Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > ALD to Enable Novel, High Efficiency Silicon Nanorod Solar Cells

Abstract:
Picosun Oy, Finland-based global manufacturer of state-of-the-art Atomic Layer Deposition (ALD) equipment, reports successful final results of the European Union 7th Framework Programme funded research project ROD-SOL. The goal of this multinational, inter-European, three years (2009-2011) project combining the efforts of both scientific and industrial partners has been to dramatically increase the efficiency of solar cells and reduce the costs of their manufacturing. This has been achieved with novel, innovative, silicon nanorod based concept. The amount of active photovoltaic material (Si) can be significantly reduced by growing the light-trapping nanorod "forests" (thickness from < 1́m to a few ́m at most) on cheaper substrates such as glass or flexible foils. This has led to already promising over 9 % energy conversion efficiencies with very good long-term stabilities of cells. Due to their effectively 3D geometry, the nanorod forests have high active surface area which enables efficient light absorption - much more efficient than in convenient 2D thin film solar cells. Also, the location of the p-n junction much closer to the surface than in normal solar cells radically improves the minority carrier charge transport and thus the amount of electricity that can be extracted from the cell.

ALD to Enable Novel, High Efficiency Silicon Nanorod Solar Cells

Espoo, Finland | Posted on January 2nd, 2012

Due to the micrometer/sub-micrometer dimensions of the nanorod forests (dense packing, rod diameters typically few hundreds of nm and lengths < 1 ́m) ALD has proven to be ideal technique for manufacturing some of the most crucial cell components. To prevent recombination losses in the active photovoltaic layer and thus cell efficiency decrease, a recombination barrier i.e. passivation layer needs to be coated on the rods' surface. An ultrathin ALD-deposited Al2O3 film serves ideally this purpose, and the gas-phase, surface-controlled and self-limiting nature of the ALD process ensures that even the deepest and narrowest between-the-rods nooks and crannies will be reliably covered with 100 % uniform, conformal and pinhole- and defect-free passivation film. Another central cell component where ALD has shown its indispensability is the transparent conductive oxide (TCO) layer that works as the current collector on the top of the cell. Different TCO deposition methods were
investigated in the course of the project, and ALD turned out to be the ideal method regarding both the TCO film quality and the scalability of the technique, due to Picosun's fast, efficient and easy-to-use HVM (High Volume Manufacturing) batch ALD system, which was developed specifically during the project ROD-SOL.

"Solar photovoltaics still remains one of the fastest growing industries in the world. To enable more efficient utilization of this free, clean energy, the efficiencies of the solar cells have to increase and their manufacturing costs decrease. ROD-SOL's silicon nanorod cell concept shows promising potential to this, and we at Picosun have been especially satisfied of the ALD's central role in realizing this novel, innovative, high efficiency solar electricity converter", states Picosun's Managing Director Juhana Kostamo.

####

About Picosun Oy
Picosun Oy is Finnish, globally operating manufacturer of state-of-the-art ALD systems, representing continuity to almost four decades of dedicated, exclusive ALD reactor design and manufacturing. Picosun’s global headquarters are located in Espoo, Finland, its production facilities in Masala, Kirkkonummi, and its US headquarters in Detroit, Michigan. PICOSUN™ ALD tools are chosen for production by various industries across four continents. Picosun Oy is a part of Stephen Industries Inc. Oy.

For more information, please click here

Contacts:
Mr. Juhana Kostamo
Phone: +358 50 321 1955
Fax: +358 9 297 6116

Copyright © Picosun Oy

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

MRI, on a molecular scale: Researchers develop system that could one day peer into the atomic structure of individual molecules April 20th, 2014

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

Innovative strategy to facilitate organ repair April 18th, 2014

Govt.-Legislation/Regulation/Funding/Policy

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

Innovative strategy to facilitate organ repair April 18th, 2014

Novel stapled peptide nanoparticle combination prevents RSV infection, study finds April 17th, 2014

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Announcements

MRI, on a molecular scale: Researchers develop system that could one day peer into the atomic structure of individual molecules April 20th, 2014

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

Innovative strategy to facilitate organ repair April 18th, 2014

Tools

MRI, on a molecular scale: Researchers develop system that could one day peer into the atomic structure of individual molecules April 20th, 2014

Oxford Instruments Asylum Research Introduces the MFP-3D InfinityTM AFM Featuring Powerful New Capabilities and Stunning High Performance April 18th, 2014

More effective kidney stone treatment, from the macroscopic to the nanoscale April 17th, 2014

Aerotech X-Y ball-screw stage for economical high performance Planar positioning April 16th, 2014

Energy

High-temperature plasmonics eyed for solar, computer innovation April 17th, 2014

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Engineers develop new materials for hydrogen storage April 15th, 2014

A molecular approach to solar power: Switchable material could harness the power of the sun — even when it’s not shining April 15th, 2014

Solar/Photovoltaic

High-temperature plasmonics eyed for solar, computer innovation April 17th, 2014

A molecular approach to solar power: Switchable material could harness the power of the sun — even when it’s not shining April 15th, 2014

Shiny quantum dots brighten future of solar cells: Photovoltaic solar-panel windows could be next for your house April 14th, 2014

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