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Purdue University researchers have developed inkjet printing technology that uses electronic circuits made of liquid metal to enable soft robots and flexible electronics. [Sources: 3]
A Chinese team recently published a research paper in Nano Letters describing the development of an inkjet printing technique - a printed copper nanoparticle layer with a high-speed sintering method. The study examined the performance of the nanoparticles of copper ink printed in inkjet beams by laser - intense pulsed light sintering. The Chinese team is investigating the design and construction of a copper nanoparticle layer that is printed on inkjet. It was performed with a scanning electron microscope for focusing electron beams (FEM). A laser was used for laser sinning and a laser pulses light to sintering the copper layer in the layer. [Sources: 0, 4, 10]
Inkjet printing offers more freedom in the choice of material, as it eliminates the need for etching and the production of patterned layers. Since the new ink could be printed on a variety of substrates such as silicon wafers, glass, plastics and paper, the researchers were able to achieve uniform print quality. As a result of the experiment, surface energy and pressure variables for substrates affected the performance of inkjet-printed Ag lines in the copper nanoparticle layer. [Sources: 1, 2, 10]
Inkjet processes can be more precise than previous processes, but conventional screen printing processes must use silicon wafers with a thickness of at least 200 microns, as a thinner wafer is likely to break off. As the print head does not contact silicon, thinner, more fragile parts cannot be used. [Sources: 8]
The efficiency of inkjet-printed materials is only 3.5%, and to obtain the amount of energy that conventional silicon solar cells can get, a much higher efficiency would have to be achieved than that set by Power Plastic. Ultimately, inkjet printing is the most efficient way to produce printed electronic devices such as mobile phones and solar cells. [Sources: 6, 8]
Screen printing is most commonly used in the printing process to produce different types of solar cells, but inkjet printing has also been used recently and is now being used instead of screen printing to produce electronic devices such as mobile phones, tablets and other devices. Inkjet printing is also used today as a place for electrical connections between the electronic device and the solar cell, which is a much more efficient and efficient way of printing materials, which is exactly what is needed to produce silicon wafers for high-energy solar modules. Some companies have also produced solar cells with inkjet printing and use offset web presses to transfer the material to foil. [Sources: 8]
In the future, the research team plans to demonstrate the printing of wafers - scale devices, including inkjet - printed low-light photodetectors. This is based on the results of the study "Inkjet Printed Silver Salt Printed in situ by reduction" in the Journal of Applied Physics Letters. [Sources: 2, 10]
The silicon substrate was pre-treated with 1% diluted RF, which was used to remove the native silicon oxide from the high temperature IR sintering process. The silicon wafer was also pretreated in the same way by removing 1.5% HF native oxidizing agent, and then the silicon substrates were treated again, this time with 2% diluted HF. [Sources: 9]
This combination allows anisotropic etching, resulting in a silicon structure with a high aspect ratio. This shows that a combination of inkjet printing and wet etching can be used for micropatterized silicon wafers - scale printing with a size of 30 - 100%. BP ink can also be printed on existing silicon technology such as silicon-based photodetectors, increasing their performance and extending their life cycle. It is an important step forward in the development of scale-up device printing that integrates thousands of devices on one awafer and offers the potential for the production of high-performance photovoltaics - powerful, inexpensive, high-quality, ultra-powerful. [Sources: 5, 9]
First, the development of inkjet technologies - printed on existing CMOS integrated circuits and other silicon-based technologies - has great potential for the production of high-performance photovoltaics, such as photodetectors and solar cells. [Sources: 2]
Inkjet printing is also a completely new type of thin film that could be used for a number of purposes. The use of inkjet printing to apply semiconducting materials to flexible substrates, which could lead to the production of high-performance photovoltaics such as solar cells, has the potential to be available to anyone who owns an inkjet printer. Inkset printing can also be improved with PV manufacturing processes that have already been developed, for example by using silicon wafers. [Sources: 8]
Ink printing is an excellent solution for material preservation and simple samples compared to other solutions and processing techniques. High quality printing also allows printing multi-layer printed circuit boards with complex geometries using BP ink. The 3D printing process for silicon wafers, processed with inkjet, enables the use of high-quality, high-performance and low-cost inkjet beams to print multilayer printed circuit boards in a wide range of shapes and sizes. [Sources: 5, 7, 10]