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
- SDN Communications Picks Nokia's NSP to Automate IP and Optical Networkson June 25, 2020 at 12:54 am
SDN Communications, a leading business-to-business broadband service provider in the South Dakota and southern Minnesota region, has selected Nokia's Network Services Platform (NSP) to provide dynamic ...
- NEC: Alliance for Joint Research and Development and Global Rollout of ICT Products Utilizing Innovative Optical and Wireless Technologieson June 25, 2020 at 12:20 am
NTT Corporation and NEC Corporation today agreed to form a capital and business alliance for the purpose of joint research and ...
- Never Enough Bandwidth: Optical I/O Consortium Formed to Set Interconnect Standardson June 24, 2020 at 11:31 am
More than 20 companies have joined an industry consortium to establish specifications for multi-wavelength integrated optics – the emerging interconnect technology whose advocates say is critical to ...
- CW-WDM MSA Group Forms to Drive New Industry Standard for Optical Laser Sourceson June 24, 2020 at 7:47 am
Group today announced its formation as an industry consortium dedicated to defining and promoting specifications for multi-wavelength advanced integrated optics.
- Ribbon Communications Announces Three New Appointments to its Board of Directorson June 23, 2020 at 1:40 pm
PRNewswire/ -- Ribbon Communications Inc. (Nasdaq: RBBN), a global provider of real time communications software and network solutions to service ...
- Keysight Technologies to Showcase Data Center Interconnect Test Solutions at Optical Networking Innovations Eventon June 23, 2020 at 8:00 am
Keysight Technologies to Showcase Data Center Interconnect Test Solutions at Optical Networking Innovations Event ...
- Nokia selected by SDN Communications to prepare for 5G services by automating IP, optical networkson June 23, 2020 at 7:11 am
to provide dynamic control and management of SDN’s services throughout SDN Communications' IP and optical networks. Nokia said its platform will help drive efficient operations and enhanced service ...
- Ribbon Communications Appoints Miguel 'Mick' Lopez as Chief Financial Officeron June 23, 2020 at 4:26 am
(RBBN), a global provider of real time communications software and network solutions to service providers, enterprises, and critical infrastructure sectors, today announced the appointment of Mick ...
- New technique may enable all-optical data-center networkson June 22, 2020 at 8:05 am
A new technique that synchronises the clocks of computers in under a billionth of a second can eliminate one of the hurdles for the deployment of all-optical networks, potentially leading to more ...
via Bing News