Navigation Links
Popcorn-ball design doubles efficiency of dye-sensitized solar cells
Date:4/10/2008

A new approach creates a dramatic improvement in cheap solar cells now being developed in laboratories.

By using a popcorn-ball design tiny kernels clumped into much larger porous spheres researchers at the University of Washington are able to manipulate light and more than double the efficiency of converting solar energy to electricity. The findings will be presented today in New Orleans at the national meeting of the American Chemical Society.

"We think this can lead to a significant breakthrough in dye-sensitized solar cells," said lead author Guozhong Cao, a UW professor of materials science and engineering.

Dye-sensitized solar cells, first popularized in a scientific article in 1991, are more flexible, easier to manufacture and cheaper than existing solar technologies. Researchers have tried various rough surfaces and achieved higher and higher efficiencies. Current lab prototypes can convert just over one tenth of the incoming sun's energy into electricity. This is about half as efficient as the commercial, silicon-based cells used in rooftop panels and calculators.

The UW researchers did not attempt to maximize the overall efficiency of a dye-sensitized solar cell to match or beat these previous records. Instead, they focused on developing new approaches and compared the performance of a homogeneous rough surface with a clumping design. One of the main quandaries in making an efficient solar cell is the size of the grains. Smaller grains have bigger surface area per volume, and thus absorb more rays. But bigger clumps, closer to the wavelength of visible light, cause light to ricochet within the thin light-absorbing surface so it has a higher chance of being absorbed.

"You want to have a larger surface area by making the grains smaller," Cao said. "But if you let the light bounce back and forth several times, then you have more chances of capturing the energy."

Other researchers have tried mixi
'/>"/>

Contact: Hannah Hickey
hickeyh@u.washington.edu
206-543-2580
University of Washington
Source:Eurekalert

Page: 1 2

Related biology news :

