Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > 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

Schematic illustration the energy-level alignment between the device components with (a) FTO-AB and (b) FTO-BA as the ETLs.

CREDIT
Kanazawa University
Schematic illustration the energy-level alignment between the device components with (a) FTO-AB and (b) FTO-BA as the ETLs. CREDIT Kanazawa University

Abstract:
Researchers have layered different mineral forms of titanium oxide on top of one another to improve perovskite-type solar cell efficiency by one-sixth. The layered titanium oxide layer was better able to transport electrons from the center of the cell to its electrodes. This novel approach could be used to fabricate even more efficient perovskite-type solar cells in future.

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

Kanazawa, Japan | Posted on March 2nd, 2019

While most solar cells are made of silicon, such cells are difficult to manufacture, requiring vacuum chambers and temperatures above 1000 °C. Research efforts have therefore recently focused on a new type of solar cell, based on metal halide perovskites. Perovskite solutions can be inexpensively printed to create more efficient, inexpensive solar cells.

In solar cells perovskites can turn light into electricity--but they have to be sandwiched between a negative and positive electrode. One of these electrodes has to be transparent, however, to allow the sun's light to reach the perovskites. Not only that, any other materials used to help charges flow from the perovskites to the electrode must also be transparent. Researchers have previously found that thin layers of titanium oxide are both transparent and able to transport electrons to the electrode.

Now, a Japan-based research team centered at Kanazawa University has carried out a more detailed study into perovskite solar cells using electron transport layers made of anatase and brookite, which are different mineral forms of titanium oxide. They compared the impact of using either pure anatase or brookite or combination layers (anatase on top of brookite or brookite on top of anatase). The team's study was recently published in the ACS journal Nano Letters.

The anatase layers were fabricated by spraying solutions onto glass coated with a transparent electrode that was heated to 450 °C. Meanwhile, the researchers used water-soluble brookite nanoparticles to create the brookite layers, as water-soluble inks are more environmentally friendly than conventional inks. These nanoparticles have been yielded poor results in the past; however, the team predicted that combination layers would solve the issues previously encountered when using the nanoparticles.

"By layering brookite on top of anatase we were able to improve solar cell efficiency by up to 16.82%," study coauthor Koji Tomita says.

These results open up a new way to optimize perovskite solar cells, namely via the controlled stacking and manipulation of the different mineral forms of titanium oxide.

"Using different mineral phases and combinations of these phases allows for better control of the electron transport out of the perovskite layer and also stops charges from recombining at the border between the perovskite material and the electron transport layer," says first author Md. Shahiduzzaman. "Together, both these effects allow us to achieve higher solar cell efficiencies."

Understanding how to create more efficient perovskite solar cells is important for developing a new generation of printable, low-cost solar cells that could provide affordable clean energy in the future.

####

For more information, please click here

Contacts:
Tomoya Sato

81-762-645-076

Copyright © Kanazawa 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

RELATED JOURNAL ARTICLE:

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

Perovskites

Brilliant glow of paint-on semiconductors comes from ornate quantum physics January 18th, 2019

New materials could help improve the performance of perovskite solar cells January 11th, 2019

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

High-performance self-assembled catalyst for SOFC October 12th, 2018

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

Energy

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

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 February 21st, 2019

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

Solar/Photovoltaic

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 February 21st, 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