Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > World's first large(wafer)-scale production of III-V semiconductor nanowire

This is an electrical characterization of the heterojunction solar cells composed of n- InAs0.7P0.3 nanowire array on p-Si (111) substrate.

Credit: UNIST
This is an electrical characterization of the heterojunction solar cells composed of n- InAs0.7P0.3 nanowire array on p-Si (111) substrate.

Credit: UNIST

Abstract:
The research team demonstrated a novel method to epitaxially synthesize structurally and compositionally homogeneous and spatially uniform ternary InAsyP1-y nanowire on Si at wafer-scale using metal-organic chemical vapor deposition (MOCVD). The high quality of the nanowires is reflected in the remarkably narrow PL and X-ray peak width and extremely low ideality factor in the InAsyP1-y nanowire/Si diode.

World's first large(wafer)-scale production of III-V semiconductor nanowire

Ulsan, South Korea | Posted on June 10th, 2013

A nanowire is a nanostructure with a diameter of the order of a nanometer (10-9 meters). Alternatively, nanowires can be defined as structures that have a thickness or diameter constrained to tens of nanometers or less and an unconstrained length. Technology related to nanowires has been selected as one of the 10 Breakthrough Technologies of 2004 by MIT Technology Review.

High-aspect-ratio semiconductors have led to significant breakthroughs in conventional electrical, optical, and energy harvesting devices. Among such structures, III-V semiconductor nanowires offer unique properties arising from their high electron mobility and absorption coefficients, as well as their direct bandgaps.

A common technique for creating a nanowire is Vapor-Liquid-Solid (VLS) synthesis. This process can produce crystalline nanowires of some semiconductor materials. However, metal catalysts, usually expensive noble metals, should be used for initiating the VLS mechanism. In addition, these metal catalysts are known to significantly degrade the quality of semiconductor nanowires by creating deep levels, thus limiting practical applications of nanowires into opto-electronic devices.

In this work, however, Prof. Choi's group developed a novel technique of growing III-V semiconductor nanowires without metal catalysts or nano-patterning. Metal-organic chemical vapor deposition (MOCVD, AIXTRON A200) was used for the growth of the InAsyP1-y. 2 inch Si (111) wafer was cleaned with buffer oxide etch for 1 minute and deionized (DI) water for 2 seconds. Then, the wafer was immediately dipped in poly-L-lysine solution (Sigma-Aldrich inc.) for 3 minutes then rinsed in DI water for 10 seconds. The Si substrate was then loaded into the MOCVD reactor without any delay. The reactor pressure was lowered to 50 mbar with 15liter/min of hydrogen gas flow. Then the reactor was heated to growth temperatures (570 - 630 ℃), and stabilized for 10 minutes.

Kyoung Jin Choi, Associate Professor at Ulsan National Institute of Science and Technology (UNIST), Korea, and Xiuling Li, Professor at University of Illinois, U.S.A. led the research and this description of the new research was published on the web on May 7 in ACS Nano. (Title: Wafer-Scale Production of Uniform InAsyP1-y Nanowire Array on Silicon for Heterogeneous Integration).

"If we develop new technology which manages the density of nanowire and bandgap energy with further study, it is also possible to produce high-efficiency & low-cost large scale solar cells," said Prof. Choi. "This technology will give us a chance to lead the research on the new renewable energy."

This work was supported by the Future-based Technology Development Program (Nano Fields) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology.

####

For more information, please click here

Contacts:
Eunhee Song

82-522-171-224

Copyright © Ulsan National Institute of Science and Technology(UNIST)

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 News Press

News and information

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Ucore's McKenzie to Deliver Presentation to Rare Earths Conference in Singapore as Highlight of Fall 2014 Marketplace Schedule October 19th, 2014

Govt.-Legislation/Regulation/Funding/Policy

HP Supercomputer at NREL Garners Top Honor October 19th, 2014

First Canada Excellence Research Chair gets $10 million from the federal government for oilsands research at the University of Calgary: Federal government announces prestigious research chair to study improving oil production efficiency October 19th, 2014

Superconducting circuits, simplified: New circuit design could unlock the power of experimental superconducting computer chips October 18th, 2014

QD Vision Wins Prestigious Presidential Green Chemistry Challenge Award from the U.S. Environmental Protection Agency October 16th, 2014

Chip Technology

Superconducting circuits, simplified: New circuit design could unlock the power of experimental superconducting computer chips October 18th, 2014

3DXNano™ ESD Carbon Nanotube 3D Printing Filament - optimized for demanding 3D printing applications in the semi-con and electronics industry October 16th, 2014

Future computers could be built from magnetic 'tornadoes' October 14th, 2014

Australian teams set new records for silicon quantum computing October 12th, 2014

Nanoelectronics

Future computers could be built from magnetic 'tornadoes' October 14th, 2014

Aledia’s Nanowire LED Technology Endorsed By 2014 Physics Nobel Prize Winner: Hiroshi Amano Serves on Company’s Scientific Advisory Board October 13th, 2014

Fast, cheap nanomanufacturing: Arrays of tiny conical tips that eject ionized materials could fabricate nanoscale devices cheaply October 4th, 2014

SUNY Colleges of Nanoscale Science and Engineering and National Institute for Occupational Safety and Health Announce Expanded Partnership October 2nd, 2014

Discoveries

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Non-Toxic Nanocatalysts Open New Window for Significant Decrease in Reaction Process October 19th, 2014

Announcements

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Ucore's McKenzie to Deliver Presentation to Rare Earths Conference in Singapore as Highlight of Fall 2014 Marketplace Schedule October 19th, 2014

Research partnerships

IRLYNX and CEA-Leti to Streamline New CMOS-based Infrared Sensing Modules Dedicated to Human-activities Characterization October 15th, 2014

Scientists Map Key Moment in Assembly of DNA-Splitting Molecular Machine: Crucial steps and surprising structures revealed in the genesis of the enzyme that divides the DNA double helix during cell replication October 15th, 2014

Unique catalysts for hydrogen fuel cells synthesized in ordinary kitchen microwave oven October 14th, 2014

Bio-inspired 'nano-cocoons' offer targeted drug delivery against cancer cells October 14th, 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