Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Making solar cells is like buttering bread

The 2D films based on 2-phenylethylammonium lead iodide produce 3D formamidinium lead iodide films via cation exchange.

CREDIT
Loi lab / University of Groningen
The 2D films based on 2-phenylethylammonium lead iodide produce 3D formamidinium lead iodide films via cation exchange. CREDIT Loi lab / University of Groningen

Abstract:
Formamidinium lead iodide is a very good material for photovoltaic cells, but getting the correct and stable crystal structure is a challenge. The techniques developed so far have produced rather poor results. However, University of Groningen scientists, led by Professor of Photophysics and Optoelectronics Maria Antonietta Loi, have now cracked it - using a blade and a dipping solution. The results were published in the journal Nanoscale on 15 March 2019.

Making solar cells is like buttering bread

Groningen, the Netherlands | Posted on March 22nd, 2019

Formamidinium lead iodide (FAPbI3) is a perovskite, a crystal with a distinctive structure. Perovskites are named after a mineral that has the chemical formula ABX3. In an idealized cubic unit cell, the X position is occupied by anions that form an octahedron with a central cation in the B position while the corners of the cube are occupied by the A position cations (see picture).

Industrial production

'This formamidinium lead iodide material has very good characteristics, but the A position formamidinium ion causes instability in the structure,' explains Loi. 3D films made from this material most often turn out to be a mixture of a photoactive and a photoinactive phase, the latter being detrimental to the final application. Loi therefore set her PhD student Sampson Adjokatse to work to find a solution.

After trying different strategies, he found one that worked. 'And most importantly, one that is scalable and could be used for industrial production,' says Loi. After all, solar cells must be produced in large panels and it is very important to find a good and cheap technique to do so. Adjokatse started with a different perovskite, in which the formamidinium was replaced by a larger 2 phenylethylammonium molecule, and in doing so formed a 2D perovskite. This material was deposited as a thin film using the 'doctor-blade' technique, related to techniques widely used in industrial processes such as printing.

Blade

'Basically, you spread the material onto a substrate using a blade,' explains Adjokatse. The blade can be set to produce a film with a thickness of around 500 nanometres, creating the 2D perovskite layer. 'The important point is that these films are very smooth with large crystalline domains of up to 15 micrometres,' says Adjokatse. The smooth 2D films based on 2-phenylethylammonium lead iodide were used as a template to produce 3D formamidinium lead iodide films.

This was achieved by dipping the 2D film in a solution containing formamidinium iodide. This resulted in the growth of a 3D film through 'cation exchange', where formamidinium took the place of 2 phenylethylammonium. 'These films show much higher photoluminescence compared to reference 3D formamidinium lead iodide films and show increased stability when exposed to light or moisture,' says Loi. 'This means that we now have a method for the production of high-quality films for perovskite solar cells using an industrially scalable technique.'

####

For more information, please click here

Contacts:
Rene Fransen

Copyright © University of Groningen

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

Reference: Sampson Adjokatse, Hong-Hua Fang, Herman Duima and Maria Antonietta Loi : Scalable fabrication of high-quality crystalline and stable FAPbI3 thin films by combining doctor-blade coating and the cation exchange reaction. Nanoscale, online 15 March 2019:

Related News Press

News and information

New record: 3D-printed optical-electronic integration June 18th, 2019

Can break junction techniques still offer quantitative information at single-molecule level June 18th, 2019

University of Konstanz researchers create uniform-shape polymer nanocrystals: Researchers from the University of Konstanz's CRC 1214 'Anisotropic Particles as Building Blocks: Tailoring Shape, Interactions and Structures' generate uniform-shape nanocrystals using direct polymeriz June 14th, 2019

Small currents for big gains in spintronics: A new low-power magnetic switching component could aid spintronic devices June 14th, 2019

2 Dimensional Materials

Kanazawa University research: Opposite piezoresistant effects of rhenium disulfide in two principle directions June 13th, 2019

2D crystals conforming to 3D curves create strain for engineering quantum devices June 7th, 2019

UCI scientists create new class of two-dimensional materials: Fabrication could help unlock new quantum computing and energy technologies June 6th, 2019

Flexible generators turn movement into energy: Rice University's laser-induced graphene nanogenerators could power future wearables June 2nd, 2019

Laser technique could unlock use of tough material for next-generation electronics: Researchers make graphene tunable, opening up its band gap to a record 2.1 electronvolts May 30th, 2019

Perovskites

UCI scientists create new class of two-dimensional materials: Fabrication could help unlock new quantum computing and energy technologies June 6th, 2019

Quantum rebar: Quantum dots enhance stability of solar-harvesting perovskite crystals: Researchers demonstrate that perovskite crystals and quantum dots working together can increase stability of solar materials May 24th, 2019

Possible Futures

New record: 3D-printed optical-electronic integration June 18th, 2019

Can break junction techniques still offer quantitative information at single-molecule level June 18th, 2019

Perfect diamagnetism observation of high-temperature superconductivity in compressed H2S June 14th, 2019

Mysterious Majorana quasiparticle is now closer to being controlled for quantum computing: Princeton researchers detect a robust Majorana quasiparticle and show how it can be turned on and off June 14th, 2019

Discoveries

New record: 3D-printed optical-electronic integration June 18th, 2019

Can break junction techniques still offer quantitative information at single-molecule level June 18th, 2019

Mysterious Majorana quasiparticle is now closer to being controlled for quantum computing: Princeton researchers detect a robust Majorana quasiparticle and show how it can be turned on and off June 14th, 2019

University of Konstanz researchers create uniform-shape polymer nanocrystals: Researchers from the University of Konstanz's CRC 1214 'Anisotropic Particles as Building Blocks: Tailoring Shape, Interactions and Structures' generate uniform-shape nanocrystals using direct polymeriz June 14th, 2019

Materials/Metamaterials

University of Konstanz researchers create uniform-shape polymer nanocrystals: Researchers from the University of Konstanz's CRC 1214 'Anisotropic Particles as Building Blocks: Tailoring Shape, Interactions and Structures' generate uniform-shape nanocrystals using direct polymeriz June 14th, 2019

Laser technique could unlock use of tough material for next-generation electronics: Researchers make graphene tunable, opening up its band gap to a record 2.1 electronvolts May 30th, 2019

Building next gen smart materials with the power of sound May 28th, 2019

ZEN gets $1m grant for graphene-enhanced concrete project May 12th, 2019

Announcements

New record: 3D-printed optical-electronic integration June 18th, 2019

Can break junction techniques still offer quantitative information at single-molecule level June 18th, 2019

University of Konstanz researchers create uniform-shape polymer nanocrystals: Researchers from the University of Konstanz's CRC 1214 'Anisotropic Particles as Building Blocks: Tailoring Shape, Interactions and Structures' generate uniform-shape nanocrystals using direct polymeriz June 14th, 2019

Small currents for big gains in spintronics: A new low-power magnetic switching component could aid spintronic devices June 14th, 2019

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

New record: 3D-printed optical-electronic integration June 18th, 2019

Can break junction techniques still offer quantitative information at single-molecule level June 18th, 2019

Perfect diamagnetism observation of high-temperature superconductivity in compressed H2S June 14th, 2019

University of Konstanz researchers create uniform-shape polymer nanocrystals: Researchers from the University of Konstanz's CRC 1214 'Anisotropic Particles as Building Blocks: Tailoring Shape, Interactions and Structures' generate uniform-shape nanocrystals using direct polymeriz June 14th, 2019

Energy

UCI scientists create new class of two-dimensional materials: Fabrication could help unlock new quantum computing and energy technologies June 6th, 2019

Data science helps engineers discover new materials for solar cells and LEDs May 24th, 2019

Quantum rebar: Quantum dots enhance stability of solar-harvesting perovskite crystals: Researchers demonstrate that perovskite crystals and quantum dots working together can increase stability of solar materials May 24th, 2019

Big energy savings for tiny machines May 24th, 2019

Solar/Photovoltaic

UCI scientists create new class of two-dimensional materials: Fabrication could help unlock new quantum computing and energy technologies June 6th, 2019

Data science helps engineers discover new materials for solar cells and LEDs May 24th, 2019

Quantum rebar: Quantum dots enhance stability of solar-harvesting perovskite crystals: Researchers demonstrate that perovskite crystals and quantum dots working together can increase stability of solar materials May 24th, 2019

Big energy savings for tiny machines May 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