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:8/28/2015)... , ... August 28, 2015 , ... Since the initial launch of FireflySci Inc. (FFS) ... humor and excellent customer service. Images such as the Fonz in a lab coat ... some flavor to the humdrum spectroscopy field. , FireflySci is proud to be ...
(Date:8/27/2015)... LANSING, Mich. , Aug. 27, 2015  Neogen ... has acquired the stock of United Kingdom ... supplier of microbiological culture media and diagnostic systems. ... has grown into a leading provider of microbial testing ... and clinical testing markets. The company currently sells into ...
(Date:8/27/2015)...  Asterias Biotherapeutics, Inc. (NYSE MKT: AST), a leading ... today announced that executives from the company will present ... , Pedro Lichtinger , Chief ... Annual Global Investment Conference on Wednesday, September 10, 2015 ... in New York City . ...
(Date:8/27/2015)... NEW YORK , August 27, 2015 ... on enhancing image processing functions in the human vision system, ... Angeles point guard Chris Paul to ... basketball players who want to improve their real-life on-court performance. ... on the court, whether it is shooting a ball or ...
Breaking Biology Technology:Cuvette Manufacturer FireflySci Launches Back to School Deals with Complimentary Shipping On All Orders 2Neogen acquires U.K.-based Lab M Holdings 2Asterias Biotherapeutics to Present at Upcoming Investor Conferences 2Eight-Time All-Star Chris Paul and GlassesOff Partner to Develop Innovative Mobile App Designed to Improve On-Court Performance 2Eight-Time All-Star Chris Paul and GlassesOff Partner to Develop Innovative Mobile App Designed to Improve On-Court Performance 3
... SANTA ROSA, Calif. , Feb. 2 Just in ... introduces the newest in their scientifically formulated product line: CIRCUTOL™ Cardiovascular ... in 1995 by integrative medicine pioneer, Dr. Isaac Eliaz ... being at the forefront of the latest developments in natural alternative health ...
... Astrogenetix is ... Station (ISS) to 2020 or beyond. , ... (Vocus) February 1, 2010 -- Astrogenetix is issuing the following statement applauding NASA,s ... , ,Thomas B. Pickens III, Chairman of Astrogenetix, Inc.:, , ,“We are excited to see ...
... , SAN FRANCISCO , Feb. 1 ... acted as a placement agent in GenVec, Inc.,s (Nasdaq: GNVC ... of common stock, and warrants to purchase 4.2 million shares of ... (Logo:   http://www.newscom.com/cgi-bin/prnh/20090911/MCFLOGO ) , "We have been working with the ...
Cached Biology Technology:Just in Time for Heart Health Month... TRIPLE Cardiovascular Health Support From EcoNugenics 2Just in Time for Heart Health Month... TRIPLE Cardiovascular Health Support From EcoNugenics 3Astrogenetix Statement On Nasa's Fiscal Year 2011 Budget Announcement 2Merriman Curhan Ford Acted as Placement Agent in GenVec's $28 Million Registered Offering 2Merriman Curhan Ford Acted as Placement Agent in GenVec's $28 Million Registered Offering 3Merriman Curhan Ford Acted as Placement Agent in GenVec's $28 Million Registered Offering 4Merriman Curhan Ford Acted as Placement Agent in GenVec's $28 Million Registered Offering 5Merriman Curhan Ford Acted as Placement Agent in GenVec's $28 Million Registered Offering 6Merriman Curhan Ford Acted as Placement Agent in GenVec's $28 Million Registered Offering 7
(Date:8/6/2015)... 2015  Today, U.S. Congressman Mike Honda ... to learn firsthand how Silicon Valley technologies can ... a world leader in multi-factor identity management and ... federal agencies and commercial organizations achieve new levels ... "The vast majority of network breaches can be ...
(Date:8/5/2015)... August 5, 2015 Transparency Market ... Recognition Market - Global Industry Analysis, Size, Share, Growth, ... for facial recognition is forecast to reach US$ 2,671.8 ... demand for surveillance systems by civil and government agencies. ... crimes and terrorist activities across the globe that would ...
(Date:8/3/2015)... 2015 Synaptics, Inc. (Nasdaq: SYNA ), ... that members of the executive management team will present ... Technology Leadership Forum on Tuesday, August 11, 2015 at ... at the Sonnenalp Resort in Vail, CO. ... forward-looking information. An audio webcast of the event will ...
Breaking Biology News(10 mins):Rep. Honda to Visit Crossmatch in Redwood City 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 3Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 4Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 5Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 6
... well-known fairy tale, Rumpelstiltskin used magic to weave straw into ... to turn straw (and other forms of biomass) into today,s ... in which minute particles of gold dot the surface of ... two materials are strong enough to breaks the O-O bond ...
... Dec. 4, 2012 A recent ABC News report ... ensure greater security in large childcare facilities. While the use ... unwanted visitors and protect children from exiting the facility, the ... come in and out of the building. Slava Volman, owner ...
... CA Plants grow upward from a tip of undifferentiated ... stem cells at the center of the meristem divide and ... to form plant organs, such as leaves and flowers. In ... into a quiescent state and form a barrier that not ...
Cached Biology News:Gases from grasses 2Gases from grasses 3Slava Volman Responds to Use of Biometrics for Security in Childcare Facilities 2Plant organ development breakthrough 2
... The Rapid-Screen cDNA Library Panels were designed ... three sets of PCRs to identify the ... is performed in a 96-well "Master Plate," ... 5,000 clones. Having identified the positive well(s) ...
Application: For use as a carrier in nucleic acid purification and precipitation. Physical form: Solution in 10 mM Tris HCl, pH 7.4, 1 mM EDTA Concentration: 9-11 mg/mL Physical Form: buffered aqu...
... Preparation Note: Prepared by a ... C.W., et al., Biotechnol. Bioeng., ... Definition: One unit will yield an ... 1.0 ml of water (1 cm ...
... for calibrating single-channel and multi-channel pipettes. ,Thanks ... carrying case, the MCP1-S is ideal for ... on-site at the users premises. The unit ... individual channels are tested automatically. Multi-channel pipettes ...
Biology Products: