Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

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

Dartmouth team creates new method to control quantum systems May 24th, 2016

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Nanoscale Trojan horses treat inflammation May 24th, 2016

Programmable materials find strength in molecular repetition May 23rd, 2016

Chip Technology

Dartmouth team creates new method to control quantum systems May 24th, 2016

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Physicists create first metamaterial with rewritable magnetic ordering May 23rd, 2016

Graphene: Progress, not quantum leaps May 23rd, 2016

Nanoelectronics

Researchers demonstrate size quantization of Dirac fermions in graphene: Characterization of high-quality material reveals important details relevant to next generation nanoelectronic devices May 20th, 2016

Graphene: A quantum of current - When current comes in discrete packages: Viennese scientists unravel the quantum properties of the carbon material graphene May 20th, 2016

New type of graphene-based transistor will increase the clock speed of processors: Scientists have developed a new type of graphene-based transistor and using modeling they have demonstrated that it has ultralow power consumption compared with other similar transistor devices May 19th, 2016

Self-healing, flexible electronic material restores functions after many breaks May 17th, 2016

Discoveries

Dartmouth team creates new method to control quantum systems May 24th, 2016

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Announcements

Dartmouth team creates new method to control quantum systems May 24th, 2016

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Research partnerships

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Mille-feuille-filter removes viruses from water May 19th, 2016

Carnegie Mellon develops bio-mimicry method for preparing and labeling stem cells: Method allows researchers to prepare mesenchymal stem cells and monitor them using MRI May 19th, 2016

The CEA Announces Expanded Collaboration with Intel to Advance Cutting-edge Research and Innovation in Key Digital Areas May 17th, 2016

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







Car Brands
Buy website traffic