A team from the Institute of Materials Science in Barcelona has successfully drawn local patterns in organic semiconductor materials used in optoelectronic and photonic applications with high resolution and high speed. This method allows to modify the properties and final properties of the material, including conformation, orientation, crystallinity and molecular composition.
Researchers at the Barcelona Institute of Materials Science (ICMAB-CSIC) have been able to draw local patterns of organic semiconductor materials used in semiconductors with high resolution and high speed. Application field Optoelectronics and photonics.
According to the agency and the statement, the new method allows to modify the characteristics and characteristic The accompanying ends include conformation, orientation, crystallinity and molecular composition. The technology has been published in the open access of the following websites: Nature Communications, It has also been patented and is currently seeking industrial partners for its partners.
The author pointed out that in order to bridge the gap between the two Organic electronics As well as the ubiquitous silicon electronics technology, new low-cost manufacturing methods and technologies are required. cost And low Consume energy of. This research happens to represent a key technology that can accelerate the use of flexible and lightweight organic photonics and electronics to the level of silicon-based devices.
For things like Transistor Organic (OFET), organic light-emitting diode (OLED), organic photovoltaic (OPV), organic thermoelectric generator (OTEG) and organic photonic structures can be developed from laboratory scale to industrial scale in the following ways: the composition of organic semiconductors must be locally adjustable , In order to optimize its performance, such as charge carrier mobility, conductivity and luminescence, thereby expanding its functions.
Current methods for converting semiconducting polymer sheets into functionally active layers include techniques such as photolithography, laser technology (LIFT) or inkjet printing, to name a few. Some of these methods are fast but have low spatial resolution. Others can produce fine structures, but require laborious multi-step processes. The trade-off between speed and resolution is still an obstacle in the field, and more advanced methods are usually unable to simultaneously model all possible feature types.
The new ICMAB method involves the diffusion of small functional molecules through an intermediate layer, which acts as a “molecular gate” before reaching the semiconductor layer, causing the desired change in the intermediate layer, such as the direction of the chain. polymerImprove crystallinity and conductivity by doping or changing luminescence.
“This method is based on the fact that molecules are diffused and opens up the possibility of locally modifying the composition of each molecule. Therefore, accurate. This is why we say that our method introduces the concept of a la carte molecule in the search for low-cost solutions,” he said. Mariano Campoy Quills, One of the authors.
The diffusion of small molecules through the intermediate layer or “molecular gate” is activated by stimuli such as heat, light or steam. When a laser is used as a stimulus, local patterns of microstructures and high-resolution components can be obtained; therefore, the method is between printing and photolithography.
In addition, the method is inherently fast and compatible with all types of electronic devices and serial (eg roll-to-roll) and laboratory-scale processing of electronic devicesOsmotic organic. Campoy said: “The uniqueness of this technology is that it allows multiple functions to be modeled in one step. One example is that by controlling the diffusion of multiple small molecules during the diffusion process, three different emission types are obtained. Color pixels. Matrix polymer”.
According to co-authors Alexander Perevedentsev (Aleksandr Perevedentsev)“The beauty of all this lies in Versatility The concept itself is inherent. We are eager to take it to new areas. Will we build micro-tracks of electricity and heat? Can we make patterns with electron beams? And biomolecules? This article may be the first point on the map”
The application of this method in the manufacture and design of semiconducting polymer sheets (now patented) can bring organic electronics to a new level, thereby enabling photovoltaic, photonics, Transistor The authors say that other lightweight, flexible organic electronic devices may compete with silicon-based electronics.
Aleksandr Perevedentsev and Mariano Campoy-Quiles. “Using’molecular gates’ to quickly and high-resolution patterning of microstructures and components in organic semiconductors.” Nature Communications, 11, 3610, 2020 DOI: 10.1038 / s41467-020-17361-8