Navigation Links
Nanopillars promise cheap, efficient, flexible solar cells
Date:7/9/2009

BERKELEY, CA Researchers at the U.S. Department of Energy's Lawrence Berkeley National Laboratory and the University of California at Berkeley have demonstrated a way to fabricate efficient solar cells from low-cost and flexible materials. The new design grows optically active semiconductors in arrays of nanoscale pillars, each a single crystal, with dimensions measured in billionths of a meter.

"To take advantage of abundant solar energy we have to find ways to mass-produce efficient photovoltaics," says Ali Javey, a faculty scientist in Berkeley Lab's Materials Sciences Division and a professor of electrical engineering and computer science at UC Berkeley. "Single-crystalline semiconductors offer a lot of promise, but standard ways of making them aren't economical."

A solar cell's basic job is to convert light energy into charge-carrying electrons and "holes" (the absence of an electron), which flow to electrodes to produce a current. Unlike a typical two-dimensional solar cell, a nanopillar array offers much more surface for collecting light. Computer simulations have indicated that, compared to flat surfaces, nanopillar semiconductor arrays should be more sensitive to light, have a greatly enhanced ability to separate electrons from holes, and be a more efficient collector of these charge carriers.

"Unfortunately, early attempts to make photovoltaic cells based on pillar-shaped semiconductors grown from the bottom-up yielded disappointing results. Light-to-electricity efficiencies were less than one to two percent," says Javey. "Epitaxial growth on single crystalline substrates was often used, which is costly. The nanopillar dimensions weren't well controlled, pillar density and alignment was poor, and the quality of the interface between the semiconductors was poor."

Javey devised a new, controlled way to use a method called the "vapor-liquid-solid" process to make large-scale modules of dense, highly ordered arrays
'/>"/>

Contact: Paul Preuss
paul_preuss@lbl.gov
510-486-6249
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. New Study Shows Promise for Hydrogen Sulfide in Reducing Heart-Attack Damage, Ikaria Announces
2. New nanostructured thin film shows promise for efficient solar energy conversion
3. Phase 1 Studies Show Promise of QuatRxs Novel Compound, Sobetirome, for Lowering LDL Cholesterol Levels
4. New Robotic Imaging Technology Holds Promise of Improved Cancer Care
5. Nanoemulsion vaccines show increasing promise
6. NIST/NIH micromagnets show promise as colorful smart tags for magnetic resonance imaging
7. Nano-sized electronic circuit promises bright view of early universe
8. Telescope Embedded in Spectacle Lens Promises to Make Driving Easier for Visually Impaired
9. New carbon material shows promise of storing large quantities of renewable electrical energy
10. New research field promises radical advances in optical technologies
11. Cord Blood America Salutes President-Elect Obamas Promise to Lift Restrictions on Stem Cell Research
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nanopillars promise cheap, efficient, flexible solar cells
(Date:9/2/2014)... MA (PRWEB) September 02, 2014 ... today the signage of a distribution agreement with ... is now distributing Myriant’s bio-succinic acid in the ... and Ireland, targeting customers in the industrial and ... distribution powerhouse, Azelis offers a far-reaching chemical portfolio ...
(Date:9/2/2014)... Inc. (Nasdaq: ONTY ) announced today that ... present at the Rodman & Renshaw 16 th Annual ... on Tuesday, Sept. 9, 2014 at 2:05 p.m. Eastern. ... will be accessible by visiting the Oncothyreon website www.oncothyreon.com ... About Oncothyreon Oncothyreon is a biotechnology company ...
(Date:9/2/2014)... 2014  Spherix Incorporated (SPEX) -- an intellectual property development company ... today announced that the United States Patent & Trademark ... the month of August that are part of a ... issued patents are: , U.S.RE45,065 issued ... 2014; and , U.S.RE45,095 issued August 26, 2014.  ...
(Date:9/1/2014)... The global oligonucleotide synthesis market is expected ... million in 2014, growing at a CAGR of ... synthesis market is categorized on the basis of ... The synthesized oligonucleotides segment is expected to register ... market during the forecast period, owing to an ...
Breaking Biology Technology:Myriant and Azelis Sign European Distribution Agreement for Bio-Succinic Acid 2United States Patent & Trademark Office Issues Three New Standard Essential Patents to Spherix 29.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 29.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 39.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 49.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 5
... Mass., Sept. 19 Boston Scientific,Corporation (NYSE: BSX ... Life,Sciences Conference, which is being held September 22 - ... Chief Executive Officer, will make a,30-minute presentation which will ... Thursday, September 25, beginning at approximately 9:00,a.m. ET., ...
... PARK, Ill., Sept. 19 Abbott (NYSE:,ABT) will announce ... before the market opens., The announcement will be ... at 8 a.m. Central time (9 a.m. Eastern), and ... http://www.abbottinvestor.com . An archived edition of the call will ...
... China, Sept. 19 /Xinhua-PRNewswire-FirstCall/ --,China-Biotics, Inc. (OTC ... Chinese firm specializing in the manufacture,research, development, ... that at its 2008 Annual General Meeting ... the Company,s nominees to the,Board of Directors., ...
Cached Biology Technology:China-Biotics, Inc. Announces Results of 2008 Annual General Meeting of Shareholders 2
(Date:9/2/2014)... distribution of media will have lower carbon emissions ... file sizes are large. , That,s the conclusion ... of Industrial Ecology that looked at the ... PlayStation3. Researchers found that Blu-ray Discs delivered via ... game files downloaded over broadband Internet. For their ...
(Date:9/2/2014)... New research suggests that professional baseball pitchers with poor core ... in a single season because of injury than are pitchers ... and pelvis. , In the study, 347 pitchers were assessed ... in their pelvis as they raised a leg to step ... at least 30 days cumulative, not consecutive during ...
(Date:9/2/2014)... new study published in the September issue of ... identifies a novel strategy to diagnose the leading ... irreversible structural damage has occurred. This advance involves ... on the endothelium of retinal vessels. Using new ... distinguish the early molecular development of diabetic retinopathy. ...
Breaking Biology News(10 mins):In pro baseball pitchers, weak core linked to more missed days 2In pro baseball pitchers, weak core linked to more missed days 3Molecular probes permit doctors to detect diabetic retinopathy before vision fails 2
... for hundreds of years as an herbal remedy to prevent ... commonly used herbal medicines in North America. However, in spite ... on the body,s immune system are conflicting. ... University Indianapolis are investigating the possibility that Echinacea has other ...
... 20 million people in the U.S., and many more worldwide, ... developing mesothelioma, a malignant cancer of the membranes that cover ... Moreover, asbestos exposure increases the risk of lung cancer among ... understand why asbestos causes cancer. The answer ...
... Tuesday 29 June 2010, announces this year,s award winners ... to theoretical physicist Professor Edward Witten for outstanding, transformative ... influential physicists of the past 30 years, he has ... particle physics and cosmology to theoretical areas of string ...
Cached Biology News:Mystery unraveled: How asbestos causes cancer 2IOP announces 2010 award winners 2