News

May 2020

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  COMPOUND SEMICONDUCTOR featured the results from APL papers

  1 min read · Mon, May 4 2020

  News

  ​Compound Semiconductor is a general journal of the United Kingdom and is widely read by engineers in the fields of optoelectronics and electronic devices. The article focused on our research results about over 630-nm red LEDs. The output power, low operating voltage, high stability temperature are the important milestones in this field. Link: https://compoundsemiconductor.net/article/111154/KAUST_Team_Improves_High_Power_InGaN_Red_LEDs​ed_LEDs

April 2020

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  COMPOUND SEMICONDUCTOR announced a result from ECO Device Lab as an article

  1 min read · Mon, Apr 27 2020

  News

  Compound Semiconductor is a general journal of the United Kingdom and is widely read by engineers in the fields of optoelectronics and electronic devices. The journal focused on our research result about 665-nm LEDs since the emission peak wavelength and the low voltage are the important milestones in this field. See the article on page 68 in Compound Semiconductor volume 26 issue 2 March 2020. Link: https://data.angel.digital/pdf/Compound%20Semiconductor%20Issue%202%20March%202020%20-%20Online.pdf​
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  Effects of size on the electrical and optical properties of InGaN-based red light-emitting diodes

  1 min read · Tue, Apr 14 2020

  News

  ​The paper entitled "Effects of size on the electrical and optical properties of InGaN-based red light-emitting diodes" reports the investigation of the effect of red LED chip size. It confirmed the specific feature of larger or smaller chip sizes. we obtained the high characteristic temperature of 399 K and the small redshift tendency of 0.066 nmK-1​.​ This paper has been ​chosen as an Editor's Pick. Congratulations!​ Appl. Phys. Lett. 116, 173501 (2020). ​DOI: 10.1063/5.0006910​
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  Paper accepted in Journal of Applied Physics (JAP)

  1 min read · Sat, Apr 11 2020

  News

  The paper entitled "Boron influence on band-gap and photoluminescence in BGaN grown on AlN" reports the investigation of the born influence on the bandgap in GaN measured by contactless electroreflectance (CER) spectroscopy. This work is an international collaboration with Prof. Hommel group in Poland.​ Journal of Applied Physics 127, 165703 (2020). DOI: 10.1063/1.5140413​​​
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  Graduate Seminar: Blue LED material extended to Green, Yellow, and now Red

  1 min read · Sun, Apr 5 2020

  News

  Abstract Energy is an indispensable part of our lives. Many scientists and engineers in the world are trying to develop many and different types of devices for energy saving and clean energy generation. Semiconductor technologies can contribute to developing those energy-saving & -generation devices. Energy Conversion Devices and Materials (ECO Devices) Laboratory at KAUST is focusing on the development of efficient novel light emitters and clean-energy generation systems using photocatalytic phenomena. The former devices are based on MOCVD technology and material sciences. The later system is

March 2020

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  633-nm InGaN-based red LEDs grown on thick underlying GaN layers with reduced in-plane residual stress

  1 min read · Tue, Mar 31 2020

  News

  ​​The paper entitled "633-nm InGaN-based red LEDs grown on thick underlying GaN layers with reduced in-plane residual stress" reports the reduction of the in-plane compressive stress in the underlying GaN layers was shown to be crucial for enhancing the light-output power of InGaN-based red LEDs on conventional sapphire substrates.​​ Appl. Phys. Lett. 116, 162101 (2020). DOI: 10.1063/1.5142538​ ​​
• 

  Optimal ITO transparent conductive layers for InGaN-based amber/red light-emitting diodes

  1 min read · Mon, Mar 30 2020

  News

  The paper entitled "Optimal ITO transparent conductive layers for InGaN-based amber/red light-emitting diodes" reports the optimal double ITO layers on InGaN-based amber and red LEDs enhanced light output power by 15.6% and 13.0%, respectively, compared to those using ITO layers by e-beam evaporation.​ Optics Express 28, 12311 (2020). DOI: 10.1364/OE.389725​​
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  Energy transport analysis in a Ga0.84In0.16N/GaN heterostructure using microscopic Raman images employing simultaneous coaxial irradiation of two lasers

  1 min read · Fri, Mar 20 2020

  News

  The paper entitled "Energy transport analysis in a Ga0.84In0.16N/GaN heterostructure using microscopic Raman images employing simultaneous coaxial irradiation of two lasers" reports the pump and probe method in Raman spectroscopy is valid for analyzing energy or heat transport across the heterointerface. This paper has been ​chosen as an Editor's Pick. Congratulations! This work is an international collaboration with Prof. Ishitani group at Chiba University.​​ ​Applied Physics Letters 116, 142107 (2020); DOI: 10.1063/5.0003491​​

