Connect with us

Hi, what are you looking for?

CleanTechnica

Clean Power

Single Crystal Perovskites — Emerging Family Of Solar-Absorbing Materials Paves Way Towards More-Efficient & Potentially Cheaper Solar Cells

While perovskites have been a mainstay of solar energy research for some time now, the purest form of the material — perfect single crystals of perovskite — had never been investigated very deeply.

That’s changed now, though, with the release of new research findings from the University of Toronto + the King Abdullah University of Science and Technology.

Perovskites single perfect crystals

The new research utilized a “new technique” to grow rather large, pure crystals of perovskite — and then studied the way that electrons move through the material as electricity is created from the light.

“Our work identifies the bar for the ultimate solar energy-harvesting potential of perovskites,” stated Riccardo Comin, a post-doctoral fellow with the Sargent Group. “With these materials it’s been a race to try to get record efficiencies, and our results indicate that progress is slated to continue without slowing down.”

Here’s an explanation of the work via a recent press release:

The team used a combination of laser-based techniques to measure selected properties of the perovskite crystals. By tracking down the rapid motion of electrons in the material, they have been able to determine the diffusion length — how far electrons can travel without getting trapped by imperfections in the material — as well as mobility — how fast the electrons can move through the material.

In recent years, perovskite efficiency has soared to certified efficiencies of just over 20%, beginning to approach the present-day performance of commercial-grade silicon-based solar panels mounted in Spanish deserts and on Californian roofs.


 

“In their efficiency, perovskites are closely approaching conventional materials that have already been commercialized,” explained Valerio Adinolfi, a PhD candidate in the Sargent Group and co-first author on the paper. “They have the potential to offer further progress on reducing the cost of solar electricity in light of their convenient manufacturability from a liquid chemical precursor.”

Beyond solar energy applications, the new research has potential implications for the field of lighting solutions. The applications in lighting would be essentially just the opposite of this one in solar energy — send electrons through a slab of perovskite crystals, and enjoy the light released, rather than the other way around. This application will depend upon it being demonstrated as being economical of course, something that certainly isn’t a guarantee.

Associated/complementary work being done through the Sargent Group is focusing on colloidal quantum dots.

“Perovskites are great visible-light harvesters, and quantum dots are great for infrared,” stated lead researcher Professor Ted Sargent, of The Edward S Rogers Sr Department of Electrical & Computer Engineering at the University of Toronto. “The materials are highly complementary in solar energy harvesting in view of the sun’s broad visible and infrared power spectrum.”

“In future, we will explore the opportunities for stacking together complementary absorbent materials,” chimed in Dr Comin. “There are very promising prospects for combining perovskite work and quantum dot work for further boosting the efficiency.”

The new findings were recently published in the journal Science.

Image Credit: University of Toronto Engineering

 
Appreciate CleanTechnica’s originality? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 
 

Advertisement
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

Written By

James Ayre's background is predominantly in geopolitics and history, but he has an obsessive interest in pretty much everything. After an early life spent in the Imperial Free City of Dortmund, James followed the river Ruhr to Cofbuokheim, where he attended the University of Astnide. And where he also briefly considered entering the coal mining business. He currently writes for a living, on a broad variety of subjects, ranging from science, to politics, to military history, to renewable energy.

Comments

You May Also Like

Clean Power

Two holdouts put President Joe Biden's transformative legislative agenda at risk, but the perovskite solar cell revolution soldiers on.

Clean Power

“The research could prove indispensable for future information and computing technologies,” added Ok, a former ORNL postdoctoral fellow.

Clean Power

https://www.nrel.gov/news/features/2021/media/20210830-nasa-shutterstock-1061512492.mp4 Article courtesy of NREL. by Wayne Hicks On a clear night, Kaitlyn VanSant will be able to watch her work whiz by. Knowing the...

Clean Power

The U.S. Department of Energy Solar Energy Technologies Office is funding the American-Made Challenges: Perovskite Startup Prize, a two-stage, $3 million prize competition designed...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.