Navigation Links
Special coating greatly improves solar cell performance
Date:2/22/2008

tilizes a layer consisting of a mixture of a semiconducting polymer (an electron donor) and a fullerene (an electron acceptor) sandwiched between two electrodes -- one a transparent electrically conducting electrode (the anode, which is usually a tin-doped indium oxide) and a metal (the cathode), such as aluminum.

When light enters through the transparent conducting electrode and strikes the light-absorbing polymer layer, electricity flows due to formation of pairs of electrons and holes that separate and move to the cathode and anode, respectively. These moving charges are the electrical current (photocurrent) generated by the cell and are collected by the two electrodes, assuming that each type of charge can readily traverse the interface between the polymer-fullerene active layer and the correct electrode to carry away the charge -- a significant challenge.

The Northwestern researchers employed a laser deposition technique that coats the anode with a very thin (5 to 10 nanometers thick) and smooth layer of nickel oxide. This material is an excellent conductor for extracting holes from the irradiated cell but, equally important, is an efficient blocker which prevents misdirected electrons from straying to the wrong electrode (the anode), which would compromise the cell energy conversion efficiency.

In contrast to earlier approaches for anode coating, the Northwestern nickel oxide coating is cheap, electrically homogeneous and non-corrosive. In the case of model bulk-heterojunction cells, the Northwestern team has increased the cell voltage by approximately 40 percent and the power conversion efficiency from approximately 3 to 4 percent to 5.2 to 5.6 percent.

The researchers currently are working on further tuning the anode coating technique for increased hole extraction and electron blocking efficiency and moving to production-scaling experiments on flexible substrates.


'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Vion Pharmaceuticals Holds Special Meeting of Stockholders
2. Cell Therapeutics, Inc. (CTI) Shareholders Authorize Share Increase at Special Meeting of Shareholders
3. Advanced Medical Specialties Joins US Oncology Network
4. Special Stockholders Meeting to Elect Directors Set for March 4, 2008
5. Wedgewood Pharmacy Will Continue to Provide Avastin(R) to Ophthalmologists and Retinal Specialists
6. Georgia Reproductive Specialists is First in Southeast to Offer Pioneering Test of Womens Biological Clock
7. Agennix Receives Special Protocol Assessment Approval from FDA for the Pivotal Trial of Talactoferrin Alfa in First-Line Non-Small Cell Lung Cancer
8. ASH Holds a Special Symposium to Interest High School Students in Biomedical Research
9. ThromboGenics Presents Results of the Vitreomacular Traction Trial (MIVI IIT) at the American Society of Retina Specialists Annual Meeting
10. Delivering Molecular Imaging Solutions Across Clinical Specialties: Siemens Showcases New Technologies at RSNA 2007
11. Jennerex Appoints Bob Ingram Special Advisor and Hires Marty Glick as EVP, Corporate Strategy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)... (PRWEB) December 17, 2014 Gene ... that it has entered into a technology access ... (ADM) to apply DNA2.0’s proprietary protein engineering technology, ... process. , “We are extremely excited that the ... platform. This proprietary bioengineering technology has now ...
(Date:12/17/2014)... SOUTH SAN FRANCISCO, Calif. , Dec. 17, ... positive results of a Phase 2 study evaluating ... for the treatment of patients with severe, chronic ... the current standard of care, including topical steroids ... endpoint was percent change in Visual Analog Scale ...
(Date:12/15/2014)...  GlassesOff Inc. (OTCBB: GLSO) announced today the appointment ... director of the Company,s Board of Directors. ... its CEO until its acquisition by Stanley Black ... Recognized as the inventor of the first Wi-Fi-based Active ... -based RFID solutions focused on improving operational efficiency, safety ...
(Date:12/13/2014)... (PRWEB) December 12, 2014 Clarassance, a ... announced its new name: Therabron Therapeutics , Inc. ... and bronchioles (a type of structure in the lungs ... company’s mission to develop novel protein therapeutics for the ... directors decided to change the name to mark the ...
Breaking Biology Technology:ADM and DNA2.0 Enter Into Protein Engineering Technology Access and Service Agreement 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4AeroScout Founder Joins GlassesOff's Board of Directors 2AeroScout Founder Joins GlassesOff's Board of Directors 3Maryland-based Biotech Company's Path Forward in Treating Respiratory Diseases Sparks Name Change 2
... March 17 Spiral Biotech, an Advanced Instruments ... Plating System -- which delivers faster cycle ... that boost processing speed and efficiency in microbiology ... (ASM) General Meeting in May, 2009."The introduction of ...
... Cardiorobotics, Inc., a medical device ... a wide range of applications, including: medical, industrial, ... Dr. Samuel Straface in the position of President ... Straface has joined Cardiorobotics in this executive leadership ...
... Novavax, Inc. (Nasdaq: NVAX ) today announced that ... a press release to be issued after 8:00 a.m. Eastern ... investor conference call to discuss its financial results at 10:00 ... be hosted by Novavax President and Chief Executive Officer Dr. ...
Cached Biology Technology:Spiral Biotech to Introduce New Autoplate Spiral Plating System at ASM General Meeting in May 2Spiral Biotech to Introduce New Autoplate Spiral Plating System at ASM General Meeting in May 3Cardiorobotics Announces New CEO, PLSG Executive-in-Residence to Lead Company 2Cardiorobotics Announces New CEO, PLSG Executive-in-Residence to Lead Company 3Novavax Announces Release Date of 2008 Fourth Quarter Financial Results and Investor Conference Call 2Novavax Announces Release Date of 2008 Fourth Quarter Financial Results and Investor Conference Call 3
(Date:12/10/2014)... , Dec. 9, 2014  Valencell, a leader ... is seeing a staggering demand from its licensees for ... Company revealed, is not solely coming from fitness and ... well. "A wearable is only as useful ... accuracy is the ultimate driver in long-term mass consumer ...
(Date:12/10/2014)... DIEGO , Dec. 9, 2014 CIE ... collaboration catalyst that provides the connective tissue that enhances ... enabling them to easily share client-level information; earned a ... to expand to organizations serving seniors aging in community ... Diego" partner on December 11 th 4-6p. ...
(Date:12/10/2014)... , December 9, 2014 ... BCARD Platform   ... meeting scheduling solutions for business-to-business (B2B) events, today ... leader in mobile near-field communication (NFC), Bluetooth low ...      (Logo: http://photos.prnewswire.com/prnh/20140612/691055) , Jifflenow will ...
Breaking Biology News(10 mins):Wearable Technology Products Demand Highly Accurate Biometric Technology 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3
... Centers for Disease Control and Prevention (CDC) found that ... age of menarche and total number of lifetime ovulatory ... the course of a woman,s lifetime may influence the ... study are published in Cancer Epidemiology, Biomarkers & ...
... new review article appearing in Environmental Health ... a research associate for the Project on Emerging ... for environmental cleanup. It provides an overview ... environment, health, and safety implications; and possible future ...
... history is filled with several turning points when temperatures ... came and disappeared. But one of the biggest moments ... roughly 540 million years ago, when complex, multi-cellular life ... scientists can pinpoint this pivotal period as leading to ...
Cached Biology News:2 reproductive factors are important predictors of death from ovarian cancer 22 reproductive factors are important predictors of death from ovarian cancer 3Contaminated site remediation: Are nanomaterials the answer? 2Explosive growth of life on Earth fueled by early greening of planet 2Explosive growth of life on Earth fueled by early greening of planet 3
... EPS 3501 XL Power Supply, 1. 3500 ... constant current, constant power, and linear voltage ... to focused equilibrium in IPG strips quickly ... compensate for variations in gel thickness, sample ...
...
Request Info...
... ESGRO Complete Derivation Kit is intended ... cells from delayed blastocysts in serum-free ... Clonal Grade ... Blastocyst Incubation Medium Trypsin Solution ...
Biology Products: