Subscribe to our free daily newsletters
  Solar Energy News  




Subscribe to our free daily newsletters



SOLAR DAILY
UNIST hits new world efficiency record with perovskite solar cells
by Staff Writers
Ulsan, South Korea (SPX) Jul 27, 2017


Professor Sang-Il Seok's research team at UNIST, South Korea. Image courtesy UNIST.

A recent study, affiliated with UNIST finds key to produce a new cost-efficient way to produce inorganic-organic hybrid perovskite solar cells (PSCs) which sets a new world-record efficiency performance of 22.1 % in small cells and 19.7 percent in 1-square-centimeter cells.

This breakthrough comes from a research, conducted by Distinguished Professor Sang-Il Seok of Energy and Chemical Engineering at UNIST in collaboration with Professor Jun Hong Noh of Korea Research Institute of Chemical Technology and Professor Eun Kyu Kim of Hanyang University who both partook as co-authors of the study.

A key feature of this technology is its ability to fix the dominating defect in perovskite-halides, which is known to decrease the photoelectric efficiency. Their results, published online in the June 30th issue of the prestigious journal Science, demonstrates that careful control of the growth conditions of perovskite layers with management of deficient halide anions is essential for realizing high-efficiency thin-film PSCs based on lead-halide-perovskite absorbers.

"This study can improve the current record efficiency of perovskite solar cells from 20.1% to 22.1%," says Professor Seok. "This will accelerate the commercialization of the low-cost, high-performance perovskite solar cells."

A perovskite is an unique crystal structure, consisting of formamidinium with multiple cations and mixed halide anions. A perovskite solar cell (PSC) is a type of solar cell, which includes the perovskite structured compound, most commonly a hybrid organic-inorganic lead or tin halide-based material, as the light-harvesting active layer.

An organic-inorganic hybrid PSC is a type of solar cell, which includes the perovskite structured compound, as the light-harvesting active layer. Such devices have inspired much research interest owing to their applications in high-efficiency solar cells and light emission. Indeed, these solar cells not only show relatively high photovoltaic energy conversion efficiencies (above 22%), but can be also easily fabricated using cheap inorganic-organic perovskite compounds.

The formation of a dense and uniform thin layer on the substrates is crucial for the fabrication of high-performance PSCs. The concentration of defect states, which reduce a cell's performance by decreasing the open-circuit voltage and short-circuit current density, needs to be as low as possible.

The research team reports that careful control of the growth conditions of perovskite layers with management of deficient halide anions is essential for realizing high-efficiency thin-film PSCs based on lead-halide-perovskite absorbers.

In their study, the research team demonstrated the introduction of additional iodide ions into the organic cation solution, which are used to form the perovskite layers through an intramolecular exchanging process, decreases the concentration of deep-level defects. The result showed that the defect-engineered thin perovskite layers enable the fabrication of PSCs with a certified power conversion efficiency of 22.1% in small cells and 19.7% in 1-square-centimeter cells.

The energy conversion efficiency of those PSCs with reduced defects is 22.1% and has been officially certified by the National Renewable Energy Laboratory (NREL).

"The key to manufacturing high-performance solar cells to reduce defects in materials that generate energy loss when converting sunlight to electricity," says Professor Seok. "Our study presents a new method that suppresses the formation of deep-level defects, thereby setting a new record efficiency for PSCs."

Woon Seok Yang, et al., "Iodide management in formamidinium-lead-halide-based perovskite layers for efficient solar cells," Science, (2017).

SOLAR DAILY
Solar Toolkit Developed to Help Municipalities Advance Solar Projects
Albany, NY (SPX) Jul 24, 2017
The New York State Energy Research and Development Authority (NYSERDA) has developed a Solar PILOT Toolkit to assist the state's municipalities in understanding and negotiating payment-in-lieu-of taxes (PILOT) agreements for solar projects larger than 1 MW, including community solar projects. Based on feedback from local government officials and solar industry representatives, NYSERDA developed ... read more

Related Links
Ulsan National Institute of Science and Technology
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
Fungi that evolved to eat wood offer new biomass conversion tool

How enzymes produce hydrogen

New biofuel technology significantly cuts production time

Solving a sweet problem for renewable biofuels and chemicals

SOLAR DAILY
Australia's robo-footballers go for gold at world champs

A robot that grows

Stanford researchers develop a new type of soft, growing robot

Rovers drive through Tenerife darkness

SOLAR DAILY
ABB wins $30 million order to support integration of offshore wind energy in the UK

GE's renewables not enough to boost overall revenue

Unbalanced wind farm planning exacerbates fluctuations

Algeria seen as African leader for renewable energy

SOLAR DAILY
Cartel probe looms over German car industry

Audi voluntarily recalls up to 850,000 diesel vehicles

World gears up for electric cars despite bumps in road

UK to ban sale of petrol and diesel cars by 2040

SOLAR DAILY
New chromium-based superconductor has an unusual electronic state

Molecular microscopy illuminates molecular motor motion

High-temperature superconductivity in B-doped Q-carbon

First direct observation and measurement of ultra-fast moving vortices in superconductors

SOLAR DAILY
Underwater robot probes inside Fukushima reactor

Finland's TVO claims partial win in Areva nuclear dispute

Laser-Armed Nuclear Icebreakers: What Russia Has in Store for Arctic

Britain must leave EU nuclear body: Verhofstadt

SOLAR DAILY
Sparkling springs aid quest for underground heat energy sources

Google's 'moonshot' factory spins off geothermal unit

Fighting global warming and climate change requires a broad energy portfolio

Low-carbon trajectory is the only option, European leaders say

SOLAR DAILY
Paying farmers not to cut down trees in Uganda helps fight climate change

Eucalyptus gets the chop after deadly Portugal forest fires

Amazon Makes Its Own Rainy Season

EU hauls Poland to top court over ancient forest logging




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - 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. Privacy Statement