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EPFL achieves 19.6% perovskite efficiency using vacuum coating
PV Magazine
Switzerland's Ecole Polytechnique Fédérale de Lausanne (EPFL) has used vacuum coating to deposit and grow a perovskite semiconductor layer, resulting in a 19.6% efficient cell. Researchers have applied a mild vacuum for 20 seconds to achieve the result, which is a low-temperature process.

Stability in the deposition of titanium dioxide
SVC Bulletin
Titanium dioxide (TiO2 or titania) has been a favored high index material for the visible and near infrared spectrum because of its high index and relative robustness. TiO2 appears historically to be less popular than other high index materials with some practitioners because of difficulties in obtaining a stable index result. This article reviews the probable causes of instability, how they might be controlled, and related information from the literature.

Low-cost coating for a more sustainable glass
The panoramic glass façades of modern day high-rises and office buildings may be aesthetically pleasing, but they can come at a cost. The visible light they let in, accompanied by infrared light that can cause buildings’ temperatures to rise, can lead to increased air-conditioning use and higher levels of energy consumption, especially in hot, desert climates like the UAE.

New nanomaterial ideal for wearable electronics
UPI via Gephardt Daily
Scientists have created a new bendable, stretchable nanomaterial ideal for use in wearable electronics and other smart materials. The nanomaterial is a thin film made by turning a tangled web of nanofiber into a solid substrate via a process called electroplating. In addition to being bendable and stretchable, the film is also transparent and highly conductive.

The complex material engineering of NASA's Webb Telescope sunshield
The shiny silver material of the five-layer sunshield that will fly aboard NASA's James Webb Space Telescope is a complex and innovative feat of material science and engineering. Each layer is made from a unique composite material, each has a specific thickness and size, and they must be precisely separated in space. There are even special seams and reinforcements to limit meteorite damage.


What you need to know about aluminum evaporation
Aluminum is a very popular material for evaporation. We have many different sources that can be used to successfully evaporate aluminum. However, there are a few common problems that occur when evaporating this material. One problem that you may be aware of that aluminum wets to most surfaces and does not stay in the evaporation area. The other, more significant problem is that moltent aluminum is very corrosive and will corrode through most surfaces and cause the boat or box to break during the evaporation process. Spitting is not normally a problem. Tungsten is the most resilient of the materials to this corrosiveness. Below are some things to consider when choosing the right source for your application:

A) What is the maximum current you have available to apply to the source?
B) How thick of a coating are you attempting?
C) What is the distance from the source to the substrate?
D) Are you evaporating in an upward direction?
E) What length source will fit in to your mounting points?

After reviewing the information above, you may be able to select the right source for your process. If you need further assistance, please do not hesitate to contact us.

Join R.D. Mathis Company at these upcoming events

Sept. 22, 2016 — Rocky Mountain Chapter AVS Symposium,
Westminister, Co

Oct. 4, 2016 — Southern California AVS, Holiday Inn – Buena Park, Buena Park, CA

Nov. 8-10, 2016 — National AVS (American Vacuum Society), Booth #423, Music City Center, Nashville, TN

Nov. 29-Dec. 1, 2016 — MRS (Materials Research Society), Hynes Convention Center, Boston, MA

The Evaporator

R.D. Mathis Company
P.O BOX 92916
Long Beach, Ca 90809-2916
Telephone (562) 426-7049
Fax (562) 595-0907
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