Navigation Links
MIT researchers use virus to improve solar-cell efficiency
Date:4/25/2011

n the silicon used in conventional solar cells. But the same technique could be applied to other types as well, including quantum-dot and organic solar cells, the researchers say. In their tests, adding the virus-built structures enhanced the power conversion efficiency to 10.6 percent from 8 percent almost a one-third improvement.

This dramatic improvement takes place even though the viruses and the nanotubes make up only 0.1 percent by weight of the finished cell. "A little biology goes a long way," Belcher says. With further work, the researchers think they can ramp up the efficiency even further.

The viruses are used to help improve one particular step in the process of converting sunlight to electricity. In a solar cell, the first step is for the energy of the light to knock electrons loose from the solar-cell material (usually silicon); then, those electrons need to be funneled toward a collector, from which they can form a current that flows to charge a battery or power a device. After that, they return to the original material, where the cycle can start again. The new system is intended to enhance the efficiency of the second step, helping the electrons find their way: Adding the carbon nanotubes to the cell "provides a more direct path to the current collector," Belcher says.

The viruses actually perform two different functions in this process. First, they possess short proteins called peptides that can bind tightly to the carbon nanotubes, holding them in place and keeping them separated from each other. Each virus can hold five to 10 nanotubes, each of which is held firmly in place by about 300 of the virus's peptide molecules. In addition, the virus was engineered to produce a coating of titanium dioxide (TiO2), a key ingredient for dye-sensitized solar cells, over each of the nanotubes, putting the titanium dioxide in close proximity to the wire-like nanotubes that carry the electrons.

The two functions are carried o
'/>"/>

Contact: Caroline McCall
cmccall5@mit.edu
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Beetle bling: Researchers discover optical secrets of metallic beetles
2. Wild hogs: Researchers examine impact of feral pigs in eastern N.C.
3. Researchers create functioning synapse using carbon nanotubes
4. Researchers find fat turns into soap in sewers, contributes to overflows
5. Researchers combine active proteins with material derived from fruit fly
6. MU researchers find missing link in plant defense against fungal disease
7. New biosensor microchip could speed up drug development, Stanford researchers say
8. Nottingham researchers help bridge the urban and rural divide in the UK and India
9. Researchers discover precisely how thalidomide causes birth defects
10. Researchers get a first look at the mechanics of membrane proteins
11. Jefferson researchers unlock key to personalized cancer medicine using tumor metabolism
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/4/2014)... School of Medicine announced today that it is ... by the Bill & Melinda Gates Foundation. ... and Reproductive Sciences; and Vice Chair of Research ... Medicine will pursue an innovative global health and ... Assess Fetal Neurodevelopment.", Grand Challenges Explorations (GCE) funds ...
(Date:11/4/2014)... examining only marketing directed at children on the ... found that the majority of black, middle-income and ... tactics. , Authored by Arizona State University researcher ... the first to examine the use of child-directed ... food restaurants and its relationship to demographics. It ...
(Date:11/4/2014)... – (Nov. 4, 2014) – A majority of Madagascar,s ... that could have serious consequences for the rainforests they ... shows the positive impacts lemurs can have on rainforest ... their disappearance could have on the region,s rich biodiversity. ... have fruits eaten by lemurs. Lemurs in turn ...
Breaking Biology News(10 mins):Temple University School of Medicine receives Grand Challenges Explorations grant 2Fast food marketing for children disproportionately affects certain communities 2Fast food marketing for children disproportionately affects certain communities 3Gardeners of Madagascar rainforest at risk 2Gardeners of Madagascar rainforest at risk 3
... calls for policymakers to reduce both nitrogen and phosphorus ... problems in fresh and coastal waters. In the ... argue that dual-nutrient reduction strategies are likely to be ... phosphorus in fresh and coastal water ecosystems. "If ...
... 2009 ― Protecting drinking water and preventing harmful ... many lakes, will require reducing both nitrogen and ... to the sea, management strategies should be implemented ... that focus only on one nutrient will fail. ...
... be exhausting. When fruit flies mate, the females, genes ... an immune reaction starts. This is shown in a ... the scientific publication, Journal of Evolutionary Biology .* ... genomic technology, so-called microarrays, researchers at Uppsala University can ...
Cached Biology News:Nutrient pollution chokes marine and freshwater ecosystems 2
(Date:11/21/2014)... 20, 2014 Polaris Group announced today ... its Phase 1 trial of ADI-PEG 20 in ... of malignant pleural mesothelioma (MPM) and non-squamous non-small ... trials on ADI-PEG 20, both as monotherapy and ... of several other indications, including breast cancer, melanomas, ...
(Date:11/18/2014)... , Nov. 18, 2014 Cord Blood Registry® ... of the 10th Annual World Stem Cell Summit, the largest ... The 2014 World Stem Cell Summit will be held December ... Texas . The World Stem ... of lifesaving cures and therapies, convening the most prominent figures ...
(Date:11/18/2014)... 17, 2014 Athena Signature Series: Turning Cancer ... Beverly Emerson, a professor in the Regulatory Biology Laboratory at ... recent discovery points to an “off switch” for drug resistance ... how her local research is making a global impact in ... and then join host Cheryl K. Goodman, CEO of Social ...
(Date:11/18/2014)... Texas (PRWEB) November 18, 2014 ... Polytetrahydrofuran (PTMEG) Industry is professional and in-depth ... gives Polytetrahydrofuran basic information, including its definition, ... also industry outline. This exploration covers the ... and worldwide industry examination covering macroeconomic environment ...
Breaking Biology Technology:Polaris Group Announces Treatment of First Patient in Phase 1 Study of ADI-PEG 20 plus Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma And Non-Squamous Non-Small Cell Lung Carcinoma 2Cord Blood Registry Sponsors 2014 World Stem Cell Summit 2Cord Blood Registry Sponsors 2014 World Stem Cell Summit 3PTMEG Market: 2019 Global Polytetrahydrofuran Industry Development Trends & Analysis Now at DeepResearchReports.com 2PTMEG Market: 2019 Global Polytetrahydrofuran Industry Development Trends & Analysis Now at DeepResearchReports.com 3
... Multiporator , , , , , , , , ... Protocol No. 4308 915.029 11/1999 , , , , , ... , Cell line , 293 T, human embryonal kidney, ... Plasmid pEGFP-N1 (in bidistilled H 2 O), , ...
... , , , , Multiporator / Electroporator 2510 , , , , ... Transformation Protocol , Protocol No. 4308 915.541 03/2002 , ... , , , , ... , Cell type , Bacteria, gram positive, ...
... Electroporator 2510 , , , , , , , , ... Protocol No. 4308 915.534 01/2002 , , , , ... , Microorganism , Staphylococcus epidermidis, ... Bacteria, gram positive, , , ...
Cached Biology Technology:293 T 2Streptococcus salivarius 2Staphylococcus epidermidis 2
... sufficient materials for 1,464 array sample elements. , , ... , Blocker BSA in PBS (10X): 50 ml ... BupH Phosphate Buffered Saline: 8 packs , 10% ... Pico Luminol Enhancer: 2 x 25 ml , SuperSignal ...
... The Partec Cell Counter Analyser counts cells ... the CCA detects only cells, so that ... the results.,While passing through a 250 m ... fluorescence light signal which is used as ...
... Obtain Clean and Accurate Results ... dramatically increase the sensitivity and accuracy of ... homogeneous cell types and multi-cellular structures isolated ... unique approach to microdissection-developed in 1996 at ...
Mouse monoclonal antibody raised against a partial recombinant DHX8. NCBI Entrez Gene ID = DHX8...
Biology Products: