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IR Heating Dip Coater for Metal Coating

Organic light-emitting diodes (OLED) is a flat light emitting technology, which has attracted considerable attention in the industry, due to their eco-friendly nature, low power consumption, better durability, self-illumination and improved image quality. Conventionally vacuum evaporation method is used to prepare OLED electrodes but it has complicated vacuuming processes and low economic efficiency. Here IR heating Dip Coater can be used.

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These silver electrodes can be easily prepared by the dip-coating method and sintering the silver film by infrared process. This process is not only energy efficient but also economically feasible.

IR heating Dip Coater Process

Silver electrode films were prepared by dip-coating after setting the cycles and the rates of pull-ups and other parameters. Polyvinylpyrrolidone (PVP) is used as the stabilizer as well as the anisotropic agent. Infrared is used to achieve the sintering of the dip-coated silver films. The silver electrode is directly irradiated and sintered by infrared light from the top side. It promotes the deformation of PVP on the surface of silver nanoparticles and improves the conductivity of the silver film. As the silver particles are in close contact, due to infrared light, conductivity and flatness of silver electrodes is improved. In conventional sintering at 250°C for 30 min, a silver film with a sheet resistance 0.94 Ω sq−1 is be obtained. While in infrared sintering at 250 W for 30 min, the sheet resistance becomes 0.89 Ω sq−1. Conductivity of silver film can be increased by increasing irradiating power and time in infrared sintering.

Applications Of IR Heating With Spin Coater

Applications Of IR Heating With Spin Coater

Spin coating is an easy and fast method to generate uniform thin films and is commonly preferred in deposition of polymers, nanoparticles, biomaterials, etc. The method of IR-irradiation during spin coating provides impressive potential in scientific environments. In a single coating step of hybrid suspension, IR heating causes an increase in layer thickness by more than 3 times. It also accelerates the aging which leads to faster gelation, thus the sol – gel – transition occurs after a shorter period of time. For perovskite thin film…

Applications Of IR Heating With Spin Coater - perovskite thin film coating
Spin coating as a thin film deposition technique

Perovskite thin film using spin coating equipment

In fabrication process of perovskite, air humidity was just 25% with infrared heating while it was about 55% without IR. The air humidity could significantly impact the morphology of the prepared perovskite. Perovskite thin film prepared with infrared heating presented compact and uniform, with grain size of CH3NH3PbI3 estimated to be 220 nm. While without infrared heating, it was rough and leaky. The resistance of the perovskite absorber layer prepared device with infrared heating exhibited low series resistance (Rs) and high shunt resistance (Rsh) compared to that of without infrared heating. Rs and Rsh is beneficial for charge extraction and transport.

The rough and highly porous scaffold m-TiO2 thin film was proved to be an excellent host material for perovskite growth and its thickness can affect the perovskite deposition. The infrared heating applied during the process not only can low the ambience moisture, but also can offer stereoscopic uniform thermal radiation to warm up the m-TiO2 layer. The warmed m-TiO2 layer helps to get the uniform perovskite. The uniform absorber layer is quite important since perovskite solar cells prepared by traditional methods often suffer from inadequate filling of perovskite at the bottom, which increases the recombination of carriers leading to decrease in efficiency in solar cells.

IR heating also helps to prepare good quality perovskite absorber layer with decreased annealing temperature and avoids high intensity light annealing process. The approach of using IR-irradiation during the spin coating process to control evaporation in solvent-based systems and improving layer thickness is very promising.

By V.R. NIVEDHA SHALINI

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Spin Coater Machine Updates

Everyone in the field of scientific research and laboratory work knows what spin coating technique is. When they require a tool to apply thin film uniformly on a flat substrate, they use a spin coater’s centrifugal force to get the job done with finesse. As a spin coating machine manufacturer and supplier in India, it’s proud to share that Navson spinners are reputed for the advance features, that are required in today’s nanotechnology labs. The machines are being used to deliver spin coated thin films ranging from a few nanometers to a few microns and these thin films are then being extensively used in a large spectrum of technology products and solutions. If you want to quickly and easily produce very uniform thin films with the superior most quality, the NT12000 will be the best suitable machine.

Two examples of spin coater machine use

Spin coating technique, as discussed above, is used for uniform and low cost deposition of thin films on the nano scale, like polymers, on different substrates, like for photoresists. So the micro electronics industries across the globe use spin coaters for fabrication of nanostructured thin films.

Microelectronics Industry

So a fluoropolymer like the Teflon AF®, that is used in the biomedical industry as well as energy harvesting products requires thin films for their micro-nanostructure functions.

The other uses of such nanostructures can be seen in optical fiber cladded products, in photolithography, and electronics for high-speed computing circuitry.

Super-hydrophobic coatings

For applications that require non-wetting and low-friction coatings, super hydrophobic coatings on a nano scale are desired.

Like scientists have used spin coaters to fabricate super hydrophobic coatings on glass surfaces with high levels of chemical, thermal, and mechanical stability .

New technical advancements in extremely diverse industries with varied end-use applications, today require thin films on the nano scale. Here, researchers who want to quickly deposit chemical solutions, with widely differing properties and performance criteria, resort to spin coaters.