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New Routes to More Efficient Vapor Deposited Metal-Halide Perovskite Films

January 11, 2021 | By KJLC Innovate

For nearly a decade the Kurt J Lesker Company has been shipping Physical Vapor Deposition (PVD) tools into the field of perovskite solar cells around the world and continues to support world class research into this exciting technology. A key topic in the fabrication of vapor deposited perovskite photovoltaics is how much the crystal grain boundaries affect the solar cell performance (see Figure 1). Recent work, published in ACS Energy Letters, titled "Control over crystal size in vapor deposited metal-halide perovskite films' by Killian Lohmann, Jay Patel, Mathias Uller Rothmann, Chelsea Xia, Robert Oliver, Laura Herz, Henry Snaith and Michael Johnston from the University of Oxford, in the UK, has not only identified key parameters that effect the grain growth in perovskite thin films but the team has also developed a novel method to control the deposition of the organic precursor, resulting in highly efficient solar cells.

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INNOVATE Systems Vacuum Science Deposition Techniques



Determining Crucible Fill Rate

November 17, 2020 | By KJLC Blog

KJLC recommends that a crucible liner be filled somewhere between 2/3 and 3/4 full when beginning deposition. The melt level should not go below 30% at any time or there becomes a risk of the beam striking the crucible, causing it to break.

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Vacuum Science Deposition Materials



Uncovered Potential of Co2MnGa in Spintronics

October 26, 2020 | By KJLC Innovate

The Kurt J. Lesker Company continues to support the researchers who are advancing the science and technology of spintronics around the world. Co2MnGa, a Heusler material, has been attractive to scientists as a novel magnetic conducting material on which spintronic structures like magnetic tunnel junctions can be built. Recent work, published in Applied Physics Letter titled "Perpendicular magnetic anisotropy in Co2MnGa and its anomalous Hall Effect" by Dr. Ludbrook, Dr. Ruck and Dr. Granville from Victoria University of Wellington, New Zealand, has identified characteristics of thin film Co2MnGa that are necessary for realizing magnetic tunnel junctions.

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INNOVATE Systems Vacuum Science Deposition Techniques



Thermal Evaporation Source Selection

October 12, 2020 | By KJLC Blog

Selecting the correct thermal evaporation source can sometimes prove difficult. There are several factors that will need to be considered when doing so.

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Vacuum Science Deposition Materials



Comparison of Hafnium Dioxide & Zirconium Dioxide Grown by Plasma-Enhanced Atomic Layer Deposition for the Application of Electronic Materials

October 01, 2020 | By KJLC Innovate

Dr. Zhigang Xiao, Professor of Electrical Engineering at Alabama A&M University, in collaboration with the ALD group in the Kurt J. Lesker Company recently developed the plasma-enhanced atomic layer deposition process and grow high dielectric constant (K) oxide for the application of electronic materials. They grew nanoscale hafnium dioxide (HfO2) and zirconium dioxide (ZrO2) thin films using remote plasma-enhanced atomic layer deposition (PE-ALD) and fabricated complementary metal-oxide semiconductor (CMOS) integrated circuits using the HfO2 and ZrO2 thin films as the gate oxide. Miniaturization in modern semiconductor industry requires thin film deposition to have atomic level control and the deposited film to be conformal and pinhole-free. As MOSFETs are scaled down to nanometer sizes, the tunneling currents through the gate dielectrics (the gate leakage current) has become a major concern in today’s fabrication of integrated circuits (ICs). High-K dielectric metal oxide could be a solution to the problem of the gate leakage current. The plasma-enhanced atomic layer deposition of HfO2 and ZrO2 thin films meets the requirement and can produce conformal and ultra-thin films with precise thickness control at the atomic layer level. The experimental results measured from the HfO2 and ZrO2 thin films were compared.

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INNOVATE Systems Vacuum Science Deposition Techniques



How To Chose An E-Beam Crucible Liner

August 26, 2020 | By KJLC Blog

Selecting the correct crucible liner for your e-gun can sometimes be challenging. Here are some things to consider...

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Vacuum Science Deposition Materials



Why Is My Sputtering Target Breaking?

August 25, 2020 | By KJLC Blog

Cerium oxide target

There are many reasons that sputtering targets fail. Some are material specific, while others can be avoided or prolonged by reviewing a few things before sputtering begins.

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Vacuum Science Deposition Materials



Ways To Reduce The Cost Of Depositing Precious Metals

July 28, 2020 | By KJLC Blog

A common question from our materials customers is how they can reduce the cost of depositing precious metals. Our Materials Product Manager, Katie McGough recommends some of the ways you can avoid overspending unnecessarily on precious metals such as through using a reclaim service or using thinner targets.

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Vacuum Science Deposition Materials



KJLC® Deposition System Restart Procedure

July 08, 2020 | By KJLC Blog

After an extended shut-down it may be time to re-start your Kurt Lesker built thin film deposition system. A detailed re-start procedure for systems equipped with our eKLipse control software can be found below. This procedure provides a detailed description of the steps required to safely return our deposition systems to full operation.

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Systems Vacuum Science



Tips For Thermally Evaporating Aluminum

June 16, 2020 | By KJLC Blog

By far one of the most common questions that we receive from various users is how to thermally evaporate Aluminum. Aluminum is very commonly evaporated for various applications and can be somewhat problematic. Through some internal experience and through with working with various customers, we recommend two ways to approach thermal evaporation of aluminum.

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Vacuum Science Deposition Materials Deposition Techniques



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