Solar Energy News  
SOLAR DAILY
How to obtain highly crystalline organic-inorganic perovskite films for solar cells
by Staff Writers
Moscow, Russia (SPX) May 26, 2017


These are microphotos of perovskite films of various morphology obtained by the elaborated technique. Credit Alexey Tarasov

Members of the Laboratory of New Materials for Solar Energetics, working at the Faculty of Material Sciences, in cooperation with their colleagues from the Faculty of Chemistry of the Lomonosov Moscow State University have elaborated a new method. It allows to obtain highly crystalline organic-inorganic perovskite films for solar cells. The project results are published in the Materials Horizons.

Scientists of the Lomonosov Moscow State University Press Service has already worked on nanowires of hybrid organic-inorganic perovskites, which are treated as a promising substance for creation of light emitting diodes, lasers and photodetectors on their basis. However, the most promising application area for such substances is elaboration of perovskite solar cells - namely, photovoltaic devices of new generation.

Efficiency of these devices has risen by several times over the last five years and now comprises even more than 22%. This is significantly higher than maximum efficiency, obtained for solar cells on the basis of polycrystalline silicon. Efficiency of the most popular solar cells, produced industrially, is 12-15%.

At the moment one could distinguish two main approaches to obtaining of such material. The first one implies coating with chemical agents from vaporous state and the second one - solution crystallization. Projects, aimed at improving these methods, have been intensively developed in recent years. However, further perspectives of these approaches are almost exhausted. In this light elaboration of new techniques for creation of materials, used in photovoltaics, could give fresh impetus in the area development.

Alexey Tarasov, Doctor of Chemistry, the Head of the Laboratory and the Study Lead shares: "As part of the study we've found out several new compounds - polyiodides, which are liquid at room temperature, possessing unique properties. They look like viscous liquids of dark brown color with metal gleam, obtained from two solid powders, which simply melt while blending.

"Liquid state of such compounds allows not to use hazard solvents and, moreover, their chemical composition contributes to formation of a necessary perovskite upon contact with a metallic lead film or other lead compounds. As a result of the chemical interaction between a lead film and polyiodide melts, a perovskite film, comprised of large interpenetrating crystals, is formed.

Polyiodide melts are deposited on lead by a so called spin coating technique. For this purpose a glass substrate, on which a lead layer is applied by thermal spraying, is fixed on a whirling rod and starts rotating. Polyiodide is spilled on the whirling glass substrate and afterwards polyiodide residue is flushed by a solvent (namely, isopropanol). As a result you get perovskite films from 200 to 700 nm in thickness.

Their stability is determined, for the first place by the material, of which they consist. The members of the Faculty of Material Sciences have shown the possibility to diversify the composition of applied polyiodides and, consequently, the possibility to select a composition with optimal stability.

Alexey Tarasov comments: "A perovskite film exhibit intense photoluminescence and large lifetimes of charge carriers that provides good functional properties. We've also revealed in our project the possibility to obtain perovskite films of various compositions, while using mixed polyiodide compounds. Researches, conducted by our laboratory in the area of perovskite photovoltaics, are funded in the framework of a Federal Target Program of the Russian Ministry of Education and Science together with the industrial partner - EuroSibEnergo Company."

The Laboratory currently continues studying properties of discovered polyiodides and elaborating on their basis a technology, allowing to obtain solar cells with high efficiency.

Research paper

SOLAR DAILY
InnoEnergy-backed Solaris Offgrid raises 1M Euro to tackle global electricity poverty
Barcelona, Spain (SPX) May 22, 2017
Solaris Offgrid, the pay-as-you-go solar energy solutions provider working to improve access to electricity across rural populations, has raised more than 1M euros to fund R adn D and grow into new markets - providing more homes and businesses with affordable, clean energy. The funding comes as a direct result of Solaris Offgrid's success at The Business Booster, hosted by InnoEnergy, the ... read more

Related Links
Lomonosov Moscow State University
All About Solar Energy at SolarDaily.com


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only


Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

SOLAR DAILY
Discovery of an alga's 'dictionary of genes' could lead to advances in biofuels, medicine

A more energy-efficient catalytic process to produce olefins

New photocatalyst speeds up the conversion of carbon dioxide into chemical resources

Nagoya University researchers break down plastic waste

SOLAR DAILY
CMU's interactive tool helps novices and experts make custom robots

Google's AlphaGo retires on top after humbling world No. 1

Chess-playing robot star of Taiwan tech fair

Robots help shed light on how humans walk

SOLAR DAILY
U.S. states taking up wind energy mantle

GE Energy Financial Services Surpasses $15 Billion in Renewable Energy Investments

Scientists track porpoises to assess impact of offshore wind farms

Dutch open 'world's largest offshore' wind farm

SOLAR DAILY
Researchers find computer code that Volkswagen used to cheat emissions tests

Engines fire without smoke

China's Geely boosts expansion with Proton, Lotus stakes

Hong Kong police arrest 21 Uber drivers in sting

SOLAR DAILY
Printed, flexible and rechargeable battery can power wearable sensors

Nanoalloys 10 times as effective as pure platinum in fuel cells

Off-the-shelf, power-generating clothes are almost here

New approach to revolutionize the production of molecular hydrogen

SOLAR DAILY
Three Mile Island nuclear plant to close in 2019

Why nuclear could become the next 'fossil' fuel

EU clears EDF takeover of Areva reactor business

Swiss vote for gradual nuclear phaseout, energy makeover

SOLAR DAILY
China further opens energy sector to private investment

Australia power grid leased to local-foreign consortium

Poland central to EU energy diversification strategy

Myanmar recovery linked to development of electrical grid

SOLAR DAILY
Activists protest logging in Poland's ancient forest

Planting trees cannot replace cutting CO2 emissions

Myanmar's extensive forests are declining rapidly due to political and economic change

Solving the mystery of the white oak









The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.