MRS Bulletin Materials News Podcast

MRS Bulletin Materials News Podcast

Materials News podcast by MRS Bulletin provides breakthrough news & interviews with researchers on the hot topics of 3D bioprinting, artificial intelligence and machine learning, bioelectronics, perovskites, quantum materials, robotics, and synthetic biology. Produced by the Materials Research Society.... Show More

Research on perovskites has progressed rapidly for PV and LEDs, with new solar-cell efficiency records being set at a regular pace. There are hints of the first commercial products reaching the market by 2020, just a decade since perovskite photovoltaics were first discovered. MRS Bulletin presents the impact of a recent advance in this burgeoning field. Read the abstract in Science (doi:10.1126/science.aau5701).

Transcript
Welcome to MRS Bulletin’s Materials News Podcast, providing breakthrough news & interviews with researchers on the hot topics of 3D bioprinting, artificial intelligence and machine learning, bioelectronics, perovskites, quantum materials, robotics, and synthetic biology. My name is Bob Braughler.  

Metal-halide perovskite solar cells degrade when exposed to oxygen and moisture. Encapsulating the devices makes them more stable and long-lasting, but it does not solve one issue that crops up during regular device operation. Light, electric field, and thermal stress can all make lead and iodide ions more reactive, generating lead and iodine defects that serve as recombination centers for charge carriers and bring down device efficiency and lifetime. 

Researchers at Peking University have invented a novel technique for combating these defects. They added a rare-earth europium ion pair to lead-iodide perovskites. The redox pair shuttled electrons in a cyclical fashion from the defects, oxidizing lead and reducing iodine to recover lead and iodine ions. Devices with this redox shuttle have a power efficiency of 21.52%, and they retained more than 90% of this efficiency under 1-sun continuous illumination or heating at 85°C for 1500 hours. 

This work was published in a recent issue of Science. My name is Bob Braughler from the Materials Research Society. 

For more news, log onto the MRS Bulletin website at mrsbulletin.org and follow us on twitter, @MRSBulletin. Thank you for listening.   

Share
Mark as Played

Chat About MRS Bulletin Materials News Podcast

Popular Podcasts

The Ron Burgundy Podcast
The Ron Burgundy Podcast
Will Ferrell reprises his role as Ron Burgundy in his brand new Ron Burgundy Podcast! Each episode has a different theme in which Ron engages in conversation with another notable person on the topic at hand.
Atlanta Monster / Monster: The Zodiac Killer
Atlanta Monster / Monster: The Zodiac Killer
Atlanta Monster / Monster: The Zodiac KillerFrom Tenderfoot TV and HowStuffWorks, 'Monster: The Zodiac Killer' dives into one of the most notorious, unsolved serial killing sprees in history.
The Joe Rogan Experience
The Joe Rogan Experience
Joe Rogan's Weekly Podcast