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I Found This Interesting. Joshua Damien Cordle

Solvent study solves solar cell durability puzzle

Rice University engineers say they've solved a long-standing conundrum in making stable, efficient solar panels out of halide perovskites.

It took finding the right solvent design to apply a 2D top layer of desired composition and thickness without destroying the 3D bottom one (or vice versa). Such a cell would turn more sunlight into electricity than either layer on its own, with better stability.

Chemical and biomolecular engineer Aditya Mohite and his lab at Rice's George R. Brown School of Engineeringreported in Science their success at building thin 3D/2D solar cells that deliver a power conversion efficiency of 24.5%.

That's as efficient as most commercially available solar cells, Mohite said.

"This is really good for flexible, bifacial cells where light comes in from both sides and also for back-contacted cells," he said. "The 2D perovskites absorb blue and visible photons, and the 3D side absorbs near-infrared."

Perovskites are crystals with cubelike lattices known to be efficient light harvesters, but the materials tend to be stressed by light, humidity and heat. Mohite and many others have worked for years to make perovskite solar cells practical.

The new advance, he said, largely removes the last major roadblock to commercial production.

"This is significant at multiple levels," Mohite said. "One is that it's fundamentally challenging to make a solution-processed bilayer when both layers are the same material. The problem is they both dissolve in the same solvents.

"When you put a 2D layer on top of a 3D layer, the solvent destroys the underlying layer," he said. "But our new method resolves this."

Mohite said 2D perovskite cells are stable, but less efficient at converting sunlight. 3D perovskites are more efficient but less stable. Combining them incorporates the best features of both.

"This leads to very high efficiencies because now, for the first time in the field, we are able to create layers with tremendous control," he said. "It allows us to control the flow of charge and energy for not only solar cells but also optoelectronic devices and LEDs."

The efficiency of test cells exposed to the lab equivalent of 100% sunlight for more than 2,000 hours "does not degrade by even 1%," he said. Not counting a glass substrate, the cells were about 1 micron thick.

Solution processing is widely used in industry and incorporates a range of techniques -- spin coating, dip coating, blade coating, slot die coating and others -- to deposit material on a surface in a liquid. When the liquid evaporates, the pure coating remains.

The key is a balance between two properties of the solvent itself: its dielectric constant and Gutmann donor number. The dielectric constant is the ratio of the electric permeability of the material to its free space. That determines how well a solvent can dissolve an ionic compound. The donor number is a measure of the electron-donating capability of the solvent molecules.

"If you find the correlation between them, you'll find there are about four solvents that allow you to dissolve perovskites and spin-coat them without destroying the 3D layer," Mohite said.

He said their discovery should be compatible with roll-to-roll manufacturing that typically produces 30 meters of solar cell per minute.

"This breakthrough is leading, for the first time, to perovskite device heterostructures containing more than one active layer," said co-author Jacky Even, a professor of physics at the National Institute of Science and Technology in Rennes, France. "The dream of engineering complex semiconductor architectures with perovskites is about to come true. Novel applications and the exploration of new physical phenomena will be the next steps."

"This has implications not just for solar energy but also for green hydrogen, with cells that can produce energy and convert it to hydrogen," Mohite said. "It could also enable non-grid solar for cars, drones, building-integrated photovoltaics or even agriculture."

Rice graduate student Siraj Sidhik is lead author of the paper. Rice-affiliated co-authors are exchange student Yafei Wang; graduate students Andrew Torma, Xinting Shuai, Wenbin Li and Ayush Agarwal; research scientists Tanguy Terlier and Anand Puthirath; Matthew Jones, the Norman and Gene Hackerman Assistant Professor in Chemistry and Materials Science and NanoEngineering; and Pulickel Ajayan, the Benjamin M. and Mary Greenwood Anderson Professor in Engineering and a professor of materials science and nanoengineering, chemistry, and chemical and biomolecular engineering. Other co-authors are postdoctoral researcher Michael De Siena and Mercouri Kanatzidis, a professor of chemistry, of Northwestern University; alumnus Reza Asadpour and Muhammad Ashraful Alam, the Jai N. Gupta Professor of Electrical and Computer Engineering, of Purdue University; postdoctoral researcher Kevin Ho, research scientist Rajiv Giridharagopal and David Ginger, the B. Seymour Rabinovitch Endowed Chair in Chemistry, of the University of Washington, Seattle; researchers Boubacar Traore and Claudine Katan of the University of Rennes; and Joseph Strzalka, a physicist at Argonne National Laboratory.

The Department of Energy Efficiency and Renewable Energy program (0008843), the Academic Institute of France, the European Union's Horizon 2020 research and innovation program (861985), the Office of Naval Research (N00014-20-1-2725), Argonne National Laboratory (DE-AC02- 06CH11357), the National Science Foundation (1626418, 1719797) and the Department of Energy (DE-SC00

Story Source:

Materials provided by Rice University. Original written by Mike Williams. Note: Content may be edited for style and length.

Journal Reference:

Siraj Sidhik, Yafei Wang, Michael De Siena, Reza Asadpour, Andrew J. Torma, Tanguy Terlier, Kevin Ho, Wenbin Li, Anand B. Puthirath, Xinting Shuai, Ayush Agrawal, Boubacar Traore, Matthew Jones, Rajiv Giridharagopal, Pulickel M. Ajayan, Joseph Strzalka, David S. Ginger, Claudine Katan, Muhammad Ashraful Alam, Jacky Even, Mercouri G. Kanatzidis, Aditya D. Mohite. Deterministic fabrication of 3D/2D perovskite bilayer stacks for durable and efficient solar cells. Science, 2022; 377 (6613): 1425 DOI: 10.1126/science.abq7652

[daniel1244martinez]

Global Tissue Engineering Market – Strategic Assessment and Forecast Till 2023

The Overall Outlook of the Tissue Engineering Market:

“Tissue Engineering is a process involving in-vitro development of tissues or organs. It is done to replace or support the function of defective or injured body part. Tissue engineering involves the application of biology and engineering for innovation of tissue substitutes that can maintain, restore and improve the function of ruptured human tissue. Products developed by this procedure are efficient and durable. Tissue engineering is gaining its popularity in various areas such as burn treatment or wound care, neurology products, orthopedics, urological products and others. On the basis of type of material used, tissue engineering and regeneration market can be segmented into synthetic, genetically modified and biological materials.”

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The Global Tissue Engineering Market 2018 research report in the beginning introduces various dimensions of the Tissue Engineering market along with the consumption volume, Tissue Engineering market growth and tendencies of Tissue Engineering market over the forecast period from 2018 to 2023. The fundamental market study of the Tissue Engineering Industry is carried out in this research report that where the customers can make precise decisions about the industry and, uplift the Tissue Engineering market growth and also help increase the users understanding about the current Tissue Engineering market directions.

Tissue Engineering Market research report brings to the table the global market. Geographically, Tissue Engineering Market report is divided into various key Regions, and includes all major key Manufacturers in the world from North America, Europe, Asia, South America and Other regions, the other regions can be customized as per user’s requirement.

Leading Marketing/Retailing Players Associated with the Tissue Engineering Industry are:

Allergan, Integra Lifesciences, C. R. Bard, Zimmer Biomet, Organogenesis, Osiris Therapeutics, Cryolife, ACell, Biocomposites, DSM, Episkin, J-TEC, Athersys, Biotime, B. Braun, International Stem Cell, Bio Tissue Technologies.

On the basis of Product Types, the report breaches the Tissue Engineering industry into:

Synthetic Materials, Biologically Derived Materials, Others.

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On the basis of end users/applications, the report split the Tissue Engineering industry into:

Orthopedics, Musculoskeletal & Spine, Neurology, Cardiology & Vascular, Skin & Integumentary, Others.

The Worldwide Tissue Engineering Market report gives a detailed analysis of the top players in the Tissue Engineering market combined with their annual proceeds, Tissue Engineering manufacturing company profiles, contact information such as phone number or email address, different business game plans of Tissue Engineering market, their details to the Tissue Engineering market. Furthermore, the Tissue Engineering report also mentions the other contradictory parameters which have all the import/export details, Tissue Engineering supply chain outlines, Tissue Engineering manufacturing guidelines, Tissue Engineering market advancement outlook, consumer volume, business overview and the Tissue Engineering industry gross margin.

Key Aspects of the Tissue Engineering Market Research Report:

The Tissue Engineeringmarket report presents a SWOT analysis that helps simplify the clients to make the correct business choices of the Tissue Engineering industry.

The detailed competitive analysis of Tissue Engineeringindustry report will help the clients to correctly mention the better opportunities for a desired Tissue Engineering business analysis.

An In-depth investigation of the extent of the Tissue Engineeringmarket status is based on precise market segmentation and is carried out in this Tissue Engineering market research report.

The Tissue Engineeringreport also marks the different outlines and the innovative ways carried out by the key Tissue Engineering marketing players.

Further, the Tissue Engineering research report marks a connection of both good and bad experiences carried out by the Tissue Engineering industry along with its technology driven and cost-effective developments.

Towards the end, Global Tissue Engineering Market 2018 mentions various sources of information, traders, and distributors involved along with the Tissue Engineering research findings.

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