Navigation Links
2 for 1 in solar power
Date:11/17/2013

Solar cells offer the opportunity to harvest abundant, renewable energy. Although the highest energy light occurs in the ultraviolet and visible spectrum, most solar energy is in the infrared. There is a trade-off in harvesting this light, so that solar cells are efficient in the infrared but waste much of the energy available from the more energetic photons in the visible part of the spectrum.

When a photon is absorbed it creates a single electronic excitation that is then separated into an electron and a positively charged hole, irrespective of the light energy. One way to improve efficiency is to split energy available from visible photons into two, which leads to a doubling of the current in the solar cell.

Researchers in Cambridge and Mons have investigated the process in which the initial electronic excitation can split into a pair of half-energy excitations. This can happen in certain organic molecules when the quantum mechanical effect of electron spin sets the initial spin 'singlet' state to be double the energy of the alternative spin 'triplet' arrangement.

The study, published today in the journal Nature Chemistry, shows that this process of singlet fission to pairs of triplets depends very sensitively on the interactions between molecules. By studying this process when the molecules are in solution it is possible to control when this process is switched on.

When the material is very dilute, the distance between molecules is large and singlet fission does not occur. When the solution is concentrated, collisions between molecules become more frequent. The researchers find that the fission process happens as soon as just two of these molecules are in contact, and remarkably, that singlet fission is then completely efficientso that every photon produces two triplets.

This fundamental study provides new insights into the process of singlet fission and demonstrates that the use of singlet fission is a
'/>"/>

Contact: Brian Walker
bjw53@cam.ac.uk
44-758-707-6777
University of Cambridge
Source:Eurekalert  

Page: 1 2

Related biology news :

1. A new dimension for solar energy
2. Folding light: Wrinkles and twists boost power from solar panels
3. Climatic effects of a solar minimum
4. Bay Area PV Consortium announces $7.5 million in grants to lower the cost of large-scale solar
5. Weizmann Institute solar technology to convert greenhouse gas into fuel
6. Anti-aging elixir for solar cells
7. ASU awarded $3 million to research solar energy technologies, launch energy Ph.D. program
8. Microwave ovens may help produce lower cost solar energy technology
9. The George Washington University Researcher received $1.7 million to study solar cement
10. Stanford scientists build the first all-carbon solar cell
11. Rice unveils super-efficient solar-energy technology
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
2 for 1 in solar power
(Date:12/17/2014)... Valencell, a leader in performance biometric data ... industry leaders such as Intel, Jabra, Atlas, and Scosche ... products. These products will be showcased at CES 2015, ... . "Our partners choose PerformTek ... – with the clinical data to back it up," ...
(Date:12/15/2014)... Research and Markets ( http://www.researchandmarkets.com/research/87pph8/global_facial ... "Global Facial Recognition Market 2015-2019" report to ... Facial recognition is a technology ... system measures the overall facial feature of a ... the distance between eyes. Facial recognition is used ...
(Date:12/11/2014)... N.C. , Dec. 10, 2014  That blood pressure ... quite a while. Hypertension – the medical term for high ... the early 1800s, and the inflatable cuff that,s used in ... doesn,t, however, mean there,s nothing new about hypertension, its triggers ... long-held beliefs about the condition and the best ways to ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4
... introduced to regions beyond their native range carry ... are responsible for the loss of natural resources and biodiversity, ... Not all non-native species pose a threat. Scientists around the ... conditions that set the stage for debilitating invaders, like ...
... The Dead Sea, a salt sea without an outlet, ... its high salt content because it increases their buoyancy. ... popular archive that provides a diachronic view of its ... Steinmann-Institute for Geology, Mineralogy and Paleontology at the University ...
... framework to evaluate the risk of resistance for the ... this work: A framework for assessing the risk of ... the Malaria Journal today. Resistance ... is important when developing new medicines for malaria, to ...
Cached Biology News:Losing stream in our battle to predict and prevent invasive species 2Losing stream in our battle to predict and prevent invasive species 3Drastic desertification 2Drastic desertification 3MMV develops framework to assess risk of resistance for antimalarial compounds 2
(Date:12/24/2014)... (PRWEB) December 23, 2014 Pipette.com announces ... their Twitter followers can submit their #HolidayInTheLab pictures for ... their lab mates. , For those struggling to think ... the Pipette.com Holiday in the Lab Contest provides the ... Twitter followers to send pictures of their chemistree, ...
(Date:12/24/2014)... , Dec. 23, 2014 Sigma-Aldrich ... that the waiting period under the Hart-Scott-Rodino Antitrust ... acquisition expired on December 22, 2014, thereby completing ... requirement for the acquisition of the Company by ... antitrust clearance satisfies another condition to closing the ...
(Date:12/22/2014)... 22, 2014   Synthetic Biologics, Inc. ... pathogen-specific therapies for serious infections and diseases, ... today announced positive topline safety and tolerability ... of SYN-004, the Company,s investigational oral beta-lactamase ... difficile (C. difficile) infection, antibiotic-associated diarrhea ...
(Date:12/22/2014)... 22, 2014  ( www.competitivehealth.com ) — Competitive Health ... bill review and advocacy service, has signed an agreement ... Savings discount health services marketplace. 63% of ... than they expected to pay. As part of an ... WellCard Savings is pleased to offer medical bill review ...
Breaking Biology Technology:Major Pipette Distributor Pipette.com Announces their Holiday in the Lab Contest 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 2Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 4Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 5WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2
... FLEMINGTON, N.J. , June 24 Beardsworth Consulting ... as the company,s Scientific Advisor, Oncology and Robert W. Malone , ... , , ... oncology,s respected research leaders with over 20 years of clinical research experience. ...
... HOPKINTON, Mass. , June 25 Caliper Life Sciences, ... services for drug discovery and life sciences research, hosted its 2010 ... and 10. This thought-leadership conference is focused on sharing knowledge, ... leading to the next generation of breakthrough diagnostics and therapies. , ...
... BERLIN , June ... worldwide by 10 to 20 percent per year through ... accelerate R&D and,commercialization in this nascent industry, making it ... market demand. Representatives from,Germany Trade & Invest will be ...
Cached Biology Technology:Alison Martin, MD and Robert W. Malone, MD Join Beardsworth 2Caliper Owners Group Meeting Showcases Critical Role of Biopharma and Academic Researchers for Improving Healthcare and Quality of Life 2Caliper Owners Group Meeting Showcases Critical Role of Biopharma and Academic Researchers for Improving Healthcare and Quality of Life 3Market Demand and Innovation in Germany Propel Industrial Biotechnology Growth 2Market Demand and Innovation in Germany Propel Industrial Biotechnology Growth 3