January 2020

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  Paper accepted in Applied Physics Express (APEX) & Ranked in "MOST READ"

  1 min read · Wed, Jan 29 2020

  News

  The paper entitled "Demonstration of low forward voltage InGaN-based red LEDs" reports the 665-nm peak red emission from InGaN-based LEDs at 20 mA under very low operation voltage 2.5 V. This paper has ranked in "MOST READ".​ Congratulations! ​Applied Physics Express 13, 031001 (2020). DOI: 10.35848/1882-0786/ab7168​​

July 2019

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  Welcome Dr. Zhe

  1 min read · Wed, Jul 31 2019

  News

  ECO Devices welcomes new Postdoc Zhe Zhuang!
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  Paper accepted in Energy Technology (Wiley)

  1 min read · Fri, Jul 5 2019

  News

  ​The paper entitled “A Stand-Alone Module for Solar-Driven H2 Production Coupled with Redox-Mediated Sulfide Remediation ” reports successful H2S splitting into solid sulfur and hydrogen gas. H2S is toxic gas in crude oil plants. This is an international collaboration including KAUST and Aramco.​ Energy Technology 7, 1900575 (2019). DOI: 10.1002/ente.201900575
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  KAUST Photonics Summer Camp 2019 Starts

  1 min read · Mon, Jul 1 2019

  News

  ​Photonics Summer Camp will be held until July 31​.

June 2019

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  Welcome Mohammed

  1 min read · Thu, Jun 27 2019

  News

  ​ECO Devices welcomes new PhD student​ Mohammed Najmi​​​!
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  Welcome Pavel and Artem

  1 min read · Thu, Jun 20 2019

  News

  ECO Devices welcomes new PhD students Pavel Kirilenko and Artem Shushanian​​​!
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  KAUST Professor Kazuhiro Ohkawa elected Fellow of the Japan Society of Applied Physics

  1 min read · Tue, Jun 18 2019

  Spotlight News

  semiconductors nitride photocatalyst artificial photosynthesis Laser Diodes

  By David Murphy, KAUST News KAUST Professor of Electrical Engineering Kazuhiro Ohkawa was recently elected as a Fellow of the Japan Society of Applied Physics (JSAP). The JSAP was established in 1930 as a voluntary forum for applied physics researchers in the country. Ohkawa's JSAP peers recognized him for his exceptional contributions to the progression of applied physics and his specific contribution to the "development of wide bandgap semiconductor epitaxial growth and optical devices," JSAP stated. "It is a great honor for me to be elected as a Fellow of the JSAP," Ohkawa noted. "The

April 2019

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  Graduate Seminar: InGaN-based light-emitting devices

  1 min read · Sun, Apr 28 2019

  News

  Abstract III-Nitride-based light-emitting diodes (LEDs) are already commercialized for instance blue and green LEDs. It is very contributed as energy saving light source all over the world. This material is a very attractive material, capable of the emitting range is not only blue light but also UV and visible light. Moreover, application as a power device is also possible, it is one of the materials considered to lead the energy saving society in the future. Visible light LED has a wide range of applications. Visible light LED has a wide range of applications. we expect that there is some

March 2019

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  Influence of polymerization among Al- and Ga-containing molecules on growth rate and Al content in AlGaN

  1 min read · Thu, Mar 21 2019

  News

  The paper entitled “Influence of polymerization among Al- and Ga-containing molecules on growth rate and Al content in AlGaN” indicates the AlGaN growth mechanism. AlGaN is one of key materials for light-emitters and electronic devices. Journal of Crystal Growth 516, pp.17–20 (2019). DOI: 10.1016/j.jcrysgro.2019.03.023
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  Photoelectrochemical H2 generation from water using a CoOx/GaN photoelectrode

  1 min read · Wed, Mar 6 2019

  News

  The paper entitled “Photoelectrochemical H2 generation from water using a CoOx/GaN photoelectrode" announced a new co-catalyst for GaN photocatalyst. Japanese Journal of Applied Physics 58, SCCC23 (2019). DOI: https://doi.org/10.7567/1347-4065/ab0f1d​​
• 

  Paper accepted in Nano Energy

  1 min read · Sat, Mar 2 2019

  News

  The paper entitled “Photoelectrochemical hydrogen generation using graded In-content InGaN photoelectrode structures" proposed an effective nano-structure. Nano Energy 59, pp.569–573 (2019). DOI: j.nanoen.2019.03.011

February 2019

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  Congratulation! Arwa won IBDA’A 5th place and special awards

  1 min read · Tue, Feb 19 2019

  News

  Arwa has earned 5th places and special awards in the IBDA’A National Olympiads, which took place in Riyadh. ​
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  Investigation of the p-GaN layer thickness of InGaN-based photoelectrodes for photoelectrochemical hydrogen generation

  1 min read · Fri, Feb 8 2019

  News

  The paper entitled “Investigation of p-GaN layer thickness of InGaN-based photoelectrode for photoelectrochemical hydrogen generation” mentioned the enhancement of energy conversion efficiency by band engineering. Japanese Journal of Applied Physics 58, SCCC32 (2019). DOI: https://doi.org/10.7567/1347-4065/ab09d7​​​
• 

  Metalorganic vapor-phase epitaxial growth simulation to realize high-quality and high-In-content InGaN alloys

  1 min read · Fri, Feb 8 2019

  News

  The paper entitled “Metalorganic vapor-phase epitaxial growth simulation to realize high-quality and high-In-content InGaN alloys” will inspire InGaN MOVPE growth and their LED applications. DOI: ​ 10.1016/j.jcrysgro.2019.02.018​

January 2019

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  Thank you, Linping Qu!

  1 min read · Mon, Jan 28 2019

  News

  Internship student Linping Qu leaves. Thank you very much!​

December 2018

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  Prof. Ohkawa has delivered a seminar in Xiamen University, China

  1 min read · Tue, Dec 25 2018

  News

  Prof. Ohkawa has delivered a talk about Development of Nitride Photocatalyst.
• 

  Prof. Ohkawa has delivered a invited talk in The technical meeting of Solid State Physics and Application Division, Japanese Society of Applied Physics, Tokyo, Japan

  1 min read · Mon, Dec 17 2018

  News

  Prof. Ohkawa has delivered a talk about clean energy generation by semiconductor photoelectrodes.
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  Prof. Ohkawa has delivered a invited talk in International workshop on UV materials and Devices 2018, Kunming, China

  1 min read · Mon, Dec 10 2018

  News

  We succeeded to explain AlGaN MOVPE growth mechanism.

November 2018

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  Daisuke's talk in IWN2018

  1 min read · Thu, Nov 15 2018

  News

  Daisuke has delivered the talk about the band engineering of an InGaN-based photocatalyst in International Workshop on Nitride Semiconductors 2018 (IWN2018). He designed the band structure of the material for improving the photoelectrochemical hydrogen generation from water. ​
• 

  Great News! Daisuke's invited talk in IWN2018

  1 min read · Tue, Nov 13 2018

  News

  Daisuke has delivered the invited talk in International Workshop on Nitride Semiconductors 2018 (IWN2018). He explained about the state-of-the-art high In content InGaN-based amber, orange, and red LEDs.​​
• 

  Prof. Ohkawa has delivered a invited talk in Clean Energy Generation by Artificial Photosynthesis Based on Semiconductor Technology 28th Annual Saudi-Japan Symposium 2018

  1 min read · Mon, Nov 12 2018

  News

  Prof. Ohkawa has delivered a talk about clean energy generation by semiconductor photoelectrodes.
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  Martin has delivered the poster presentation in IWN2018

  1 min read · Mon, Nov 12 2018

  News

  Martin has delivered the poster presentation in International Workshop on Nitride Semiconductors 2018 (IWN2018). This is the first time for him presented at an international conference. He discovered a new co-catalyst for nitride photocatalysts to split water into clean hydrogen and oxygen.

October 2018

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  Prof. Ohkawa has delivered a invited talk in 15th China International Forum on Solid State Lighting & 2018 International Forum on Wide Bandgap Semiconductors

  1 min read · Wed, Oct 24 2018

  News

  Prof. Ohkawa has delivered a talk about solid-state lighting and related nitride MOVPE growth.
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  MOCVD growth starts

  1 min read · Tue, Oct 9 2018

  News

  ECO Devices Lab starts to grow III-Nitride materials by MOCVD. ​​

August 2018

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  Prof. Ohkawa has delivered a seminar in Polish Center for Technology Development, Wroclaw, Poland.

  1 min read · Mon, Aug 13 2018

  News

  Prof. Ohkawa has delivered a talk about AlGaN MOVPE growth and simulation.
• 

  Prof. Ohkawa has delivered a talk in 7th International Symposium on Growth of III-Nitrides.

  1 min read · Tue, Aug 7 2018

  News

  We have succeeded to simulate AlGaN MOVPE growth considering the polymer formation between Al- and Ga-related molecules.

July 2018

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  Prof. Ohkawa has delivered a seminar in School of Crystals Science and Technology, Japanese Society of Applied Physics, Tokyo University of Agriculture and Technology

  1 min read · Tue, Jul 31 2018

  News

  Prof. Ohkawa has delivered a talk about fundamental III-nitrides MOVPE growth.
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  Marie Sklodowska-Curie Fellowships in Photonics @ CEMSE – call 4 - 2018

  1 min read · Tue, Jul 17 2018

  News

  FD-MIMO communications cognitive radio systems MOVPE laser solar hydrogen biophotonics bioimaging 3D printing

  A group of professors working in the area of photonics at KAUST, most of them with CEMSE Division, offer hosting of outgoing Marie Sklodowska-Curie Fellowships in their research groups within the EU H2020 COFUND Postdoctoral Fellowship Programme MULTIPLY.
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  KAUST Photonics Summer Camp 2018 Starts

  1 min read · Sun, Jul 1 2018

  News

  Photonics Summer Camp will be held until July 31.​​

June 2018

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  Prof. Ohkawa has delivered a talk in 19th International Conference on Metalorganic Vapor Phase Epitaxy

  1 min read · Mon, Jun 4 2018

  News

  We have found out the growth mechanism of InGaN in MOCVD and their application to grow full-color InGaN LEDs.

March 2018

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  Visit of Professors from Japan

  1 min read · Fri, Mar 23 2018

  News

  Scientific discussion Professors always like to discuss anything

February 2018

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  Visit of Tomohiro Yamamoto from SoftBank, Japan

  1 min read · Tue, Feb 27 2018

  News

  From SoftBank, Japan! Tomohiro Yamamoto is an alum of Ohkawa’s group.​​​​
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  Okonomiyaki Workshop at Daisuke Iida House

  1 min read · Sat, Feb 3 2018

  News

  As a small relax activity from hard work, Research Scientist Daisuke Iida offered traditional Japanese food at his house for the ECO Devices members.

January 2018

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  ECO Devices participates in the KAUST Winter Enrichment Program (WEP) 2018 Science Fair

  1 min read · Tue, Jan 23 2018

  News

  ​Students Liang Zhang and Martin Velazquez took part in the KAUST WEP 2018 Science Fair showing a photocatalytic water splitting cell. ​

December 2017

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  Welcome Kuang

  1 min read · Wed, Dec 13 2017

  News

  ​ECO Devices welcomes Kuang-Sheng Ho to the research group. He joins as a Master Student​

August 2017

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  Welcome Liang and Martin

  1 min read · Mon, Aug 7 2017

  News

  ECO Devices welcomes Liang Zhang and Martin Velazquez-Rizo, new MS and PhD students respectively, that incorporate our Research Group​​​
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  Welcome Yuta

  1 min read · Thu, Aug 3 2017

  News

  ​Yuta Nakayama arrives as a Visiting Student from Kobe University in Japan

July 2017

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  KAUST Photonics Summer Camp 2017 Starts

  1 min read · Sun, Jul 16 2017

  News

  Photonics Summer Camp will be held until August 10​​

May 2017

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  Visit of Nobel Laureate, Shuji Nakamura, to ECO Devices Lab

  1 min read · Thu, May 18 2017

  News

  ​Visit of Nobel Laureate, Professor Shuji Nakamura (UCSB) to KAUST​​

April 2017

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  Welcome Dr. Daisuke

  1 min read · Thu, Apr 13 2017

  News

  ​ECO Devices welcomes Daisuke Iida as a Research Scientist.​​​

November 2016

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  Welcome Jose

  1 min read · Fri, Nov 11 2016

  News

  ECO Devices welcomes Jose Maria Silva Corrugedo. He is the first staff member.

October 2016

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  Daisuke's paper published in Applied Physics Express

  1 min read · Wed, Oct 12 2016

  News

  D. Iida, K. Niwa, S. Kamiyama, and K. Ohkawa, “Demonstration of InGaN-based orange LEDs with hybrid multiple-quantum-wells structure“, Appl. Phys. Express 9, 111003 (2016).