Cutting-edge red light- emitting diodes by nitride semiconductors


Project Description

Nitride semiconductors are an excellent candidate for light-emitting devices because they canmakeallvisiblelights.Inprinciple,itispossibletosimultaneouslyfabricatetheLEDsof Red-Green-Blue primary colors, for instance, it is expected that micro-LED chips capable of displaying high contrast and full color indicating can be manufactured at lower cost. The micro-LED displays are expected as the next-generation after the OLED displays. However, it is well known that the nitride semiconductor red LEDs are quite challenging to develop. Our group found out the break-through to create the red LEDs and leads the research on it in theworld.The following topics are available for internship students.1.Opto-electricalcharacterizations2.DevicesimulationThe students will learn the various characteristics such as SEM, XRD, PL, AFM and so on. This project needs 3-6 months to be completed​
Program - Electrical Engineering
Division - Computer, Electrical and Mathematical Sciences and Engineering
Field of Study - ​Electrical Engineering, Applied Physics

About the

Kazuhiro Ohkawa

Professor, Electrical and Computer Engineering

Kazuhiro Ohkawa
​Professor Ohkawa‘s research
interests include science
and device application of energy-conversion
phenomena toward a more sustainable future. Promising applications are solid
state lighting and artificial photosynthesis. Ohkawa has refined MOVPE technique to the point
where only his MOVPE can grow specifically designed InGaN as an essential
component to fabricate efficient yellow- amber- and red-LEDs. InGaN is environmentally benign, and will
snatch the device field by arsenides and phosphides. He is also trying to
generate clean chemical energy from light energy by using nitride photocatalyst
he invented. It is so-called artificial photosynthesis which produces not only
H2 from H2O reduction but also HCOOH, CH4 and
C2H5OH from CO2 reduction. Efficiency of
nitride photosynthesis is already greater than average of biological
photosynthetic one.

Desired Project Deliverables

​The internship students will learn the opto-electrical knowledge through the development of red-LEDs by nitride semiconductorsThe students are expected to work full-time. The results are utilized for publications. The students attend weekly meetings with the Faculty Advisor