1. Specially-designed soils could help combat climate change
2. Carnegie Mellon scientists develop fluorescent proteins for live cell imaging, biosensor design
3. Book is the first high-resolution digital mouse brain atlas designed for Web applications
4. HIV isolate from Kenya provides clues for vaccine design
5. Singulex Teams With Wyeth Pharmaceuticals to Translate Pre-Clinical Biomarker Research Into Clinical Study Design
6. Synaptics SecurePad(TM) Selected as CES Innovations 2008 Design and Engineering Award Honoree
7. Researchers successfully simulate photosynthesis and design a better leaf
8. IGERT fellows to design biodevices using flexible electronics
9. Bangladesh to dramatically expand technology that doubles efficiency of urea fertilizer use
10. Fujitsu Combines Capacity, Performance and Power Efficiency Into the Industrys First 320GB 7200 RPM 2.5" Sata Hard Disk Drive
11. EPA and research efficiency
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/31/2014)... bigeye tuna movements in the northwestern Atlantic Ocean led ... Center at the University of Massachusetts Amherst, found among ... range with pronounced north-south movements from Georges Bank to ... off Cape Hatteras southwest of Bermuda for foraging. , ... study one of the most important commercial tuna species ...
(Date:7/31/2014)... Science Foundation (NSF), counters a widely-held scientific view ... instead that certain Arctic lakes store more greenhouse ... , The study, published this week in the ... which occur as permafrost thaws and creates surface ... what was previously frozen land into lakes. , ...
(Date:7/31/2014)... GAINESVILLE, Fla. --- By tracing nearly 3,000 genes ... moths, University of Florida scientists have created an ... to use large-scale, next-generation DNA sequencing. , ... more closely related to small moths than to ... how butterflies evolved. The study also found that ...
Breaking Biology News(10 mins):Study of bigeye tuna in Northwest Atlantic uses new tracking methods 2Study of bigeye tuna in Northwest Atlantic uses new tracking methods 3Certain Arctic lakes store more greenhouse gases than they release 2UF study advances 'DNA revolution,' tells butterflies' evolutionary history 2UF study advances 'DNA revolution,' tells butterflies' evolutionary history 3
... be complete without mosquitoes nipping at exposed skin. Or ... University team may help solve a problem that scientists ... Kun Yan Zhu, professor of entomology, and teammates ... Jianzhen Zhang, a visiting scientist from Shanxi University, China, ...
... Researchers writing in the open access journal BMC ... an adaptation in the blood of Eastern moles which ... moles, burrowing behavior. Kevin Campbell from the ... researchers to study the blood of three underground species ...
... has developed a "lab on a chip" device for ... white blood cells called T cells that are affected ... the test detects the types and levels of inflammatory ... Revzin,s team collaborated with UCLA electrical engineer Prof. Aydogan ...
Cached Biology News:K-State researchers find gene-silencing nanoparticles may put end to pesky summer pest 2Adaptation in mole blood aids tunnelling 2Novel microfluidic HIV test is quick and cheap 2
(Date:7/31/2014)... 31, 2014 Today BioSpace , the leading life sciences ... campaign spotlighting the life sciences community in Illinois , ... Kansas , Michigan , Minnesota ... Ohio and Wisconsin . ... of all job postings on BioSpace originating in this region in 2013. ...
(Date:7/31/2014)... ability to see through organs and even the entire ... as fine-grained cellular structures has been a long-time dream ... Press July 31st in the journal Cell ... methods for making opaque organs, bodies, and human tissue ... intact. The protocols could pave the way for a ...
(Date:7/31/2014)... According to a new market ... - Global Industry Analysis, Size, Share, Growth, Trends and ... USD 88.5 million in 2011, which is expected to ... CAGR of 53.8% from 2013 to 2023. ... Increasing demand for energy efficient displays ...
(Date:7/31/2014)... 2014 According to a new ... Medical Devices Market (Diagnostic Electrodes - ECG, EEG, EMG, ... Pacemakers, Defibrillators, Electrosurgical and Other Electrodes) - Global Industry ... 2019," the global electrodes market for medical devices was ... estimated to reach a market worth USD 1,451.2 million ...
Breaking Biology Technology:Midwest Biotech Leaders Featured On BioSpace Map 2See-through organs and bodies will accelerate biomedical discoveries 2Global Quantum Dots Market is Expected to Reach USD 8,246.8 Million in 2023: Transparency Market Research 2Global Quantum Dots Market is Expected to Reach USD 8,246.8 Million in 2023: Transparency Market Research 3Global Quantum Dots Market is Expected to Reach USD 8,246.8 Million in 2023: Transparency Market Research 4Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 2Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 3Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 4Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 5Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 6
... BHRT ) a company committed to delivering ... treat heart failure and,cardiovascular diseases, announced the adoption ... -- Shareholders approved the election of eight ... in 2009 or until their successors are,duly elected ...
... July 30 DNA Heritage has recently,overcome patent claims ... use of DNA testing and databases that allow families ... DNA. The patent covers the,use of surnames and Y-chromosomes ... (UK IPO) has now rendered a formal opinion,stating that ...
... ROCKVILLE, Md., July 30 Stem cell ... Dr. Thomas Hazel will be,rejoining the company as ... Dr. Karl Johe, Neuralstem,s Chairman and Chief Science,Officer, ... ALS,(Amytrophic Lateral Sclerosis, or Lou Gehrig,s disease), and ...
Cached Biology Technology:Bioheart, Inc. Announces Results of Annual Meeting 2Bioheart, Inc. Announces Results of Annual Meeting 3Bioheart, Inc. Announces Results of Annual Meeting 4Bioheart, Inc. Announces Results of Annual Meeting 5DNA Heritage Success in Patent Battle Helps Keep Genealogy DNA Test Prices Low 2Neuralstem Fills Key Product Development Position 2
... Receptor (GR) Competitor Assay Kits are ideal ... compounds. The PolarScreen GR Competitor Assay Kits ... buffer, and one of the following proprietary ... kit), GS Red (red assay kit), or ...
... contains enough separation reagents to ... of 5 x 10 8 ... StemSep red magnet and all ... for the specific cell type ...
... Source rat adult and fetal ... $550.00, * T75 plated cells ... * This product requires Celprogen ... M55007-08 and extracellular matrix, * ...
... Tissue Arrays are intended for laboratory research ... fixed in neutral buffered formalin and embedded ... was performed by certified pathologists. Tissue ... and relocated into a new recipient paraffin ...
Biology Products: