Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > High-speed surveillance in solar cells catches recombination red-handed: Researchers at Osaka University introduce a new time-resolved microscopy method that allows them to monitor the trajectories of fast-moving charged particles at unprecedented rates

This is a schematic diagram illustrating the principle of tip-synchronized time-resolved electrostatic force microscopy.

CREDIT
Osaka University
This is a schematic diagram illustrating the principle of tip-synchronized time-resolved electrostatic force microscopy. CREDIT Osaka University

Abstract:
A research team at Osaka University has developed an improved method for producing microscope images that can spot speedy electrons zipping through nanomaterials used in solar panels. By applying laser light to the device at just the right times, this group achieved nanosecond time resolution for the first time while maintaining the magnification. This work could improve the quality of photovoltaic materials for devices such as solar panels by helping to identify and eliminate inefficiencies during the manufacturing process.

High-speed surveillance in solar cells catches recombination red-handed: Researchers at Osaka University introduce a new time-resolved microscopy method that allows them to monitor the trajectories of fast-moving charged particles at unprecedented rates

Osaka, Japan | Posted on February 21st, 2019

Surveillance cameras are ubiquitous, and extremely valuable to the police when trying to catch thieves. However, cameras that record only a single movie frame per minute would be useless for apprehending speedy robbers who can make their getaway in less than sixty seconds. Solar panels harness the power of the sun when electrons become excited to a higher energy level, leaving a void, or "hole", behind. However, if an electron recombines with a hole before reaching the electrode, the harvested energy is lost, "robbing" the device of critical efficiency.

Currently available microscopy methods are too slow to catch the miscreants in the act. So the team at Osaka used electrostatic force microscopy (EFM), in which a tiny, vibrating cantilever tip is made sensitive to electric charges passing beneath it. EFM is still usually too slow to watch electrons and holes in motion, but their key innovation was to apply synchronized laser pulses that hit the sample at the same point of the cantilever's oscillation. By altering the delay time between the start of the cycle and the laser pulse, they were able to create a movie with frames as fast as 300 nanoseconds. "This is the first time anyone was able to combine nanosecond time resolution without sacrificing magnification," said lead author Kento Araki.

When the researchers probed the "scene of the crime", they were able to obtain video evidence of recombination as it was occurring. This method may be extremely useful for designing more efficient solar panels by reducing the energy losses due to recombination. According to senior author Takuya Matsumoto, "the research is also potentially useful for the study of catalysts or batteries that depend on light activation."

####

About Osaka University
Osaka University was founded in 1931 as one of the seven imperial universities of Japan and now has expanded to one of Japan's leading comprehensive universities. The University has now embarked on open research revolution from a position as Japan's most innovative university and among the most innovative institutions in the world according to Reuters 2015 Top 100 Innovative Universities and the Nature Index Innovation 2017. The university's ability to innovate from the stage of fundamental research through the creation of useful technology with economic impact stems from its broad disciplinary spectrum. Website: https://resou.osaka-u.ac.jp/en/top

For more information, please click here

Contacts:
Saori Obayashi

81-661-055-886

Copyright © Osaka University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

The article, "Time-resolved electrostatic force microscopy using tip-synchronized charge generation with pulsed laser excitation" was published in Communications Physics at DOI:

Related News Press

News and information

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Exotic “second sound” phenomenon observed in pencil lead: At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports March 15th, 2019

Imaging

Quantum sensing method measures minuscule magnetic fields: MIT researchers find a new way to make nanoscale measurements of fields in more than one dimension March 15th, 2019

Lightweight metal foams become bone hard and explosion proof after being nanocoated March 14th, 2019

New optical imaging system could be deployed to find tiny tumors: Near-infrared technology pinpoints fluorescent probes deep within living tissue; may be used to detect cancer earlier March 8th, 2019

New blueprint for understanding, predicting and optimizing complex nanoparticles: Guidelines have the potential to transform the fields of optoelectronics, bio-imaging and energy harvesting March 1st, 2019

Possible Futures

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Exotic “second sound” phenomenon observed in pencil lead: At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports March 15th, 2019

Discoveries

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Review of the recent advances of 2D nanomaterials in Lit-ion batteries March 15th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Announcements

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Exotic “second sound” phenomenon observed in pencil lead: At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports March 15th, 2019

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Fish-Inspired Material Changes Color Using Nanocolumns March 18th, 2019

New method to reduce uranium concentration in contaminated water March 18th, 2019

Review of the recent advances of 2D nanomaterials in Lit-ion batteries March 15th, 2019

Converting biomass by applying mechanical force Nanoscientists discover new mechanism to cleave cellulose effectively and in an environmentally friendly way March 15th, 2019

Tools

Lightweight metal foams become bone hard and explosion proof after being nanocoated March 14th, 2019

Nanometrics Announces $80 Million Share Repurchase Program March 14th, 2019

New optical imaging system could be deployed to find tiny tumors: Near-infrared technology pinpoints fluorescent probes deep within living tissue; may be used to detect cancer earlier March 8th, 2019

New blueprint for understanding, predicting and optimizing complex nanoparticles: Guidelines have the potential to transform the fields of optoelectronics, bio-imaging and energy harvesting March 1st, 2019

Energy

Layering titanium oxide's different mineral forms for better solar cells: Kanazawa University-led researchers layer two different mineral forms of titanium oxide to improve electron flow at the negative electrode for better metal halide perovskite-type solar cells March 2nd, 2019

New blueprint for understanding, predicting and optimizing complex nanoparticles: Guidelines have the potential to transform the fields of optoelectronics, bio-imaging and energy harvesting March 1st, 2019

Avoiding the Crack of Doom: New imaging technique reveals how mechanical damage begins at the molecular scale February 25th, 2019

Exotic spiraling electrons discovered by physicists: Rutgers-led research could lead to advances in lighting and solar cells February 18th, 2019

Solar/Photovoltaic

Layering titanium oxide's different mineral forms for better solar cells: Kanazawa University-led researchers layer two different mineral forms of titanium oxide to improve electron flow at the negative electrode for better metal halide perovskite-type solar cells March 2nd, 2019

Exotic spiraling electrons discovered by physicists: Rutgers-led research could lead to advances in lighting and solar cells February 18th, 2019

Self-assembling nanomaterial offers pathway to more efficient, affordable harnessing of solar power: The new materials produce a singlet fission reaction that creates more and extends the life of harvestable electronic charges January 24th, 2019

Shelley Claridge, an assistant professor at Purdue University, is leading research to improve electronic and energy conversion devices. (Image by Vincent Walter) January 24th, 2019

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project