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:7/3/2015)... ... July 03, 2015 , ... The Alexander Group, a 30-year ... industries alike-- typically known for its consummate professionalism-- embarks each year in a ... break from their day jobs. , "Our motto has always been work hard ...
(Date:7/3/2015)... 2015 Forskare kan ... på  http://www.openinnovationinscience.at till det återkommande utbildningsprogrammet ... hålls i Wien .  ... internationella forskare och vetenskapsmän som genomfördes av ... största utmaningar bristen på incitament för att ...
(Date:7/3/2015)...  Pomerantz LLP announces that a class action lawsuit ... the "Company")(NYSE: PBYI ) and certain of its ... Court, Central District of California , ... class consisting of all persons or entities who purchased ... 2015 inclusive (the "Class Period").  This class action seeks ...
(Date:7/2/2015)... ... ... been used in countless labs for decades. In the past, people had to go ... this was a daunting and tiring process looking at endless data tables and charts. ... the complex catalog structure. , Now thanks to FireflySci, scientists are throwing away those old ...
Breaking Biology Technology:The Alexander Group Declares Their Independence with a Bit of Levity 2Lansering av världens första program för öppen innovation för att utbilda forskare 2Lansering av världens första program för öppen innovation för att utbilda forskare 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 2SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 4New Cuvette E-Commerce Website Launched by FireflySci 2
... treatment for the underlying process not just the ... Governor's Business Plan Contest on Tuesday, receiving a ... a University of Wisconsin-Madison spinoff, emerged as an early ... judges. Even before that, co-founder Jeff Johnson, the professor ...
... eleventh-annual and largest-ever Venture Forum was held two weeks ... 130 technology companies to an audience of several hundred ... be of particular interest to Midwest technology entrepreneurs as ... too. , ,The forum is organized by the Larta ...
... State Senator Ted Kanavas remains optimistic that his ... pass the legislature yet this year. , ... Representative Jeff Fitzgerald, R-Horicon, would require companies that ... notify those people when that data is obtained ...
Cached Biology Technology:Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 2Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 3Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 4Midwest fares surprisingly well at Venture Forum in Los Angeles 2Midwest fares surprisingly well at Venture Forum in Los Angeles 3Midwest fares surprisingly well at Venture Forum in Los Angeles 4Kanavas thinks personal ID theft bill will pass this year 2
(Date:6/17/2015)... Deutschland und GERMANTOWN, Maryland , June ... ®   Produktlinie mit DNA-Tests verbessert den ... (NASDAQ: QGEN ; Frankfurt Prime Standard: QIA) hat ... STR-Testkits der Produktlinie Investigator ® ... Markt eingeführt. Die neuen Kits zur Erstellung genetischer Fingerabdrücke ...
(Date:6/16/2015)... , June 16, 2015  With the increasing ... security remains a top concern. The recent compromise of ... the need for strong authentication within government agencies. ... a biometric one-time password (OTP) authenticator, has been submitted ... (FIPS) 140-2 Level 3 validation for tamper proofing. ...
(Date:6/15/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... commerce market, announces that its leading payment security technology, the ... Experience! @ NYC June 18th. Digital Experience! @ ... in technology to over 300 of the top media covering ... Pavilion in New York City from ...
Breaking Biology News(10 mins):QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 2QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 3QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 4QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 5QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 6Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 2Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 3Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 2Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 3
... finding life on other planets and in extreme environments ... new astrobiology initiative under a five-year grant from NASA,s ... Beyond." Christopher H. House, associate professor of geosciences, ... detect and characterize life, look for biological signatures in ...
... storms will continue to slam the Gulf Coast, and even ... more frequent. , How we handle them will be the ... Storm Prediction and Global Climate Impact in the Gulf Coast ... Storm Prediction, Education and Evacuation from Disaster Center, primary sponsor ...
... Computational Neurobiology Laboratory at the Salk Institute has been ... announced. Election to the IOM is considered one of ... medicine and recognizes individuals who have demonstrated outstanding professional ... "It is a great pleasure to welcome these distinguished ...
Cached Biology News:Penn State receives new NASA astrobiology grant 2Penn State receives new NASA astrobiology grant 3Weather woes emphasize need for SSPEED 2Salk researcher Terry Sejnowski elected to Institute of Medicine 2
Human peripheral blood CD19+ B cells, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Monocytes, B Cells, NK Cells and Stem Cells...
Human peripheral blood basophils, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Granulocytes...
Umbilical cord blood CD4+ T cells, For immunohistochemistry (IHC) Cell Chip with Human Umbilical Cord Blood MNCs and T Cells...
... Isothermal Block is an anodized aluminum, solvent-resistant ... and to provide efficient thermal transfer to ... design of the HT96 Isothermal Block replaces ... product design allowing for compatibility with robotic ...
Biology Products: