scholarly journals A Short History of Atomic Layer Deposition: Tuomo Suntola's Atomic Layer Epitaxy

2014 ◽  
Vol 20 (10-11-12) ◽  
pp. 332-344 ◽  
Author(s):  
Riikka L. Puurunen
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Atomic Layer Epitaxy ◽  
Short History ◽  
Layer Deposition ◽  
History Of

scholarly journals Learnings from an Open Science Effort: Virtual Project on the History of ALD

2018 ◽  
Author(s):  
Riikka Puurunen
Keyword(s):  
Atomic Layer ◽  
Open Science ◽  
Early History ◽  
Atomic Layer Epitaxy ◽  
Molecular Layering ◽  
Journal Articles ◽  
Layer Deposition ◽  
History Of ◽  
Virtual Project ◽  
Made In

This work summarizes learnings from an Open Science effort “Virtual project on the History of ALD” (VPHA), started in 2013 to clarify the early history of atomic layer deposition (ALD). ALD is a multi-tool of nanotechnology and has been e.g. enabler of the continuation of Moore’s law of transistor scaling. ALD has been developed historically through two independent routes: atomic layer epitaxy (ALE) and molecular layering (ML). Especially the details on ML have remained little known to a broader audience. In this contribution, learnings in VPHA are seen from the viewpoint of its voluntary coordinator (the author self) related to historical details of ALD as well as from an organizational viewpoint and some other viewpoints. Selected details related to ALD’s history not fully accurately described in three earlier review articles are pointed out. The work made in VPHA has resulted in journal articles, presentations and an exhibition, and VPHA has in part provided the foundation for granting the 2018 Millennium Technology Prize to Dr. Tuomo Suntola. At the time of writing this contribution, in July 2018, VPHA is still on-going, and more volunteers are welcome to join the effort.

History of atomic layer deposition and its relationship with the American Vacuum Society

2013 ◽  
Vol 31 (5) ◽  
pp. 050818 ◽  
Author(s):  
Gregory N. Parsons ◽  
Jeffrey W. Elam ◽  
Steven M. George ◽  
Suvi Haukka ◽  
Hyeongtag Jeon ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Layer Deposition ◽  
History Of ◽  
American Vacuum Society

Application of Atomic Layer Deposition in Dye-Sensitized Photoelectrosynthesis Cells

2021 ◽  
Vol 3 (1) ◽  
pp. 59-71
Author(s):  
Degao Wang ◽  
Qing Huang ◽  
Weiqun Shi ◽  
Wei You ◽  
Thomas J. Meyer
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Dye Sensitized ◽  
Layer Deposition

Workfunction of Al-Doped ZnO Films Deposited by Atomic Layer Deposition

2018 ◽  
Author(s):  
Peter George Gordon ◽  
Goran Bacic ◽  
Gregory P. Lopinski ◽  
Sean Thomas Barry
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Atomic Ratio ◽  
Aluminum Concentration ◽  
Zno Films ◽  
Transparent Conductor ◽  
Kelvin Probe ◽  
Layer Deposition ◽  
Earth Abundant ◽  
Doped Zno

Al-doped ZnO (AZO) is a promising earth-abundant alternative to Sn-doped In<sub>2</sub>O<sub>3</sub> (ITO) as an n-type transparent conductor for electronic and photovoltaic devices; AZO is also more straightforward to deposit by atomic layer deposition (ALD). The workfunction of this material is particularly important for the design of optoelectronic devices. We have deposited AZO films with resistivities as low as 1.1 x 10<sup>-3</sup> Ωcm by ALD using the industry-standard precursors trimethylaluminum (TMA), diethylzinc (DEZ), and water at 200<sup>◦</sup>C. These films were transparent and their elemental compositions showed reasonable agreement with the pulse program ratios. The workfunction of these films was measured using a scanning Kelvin Probe (sKP) to investigate the role of aluminum concentration. In addition, the workfunction of AZO films prepared by two different ALD recipes were compared: a “surface” recipe wherein the TMA was pulsed at the top of each repeating AZO stack, and a interlamellar recipe where the TMA pulse was introduced halfway through the stack. As aluminum doping increases, the surface recipe produces films with a consistently higher workfunction as compared to the interlamellar recipe. The resistivity of the surface recipe films show a minimum at a 1:16 Al:Zn atomic ratio and using an interlamellar recipe, minimum resistivity was seen at 1:19. The film thicknesses were characterized by ellipsometry, chemical composition by EDX, and resistivity by four-point probe.<br>

One-Dimensional TiO2@GaON Core-Shell Nanowires with Controlled Shell Thickness from Atomic Layer Deposition for Stable and Efficient Photoelectrochemical Water Splitting

2019 ◽  
Author(s):  
Jiajia Tao ◽  
Hong-Ping Ma ◽  
Kaiping Yuan ◽  
Yang Gu ◽  
Jianwei Lian ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Band Gap ◽  
Water Splitting ◽  
Atomic Layer ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoelectrochemical Performance ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Shell Nanowires

<div>As a promising oxygen evolution reaction semiconductor, TiO2 has been extensively investigated for solar photoelectrochemical water splitting. Here, a highly efficient and stable strategy for rationally preparing GaON cocatalysts on TiO2 by atomic layer deposition is demonstrated, which we show significantly enhances the</div><div>photoelectrochemical performance compared to TiO2-based photoanodes. For TiO2@20 nm-GaON core-shell nanowires a photocurrent density up to 1.10 mA cm-2 (1.23 V vs RHE) under AM 1.5 G irradiation (100 mW cm-2) has been achieved, which is 14 times higher than that of TiO2 NWs. Furthermore, the oxygen vacancy formation on GaON as well as the band gap matching with TiO2 not only provides more active sites for water oxidation but also enhances light absorption to promote interfacial charge separation and migration. Density functional theory studies of model systems of GaON-modified TiO2 confirm the band gap reduction, high reducibility and ability to activate water. The highly efficient and stable systems of TiO2@GaON core-shell nanowires provide a deeper understanding and universal strategy for enhancing photoelectrochemical performance of photoanodes now available. </div>

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