Navigation Links
NREL reports 31.1 percent efficiency for III-V solar cell
Date:6/25/2013

teiner, John Geisz, Ivn Garca and the III-V multijunction PV group have implemented new approaches providing a substantial improvement over NREL's previous results."

"Historically, scientists have bumped up the performance of multijunction cells by gradually improving the material quality and the internal electrical properties of the junctions -- and by optimizing variables such as the bandgaps and the layer thicknesses," NREL Scientist Myles Steiner said. But internal optics plays an underappreciated role in high-quality cells that use materials from the third and fifth columns of the periodic tables the III-V cells. "The scientific goal of this project is to understand and harness the internal optics," he said.

When an electron-hole pair recombines, a photon can be produced, and if that photon escapes the cell, luminescence is observed that is the mechanism by which light-emitting diodes work. In traditional single-junction gallium-arsenide cells, however, most of the photons are simply absorbed in the cell's substrate and are lost. With a more optimal cell design, the photons can be re-absorbed within the solar cell to create new electron-hole pairs, leading to an increase in voltage and conversion efficiency. In a multijunction cell, the photons can also couple to a lower bandgap junction, generating additional current, a process known as luminescent coupling.

The NREL researchers improved the cell's efficiency by enhancing the photon recycling in the lower, gallium-arsenide junction by using a gold back contact to reflect photons back into the cell, and by allowing a significant fraction of the luminescence from the upper, GaInP junction to couple into the GaAs junction. Both the open-circuit voltage and the short-circuit current were increased.

Silicon solar cells now dominate the world PV market, but researchers see opportunities for new materials. High-efficiency concentrator cells bolstered by lenses that magnify the po
'/>"/>

Contact: David Glickson
david.glickson@nrel.gov
303-275-4097
DOE/National Renewable Energy Laboratory
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2013
2. DNA Sequencing Market 2013 Developments & 2016 Product Forecasts in New Research Reports at ReportsnReports.com
3. Z Trim Holdings Reports Continued Sales Growth in May 2013
4. GW Pharmaceuticals plc Reports 2013 Second Quarter Financial Results
5. CTI Reports Final Results from Cooperative Group and NCI-Sponsored Trial of Brostallicin in Patients with Metastatic Triple-Negative Breast Cancer
6. Kinase Market Profiling - In House & Outsourced Trends 2015 Forecast in New Research Report at ReportsnReports.com
7. Insero Health Reports Positive Data on Phase I Trial of Novel Therapy for Drug-resistant Epilepsy
8. Vermillion Reports First Quarter 2013 Results
9. Dyadic International Reports First Quarter 2013 Financial Results
10. Neuralstem Reports First Quarter Financial Results And Provides Business And Clinical Update
11. Inovio Pharmaceuticals Reports 2013 First Quarter Financial Results
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/24/2014)... Your cell phone may stay charged ... storage capacity. , New research indicates that lithium-ion ... at Lawrence Livermore National Laboratory and ... components will perform as electrodes. , The growing ... for higher-performance batteries. Several key characteristics of lithium-ion ...
(Date:7/24/2014)... 2014 2014 Deep Research Report ... a professional and in-depth research report on Potassium ... basic information, including its definition, classification, application, ... research covers the international market analysis, including China’s ... covering macroeconomic environment & economic situation analysis, the ...
(Date:7/24/2014)... 24, 2014 The first part of ... in First in Human Studies” will cover comprehensive clinical ... decisions. , With increasing R&D costs and declining industry ... to maximize the knowledge collected in early Phase I/IIa ... success in late stage development. , Next, the presenters ...
(Date:7/24/2014)... As part of the long-term strategic approach, ... region during 2014 with potential global expansion. , "We ... DZS to manage our clinical trials globally and in ... R&D and President of SBI pharmaceuticals MENA, Dr. Riyadh ... a focus on utilizing eClinical software and flexible team ...
Breaking Biology Technology:Getting More Life out of Lithium-ion Batteries 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 4Best Practices for Optimizing Dose Escalation in First in Human Studies, New Webinar August 6th Hosted by Xtalks 2SBI Pharmaceuticals Co. Ltd. Enters into Preferred Provider Agreement with DZS Clinical Services 2
... Mano Receive 2008 JCA-Mauvernay Award, LAUSANNE, ... global biopharmaceutical development specialist that,focuses on serious ... Ichijo and Hiroyuki Mano with the 2008 ... research work in oncology.,The Awards were presented ...
... Preclinical Animal Data Demonstrates Selective Survival Advantage of ... Reduced Viral Loads, WASHINGTON and RICHMOND, Calif., ... ) announced today the presentation,of data demonstrating that ... HIV infection by treatment with zinc finger DNA-binding,protein ...
... Growth in Core ... Clinical Business, SUNNYVALE, Calif., Oct. 28 ... of $44.9,million, an increase of 24% over the third quarter of fiscal ... revenue of $36.3,million and a net loss of $4.7 million, or $(0.09) ...
Cached Biology Technology:Japanese Cancer Association and Debiopharm Honour Japanese Research 2Japanese Cancer Association and Debiopharm Honour Japanese Research 3Sangamo BioSciences Presents Data at ICAAC Demonstrating 'In Vivo' Protection Against HIV Infection by CCR5-ZFN Therapeutic 2Sangamo BioSciences Presents Data at ICAAC Demonstrating 'In Vivo' Protection Against HIV Infection by CCR5-ZFN Therapeutic 3Sangamo BioSciences Presents Data at ICAAC Demonstrating 'In Vivo' Protection Against HIV Infection by CCR5-ZFN Therapeutic 4Sangamo BioSciences Presents Data at ICAAC Demonstrating 'In Vivo' Protection Against HIV Infection by CCR5-ZFN Therapeutic 5Cepheid Reports Third Quarter Revenue of $44.9 Million 2Cepheid Reports Third Quarter Revenue of $44.9 Million 3Cepheid Reports Third Quarter Revenue of $44.9 Million 4Cepheid Reports Third Quarter Revenue of $44.9 Million 5Cepheid Reports Third Quarter Revenue of $44.9 Million 6Cepheid Reports Third Quarter Revenue of $44.9 Million 7Cepheid Reports Third Quarter Revenue of $44.9 Million 8Cepheid Reports Third Quarter Revenue of $44.9 Million 9Cepheid Reports Third Quarter Revenue of $44.9 Million 10Cepheid Reports Third Quarter Revenue of $44.9 Million 11Cepheid Reports Third Quarter Revenue of $44.9 Million 12Cepheid Reports Third Quarter Revenue of $44.9 Million 13
(Date:7/24/2014)... biodiversity and one of the most species richness biome ... However, current levels of diversity might be still underestimated. ... in the description of new endemic species of this ... availability of samples for DNA analysis. , Using ... morphological analysis, researchers from the University of Richmond ...
(Date:7/24/2014)... life arose have been maintained in our cells today according ... published today in the Journal of Biological Chemistry ... in animals still perform ancient reactions thought to have been ... years ago. , The primordial soup theory suggests that life ... the combination of metals, gases from the atmosphere and some ...
(Date:7/24/2014)... This news release is available in German . ... much welcomed in Norway and they are a common sight ... so that electric cars topped the list of new vehicle ... to the situation in Germany, where electric vehicles claim only ... cars on the roads in Germany, only a mere 8000 ...
Breaking Biology News(10 mins):A tiny new species of frog from Brazil with a heroic name 2Nano-supercapacitors for electric cars 2Nano-supercapacitors for electric cars 3
... and China has produced a first draft of the papaya ... of the plants gene coding sequence, sheds new light on ... genetically modified plant, the newly sequenced papaya genome offers the ... the plant resistant to the papaya ringspot virus. The ...
... with good oral health could become the first tool ... to periodontal disease treatments, say researchers at the University ... called HtpG, the bug that makes it is Porphyromonas ... also has potential as a vaccine candidate, according to ...
... the University Hospital of Magdeburg (Germany) have discovered ... and oxidative stress followed by the activation of ... target gene expression in atrial tissue. Their study ... Experimental Biology and Medicine. Multiple tachycardia-associated factors appear ...
Cached Biology News:First draft of transgenic papaya genome yields many fruits 2First draft of transgenic papaya genome yields many fruits 3Presence of certain antibodies signals healthier teeth and gums 2Mitochondrial dysfunction and redox signaling in atrial tachyarrhythmia 2
ANTI CORTIS BIN GLOB...
MOUSE ANTI BOVINE WC1:FITC Immunogen: Bovine lymphocytes...
ANTI S. ENTERID LPS...
... This DuoSet ELISA Development kit contains ... of sandwich ELISAs to measure natural and ... and serum. Each kit contains sufficient materials ... plates, provided that the following conditions are ...
Biology Products: