Researchers at the universities in Linköping and Shenzhen have shown how an inorganic perovskite can be made into a cheap and efficient photodetector that transfers both text and music. “It’s a promising material for future rapid optical communication”, says LiU researcher Feng Gao.
“Perovskites of inorganic materials have a huge potential to influence the development of optical communication. These materials have rapid response times, are simple to manufacture, and are extremely stable.” So says Feng Gao, senior lecturer at LiU who, together with colleagues who include Chunxiong Bao, postdoc at LiU, and scientists at Shenzhen University, has published the results in the prestigious journal Advanced Materials.
All optical communication requires rapid and reliable photodetectors – materials that capture a light signal and convert it into an electrical signal. Current optical communication systems use photodetectors made from materials such as silicon and indium gallium arsenide. But these are expensive, partly because they are complicated to manufacture. Moreover, these materials cannot to be used in some new devices, such as mechanically flexible, light-weight or large-area devices.
Researcher have been seeking cheap replacement, or at least supplementary, materials for many years, and have looked at, for example, organic semi-conductors. However, the charge transport of these has proved to be too slow. A photodetector must be rapid.
A new family of materials
The new perovskite materials have been extremely interesting in research since 2009, but the focus has been on their use in solar cells and efficient light-emitting diodes. Feng Gao, researcher in Biomolecular and Organic Electronics at LiU, was awarded a Starting Grant of EUR 1.5 million from the European Research Council (ERC) in the autumn of 2016, intended for research into using perovskites in light-emitting diodes.
Perovskites form a completely new family of semi-conducting materials that are defined by their crystal structures. They can consist of both organic and inorganic substances. They have good light-emitting properties and are easy to manufacture. For applications such as light-emitting diodes and efficient solar cells, most interest has been placed on perovskites that consist of an organic substance (containing carbon and hydrogen), metal, and halogen (fluorine, chlorine, bromine or iodine) ions. However, when this composition was used in photodetectors, it proved to be too unstable.
The results changed, however, when Chunxiong Bao used the right materials, and managed to optimise the manufacturing process and the structure of the film.
The film in the new perovskite, which contains only inorganic elements (caesium, lead, iodine and bromine), has been tested in a system for optical communication, which confirmed its ability to transfer both text and images, rapidly and reliably. The quality didn’t deteriorate, even after 2,000 hours at room temperature.
“It’s very gratifying that we have already achieved results that are very close to application,” says Feng Gao, who leads the research, together with Professor Wenjing Zhang at Shenzhen University.
Receive an email update when we add a new OPTICAL COMMUNICATIONS article.
The Latest on: Optical communications
via Google News
The Latest on: Optical communications
- Quantum Photonics Breakthrough Promises a New Era of Powerful Optical Circuitson April 10, 2021 at 10:39 pm
A world-first method to enable quantum optical circuits that use photons—light particles—heralds a new future for secure communication and quantum computing. The modern world is powered by electrical ...
- Florida Tech Professor Syed Murshid Awarded New Patents For Quantum Communication Researchon April 9, 2021 at 9:00 pm
Two new patents awarded to Florida Tech computer engineering and sciences professor Syed Murshid may help further boost the data-carrying capacity of optical fibers, a key development that could turn ...
- Five Indian American Researchers Honored with Prestigious Guggenheim Fellowships for 2021on April 9, 2021 at 5:00 pm
Jain’s research interests include extra-legal forms of communications, such as warning signs and medical ... Dey, an astronomer at the National Optical Astronomy Observatory, studies how galaxies form ...
- Quantum technologies for computing, comms and imaging at Hannover Messeon April 8, 2021 at 7:17 pm
Optics- and photonics-dependent quantum technologies continue to proliferate. The Fraunhofer Institute for Applied Optics and Precision Engineering (IOF) is set to showcase its la ...
- Electro-absorption modulation in GeSn alloys for wide-spectrum mid-infrared applicationson April 8, 2021 at 5:00 pm
Room-temperature Si-based MIR EPICs can be utilized for a broad range of applications, such as high-speed optical communications, remote sensing, environmental monitoring, astronomy, infrared imaging, ...
- Airbus and TNO to Develop Aircraft Laser Communication Terminalon April 8, 2021 at 8:12 am
Airbus and the Netherlands Organization for Applied Scientific Research (TNO) have launched a program to develop a laser communication terminal demonstrator for aircraft, known as UltraAir. The ...
- Optical links to connect air passengers securelyon April 8, 2021 at 7:20 am
A laser communications terminal prototype to demonstrate this vision is currently being developed by satellite manufacturer Airbus, working in partnership with the Netherlands organization for applied ...
- Global Optical Communication Network Equipment Market 2021 Strategic Assessments – Huawei, ZTE, ALU, Fiber Home, Cisco Systemson April 5, 2021 at 9:05 pm
The Optical Communication Network Equipment Market is expected to register a CAGR of around 6.2%, during the forecast period 2021 to 2027. Huawei, ZTE, ALU, Fiber Home, Cisco Systems, Inc., Nokia, ...
- Self-Learning, Self-Evolving Smart Quantum Technologies for Secure Communicationon April 5, 2021 at 4:02 pm
Researchers from Louisiana State University have introduced a smart quantum technology for the spatial mode correction of single photons. In a paper featured on the cover of the March 2021 issue of ...
via Bing News