Ateneo Physics Talk: High energy efficiency solid-state optoelectronic devices based on III-Nitride semiconductor materials by DOST Balik Scientist Dr. Ryan G. Banal

by Christian Lorenz S. Mahinay

The Department of Physics of the School of Science and Engineering of Ateneo de Manila University cordially invites you to an open talk entitled High Energy Efficiency Solid-State Optoelectronic Devices based on III-Nitride Semiconductor Materials by Dr. Ryan G. Banal to be held at F106, Faura Hall, Ateneo de Manila University on Friday, 20 September 2019. 5:00 PM,


The use of conventional light sources such as incandescent bulbs and fluorescent lamps for general lighting and sodium vapor and halogen lamps for street lighting are still being widely used in the Philippines. These conventional light sources consume not only large amount of energy (high-power consumption), they are also less efficient and have short lifetime. They therefore contribute to the high energy consumption and huge economic losses. With an increasing energy demand due to high population growth and economic activities amidst the depletion of non-renewable energy resources, there is a need to utilize our energy resources effectively and efficiently.

In this presentation, I will discuss the various benefits of using high-efficiency optoelectronic devices for solid-state lighting. These device technologies include light-emitting diodes (LEDs) and laser diodes (LDs). The important breakthroughs in this research area will be introduced, including the important role of the III-Nitride semiconductor materials, which are aluminum nitride (AlN), gallium nitride (GaN), indium nitride (InN) and their ternary alloys (AlGaN and InGaN) for the realization of these technologies. The author’s contribution to the advancement of scientific knowledge in this research area will also be presented. Finally, the current challenges and future research directions using these semiconductor materials will be discussed.

About the Speaker

Dr. Ryan G. Banal is a DOST Balik Scientist Program awardee. He obtained his Doctor of Engineering degree at Electronics Science and Engineering, Kyoto University, Japan. He is currently an assistant manager at Sumitomo Electric Industries, Inc. at Itami-shi, Japan. He is an expert in AIGaN/AIN/InN electronic device manufacturing through chemical vapor deposition (CVD) processes, and semiconductor characterization.

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Physics News and Features from Ateneo de Manila University

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