogenide Perovskite Thin Films by Molecular Beam Epitaxy

Abstract: We demonstrate the making of BaZrS3 thin films by molecular beam epitaxy (MBE). BaZrS3 forms in the orthorhombic distorted-perovskite structure with corner-sharing ZrS6 octahedra. The single-step MBE process results in films smooth on the atomic scale, with near-perfect BaZrS3 stoichiometry and an atomically-sharp interface with the LaAlO3 substrate. The films grow epitaxially via tw... » read more

Improved Performance of GaN-Based Ultraviolet LEDs with the Stair-like Si-Doping n-GaN Structure

Abstract "A method to improve the performance of ultraviolet light-emitting diodes (UV-LEDs) with stair-like Si-doping GaN layer is investigated. The high-resolution X-ray diffraction shows that the UV-LED with stair-like Si-doping GaN layer possesses better quality and a lower dislocation density. In addition, the experimental results demonstrate that light output power and wall plug effici... » read more

Thinner Channels With 2D Semiconductors

Moving to future nodes will require more than just smaller features. At 3/2nm and beyond, new materials are likely to be added, but which ones and exactly when will depend upon an explosion of material science research underway at universities and companies around the globe. With field-effect transistors, a voltage applied to the gate creates an electric field in the channel, bending the ban... » read more

System Bits: March 26

Swear to tell the truth Lots of lies are told on the Internet. Shuyuan Ho of Florida State University wants to unveil those falsehoods with an online polygraph. “The future of my research is an online polygraph that could be used many different ways,” said Ho, an associate professor in the College of Communication and Information. “You could use it for online dating, Facebook, Twitter... » read more

System Bits: Sept. 2

Thinnest semiconductor A team of researchers from the University of Washington, the University of Hong Kong and the University of Warwick have demonstrated that two single-layer semiconductor materials can be connected in an atomically seamless fashion known as a heterojunction, which they expect could be the basis for next-generation flexible and transparent computing, better light-emitting d... » read more

Materials Market To Top $50 Billion In 2013

By Lara Chamness Given current macroeconomic headwinds, this year is proving to be challenging to forecast. Most analysts recently downgraded their semiconductor revenue forecasts to flat or low-single digits, down from the more optimistic forecasts of 4% to 6% growth presented earlier in the year. SEMI believes that the semiconductor materials will trend with the device market. As such, th... » read more