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:8/29/2014)... A major challenge before new biotechnology start-up companies, ... Boston-Cambridge, is gaining visibility that can lead to important ... of Boston’s Adult Stem Cell Technology Center, LLC (ASCTC), ... his company an important priority since he started the ... social media marketing campaign launched earlier in ...
(Date:8/28/2014)... Nevada City, CA (PRWEB) August 28, 2014 ... and sanitation products for the food processing industry, is ... conducting a side-by side comparison of the E2 soap ... Q E2 Sanitizing Foam Soap . Hand hygiene ... pathogens in the food processing environment. Six key criteria ...
(Date:8/28/2014)... research platform uses a laser to measure ... stress and heating, an approach likely to ... and batteries., This new technique, called nanomechanical ... and the surface stress of microscale structures ... the merits of surface-stress influence on mechanical ...
(Date:8/28/2014)... August 28, 2014 The ability for ... culture that will allow individuals to perform at the ... important for employers looking to compete in this post–recession ... embracing this trend, as the sector increasingly focuses on ... company, which will have real results on the organization's ...
Breaking Biology Technology:The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4Best Sanitizers, Inc. Asks Food Industry Professionals: With Fall Harvest On the Way, Is Your E2 Hand Soap Up to the Task? 2New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 3
... Feb. 11 Scientists engaged in biological research and ... 2009 lab budgets. BioInformatics, LLC ( www.gene2drug.com ), ... science market, has released preliminary data from the company,s ... Strategies for Life Science Suppliers. In this report, ...
... Ferring Research Institute Introduce New Research Base and ... DiegoSAN DIEGO, Feb. 11 Leading global biopharmaceutical ... Institute have opened a new and expanded, 38,000-square-foot ... will be dedicated to further development of peptide ...
... LA JOLLA, Calif., Feb. 11 Cordex Pharma, Inc. ... a Medical Advisory Board to provide clinical guidance for ... of heart failure.The Medical Advisory Board will play an ... the planned CDP-1050 Phase 2 clinical trial and assist ...
Cached Biology Technology:Life Science Labs Reacting to the Economic Crisis 2Global Biopharmaceutical Leader in Peptide Research Expands Commitment in San Diego/U.S. With New R&D Facility and Ready-To-Market Prostate Cancer Treatment Degarelix 2Global Biopharmaceutical Leader in Peptide Research Expands Commitment in San Diego/U.S. With New R&D Facility and Ready-To-Market Prostate Cancer Treatment Degarelix 3Global Biopharmaceutical Leader in Peptide Research Expands Commitment in San Diego/U.S. With New R&D Facility and Ready-To-Market Prostate Cancer Treatment Degarelix 4Cordex Pharma Forms Heart Failure Medical Advisory Board 2Cordex Pharma Forms Heart Failure Medical Advisory Board 3Cordex Pharma Forms Heart Failure Medical Advisory Board 4Cordex Pharma Forms Heart Failure Medical Advisory Board 5
(Date:8/28/2014)... PAUL (August 28, 2014) Researchers at the University ... facioscapulohumeral muscular dystrophy (FSHD) to be used for muscle ... of potential therapies for FSHD. , The research is ... Cell Reports . , There is no treatment for ... most common type of muscular dystrophy. FSHD is an ...
(Date:8/28/2014)... 28, 2014  Privacy Advocate and Senior Staff Attorney ... , joins the lineup of biometric and mobile commerce ... UnPlugged Executive Summit in Tampa, Florida ... announced speakers include Steven Rahman, Director, Technology and Strategy at ... Experian. The theme of this year,s event is Mobility ...
(Date:8/28/2014)... new method for measuring and imaging how quickly blood ... better understand how drug abuse affects the brain, which ... and lead to better treatment options for recovering drug ... researchers from Stony Brook University in New York, USA ... today in The Optical Society,s (OSA) open-access journal ...
Breaking Biology News(10 mins):UMN researchers find animal model for understudied type of muscular dystrophy 2Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2This is your brain's blood vessels on drugs 2This is your brain's blood vessels on drugs 3
... Consumption of foods high in carbohydrates immediately after birth ... University at Buffalo animal study has found, even if caloric ... The research on laboratory animals was published this month ... ; it was published online in December. "This is ...
... Braconidae are known for their deadly reproductive habits. Most ... in other insects and their larvae, eventually killing the respective ... sterility. Three new species of the parasitoid wasp genus ... Hymenoptera Research , reflect this fatal behavior. Two ...
... Trademark Office today awarded St. Jude Children,s Research Hospital ... compositions for genetically modifying human immune cells so they ... cancer in children and adults. "This ... attack certain cells that cause leukemia and lymphoma, cancers ...
Cached Biology News:High-carb intake in infancy has lifelong effects, UB study finds 2High-carb intake in infancy has lifelong effects, UB study finds 3Kill Bill character inspires the name of a new parasitoid wasp species 2St. Jude Children's Research Hospital announces issuance of US patent for cancer therapy 2
15(S)-HEDE is produced from 11Z,14Z-eicosadienoic acid by 15-LO. 15(S)-HEDE is an inhibitor of RBL-1 cell 5-LO with an IC50 value of 26 µM....
Mouse monoclonal [HYB 232-02] to Protein S ( Abpromise for all tested applications). entrezGeneID: 5627 SwissProtID: P07225...
Simple operation and an easy-to-read LCD display characterize our Classic Light balances. * Taring range 0...1510 g...
... SLi 3 •3H 2 O Formula Weight: 881.42 ... pH 7.0): greater than or equal to 90% lambda max : 259 ... Spectral Ratios: A 232 /A 260 : 0.51 ... 280 /A 260 : 0.17 0.02 Storage: -20C ...
Biology Products: