Beard

Stronger Together: Coupling Excitons to Polaritons for Better Solar Cells and Higher Intensity LEDs

Anonymous — Tue, 06 Aug 2024 06:00:00 +0000

Stronger Together: Coupling Excitons to Polaritons for Better Solar Cells and Higher Intensity LEDs Anonymous (not verified) Tue, 08/06/2024 - 00:00

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Room-temperature spin injection across a chiral perovskite/III–V interface

Anonymous — Wed, 19 Jun 2024 06:00:00 +0000

Room-temperature spin injection across a chiral perovskite/III–V interface Anonymous (not verified) Wed, 06/19/2024 - 00:00

NATURE, 2024, 10.1038/s41586-024-07560-4

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Controlling Exciton/Exciton Recombination in 2-D Perovskite Using Exciton-Polariton Coupling

Anonymous — Wed, 07 Feb 2024 07:00:00 +0000

Controlling Exciton/Exciton Recombination in 2-D Perovskite Using Exciton-Polariton Coupling Anonymous (not verified) Wed, 02/07/2024 - 00:00

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2024, 15, 6, 1748-1754

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Six RASEI Fellows named 2023 Clarivate Highly Cited Researchers

Anonymous — Wed, 15 Nov 2023 07:00:00 +0000

Six RASEI Fellows named 2023 Clarivate Highly Cited Researchers Anonymous (not verified) Wed, 11/15/2023 - 00:00

Each year Clarivate announces their Highly Cited Researchers list. This year five RASEI Fellows were included, Joe Berry, Matt Beard, Joey Luther, Mike McGehee, Mike Toney and Merritt Turetsky.

2023 Highly Cited Researchers List

Analysis

Clarivate Press Release

Researcher Spotlight

A highly cited researcher is an individual who has demonstrated significant and broad influence in their field(s) of researcher. Analysts at the Institute for Scientific Information (ISI)™ have recognized 6,849 Highly Cited Researchers in 2023, from more than 1,300 institutions in 67 nations and regions. The evaluation and selection process draws on data from the Web of Science™ citation index, together with analysis performed by bibliometric experts and data scientists at the ISI at Clarivate™.

Bar Veinstein, President of Academia & Government at Clarivate said: “We celebrate the Highly Cited Researchers whose contributions transform our world by helping to make it healthier, more sustainable and more secure. Recognition of Highly Cited Researchers not only validates research excellence but also enhances reputation, fosters collaboration, and informs resource allocation, acting as a beacon for academic institutions and commercial organizations.”

All RASEI fellows were awarded in the Cross-Field category, recognizing their collaborative interdisciplinary approaches.

Congratulations Joe, Matt, Joey, Mike, Mike, and Merritt!

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Electronic Impurity Doping of a 2D Hybrid Lead Iodide Perovskite by Bi and Sn

Anonymous — Thu, 08 Jun 2023 06:00:00 +0000

Electronic Impurity Doping of a 2D Hybrid Lead Iodide Perovskite by Bi and Sn Anonymous (not verified) Thu, 06/08/2023 - 00:00

PRX ENERGY, 2023, 2, 2, 023010

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2023 NREL Solar Photochemistry Retreat

Anonymous — Mon, 10 Apr 2023 06:00:00 +0000

2023 NREL Solar Photochemistry Retreat Anonymous (not verified) Mon, 04/10/2023 - 00:00

In April of 2023 RASEI hosted the NREL Solar Photochemistry retreat. The aim of these retreat meetings is to provide an opportunity for the team to catch up on recent progress, create time and opportunities to connect over research collaborations and outline a path forward for future research directions.

NREL Solar Photochemistry

04/2023

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RASEI Fellows elected to the 2022 Class of AAAS Fellows

Anonymous — Wed, 01 Feb 2023 07:00:00 +0000

RASEI Fellows elected to the 2022 Class of AAAS Fellows Anonymous (not verified) Wed, 02/01/2023 - 00:00

Find out about the AAAS Fellows

Check out the full 2022 Class

AAAS Fellows are a distinguished cadre of scientists, engineers, and innovators who have been recognized for their acheivements across disciplines, from research, teaching, and technology, to administration in academia, industry and government, to excellence in communicating and interpreting science to a range of audiences.

RASEI Fellows Garry Rumbles and Matthew Beard were selected as part of the Section on Chemistry 2022 Class of AAAS Fellows. Joining of cohort comprising of just 505 members for the 2022 class, election as a AAAS Fellow honors members whose efforts on behalf of the advancement of science, or its application in service to society, have ditinguished them among their peers and colleagues.

Congratulations Garry and Matt!

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New approaches enable more stable Perovskite Solar Cells

Anonymous — Tue, 31 Jan 2023 07:00:00 +0000

New approaches enable more stable Perovskite Solar Cells Anonymous (not verified) Tue, 01/31/2023 - 00:00

Over the past two months three reports from across a range of RASEI collaborations have been released that have focused on improving the stability, efficiency and scalability of perovskite materials for their application in solar cells.

This international, interdisciplinary, highly collaborative community of researchers assembles researchers from across eight different research organizations. The value of approaching a problem from a range of different perspectives highlights the benefits of bringing a diverse team together.

Learn more about this fascinating class of materials and how RASEI researchers are bringing it closer to changing the way we harvest and harness solar energy.

Compositional texture engineering for highly stable wide-band gap perovskite solar cells

Science, 2022, 378, 6626, 1295-1300 | Published 12/22/2022

This recent collaborative report, published in Science, brings together researchers from the National Renewable Energy Laboratory (NREL), University of Colorado Boulder (CU Boulder) and the University of Toledo, and includes RASEI Fellows Matthew Beard and Joseph Berry.

Tandem perovskite solar cells hold huge promise for future harvesting of solar energy. This work describes a new approach that greatly improves the reliability and robustness of technologies based on these materials.

Mixed halide perovskites, which contain a mixture of both iodine and bromine, are much more effective at capturing the sun’s energy than perovskites that contain just iodine or bromine. However, when these are repeatedly heated and cooled (as is required if you are going to install these on your roof), the bromine and iodine separate, which significantly reduces the efficiency of these materials. One of the identified causes of this separation is the presence of defects in the perovskite – essentially errors in the way in which the perovskite is stacked.

This report describes a new method that reduces the number of errors in the way the perovskites are built, which helps prevent the iodine and bromine separation, producing much more stable solar cells. Using a technique known as gentle gas quenching allows scientists to create perovskite films with far fewer defects, that have excellent operational stability. Using this new technique the team produced all-perovskite solar cells with 27.1% efficiencies.

Ethylenediamine addition improves performance and suppresses phase instabilities in mixed-halide perovskites

ACS Energy Letters, 2022, 7, 12, 4265-4273 | Published 11/02/2022

An international and interdisciplinary team, including RASEI members Seth Marder and Stephen Barlow, report on how the addition a cheap and readily available commodity chemical improves the performance and materials stability of perovskite materials.

This team, that brings together researchers from CU Boulder, the University of Washington, and the University of Oxford (UK), explored another approach to preventing defect formation in perovskites. As perovskite films are constructed, known as crystallization, errors and defects can creep in. The addition of ethylenediamine, an extremely cheap and readily available chemical, modulates the crystallization of the perovskites, which reduces the number of errors in its structure.

Employing the more regular and reliable perovskite structures not only improves the performance and stability of the perovskites in harvesting solar energy, it also provides possibilities for a more reproducible and scalable approach, critical for the application of these materials in real world installations.

Wettability improvement of a carbazole-based hole-selective monolayer for reproducible perovskite solar cells

ACS Energy Letters, 2023, 8, 898-900 | Published 01/06/2023

Research around perovskite materials has made huge strides in the past decade toward integration into commercial solar cells, but we are not there, yet. This team, which includes RASEI Fellow Mike McGehee, and researchers from the Kaunas University of Technology in Lithuania, and the Helmholtz Zentrum Berlin in Germany, report their work on one of the hurdles that has recently been identified for the reliable manufacture of perovskite-based solar cells.

In the repeated manufacture of perovskite devices in the lab setting it has been observed that the creation of a layer of perovskites has low reproducibility, sometimes it works extremely well, and sometimes the cell is terrible. This report provides evidence that this is due to the nonpolar nature of the surface. In the same way that water on an oily surface doesn’t form a uniform layer and instead forms droplets, the perovskite solution does the same thing.

The team showed that introduction of a polar molecule into the surface made it less ‘greasy’, and the polar perovskite solution made a thin film instead of droplet. This led to the formation of a reliable, reproducible and well covered perovskite solar cells, which showed high energy conversion efficiencies.

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Compositional texture engineering for highly stable wide-bandgap perovskite solar cells

Anonymous — Thu, 22 Dec 2022 07:00:00 +0000

Compositional texture engineering for highly stable wide-bandgap perovskite solar cells Anonymous (not verified) Thu, 12/22/2022 - 00:00

Science, 2022, 378, 6626, 1295-1300

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CHOISE EFRC Renewal Kickoff Meeting

Anonymous — Tue, 20 Dec 2022 07:00:00 +0000

CHOISE EFRC Renewal Kickoff Meeting Anonymous (not verified) Tue, 12/20/2022 - 00:00

The CHOISE EFRC, led by RASEI Fellow Matt Beard, and including the teams of RASEI Fellows Joe Berry, Joey Luther, Seth Marder, and Mike Toney, was renewed for five years in 2022.

To celebrate this success and convene the team for a brainstorming meeting on developing ideas for this next stage, RASEI worked with the CHOISE team to host a conference in December 2022 at the SEEC Building. This conference brought together over 100 researchers from across the country for three days of presentations, workshops, brainstorming sessions, and poster sessions.

Find out more about CHOISE

12/18/2022 - 12/20/2022

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