In order to learn more about the concept and knowledge of “manufacturing technology,” which is a relatively rare subject in my research area of quantum chemistry, I spent four weeks at a solid-state reaction chemistry laboratory for the program “Interdisciplinary Lab Visits.” An organic electroluminescence device emits light when positive holes and electrons injected from electrodes are recombined. My goal is to form a pattern of transparent electrodes with laser-drawn photolithography and reactive-ion etching, as well as to acquire techniques in vacuum deposition of positive-hole transport layers, light-emitting layers, and metal cathodes. The wiring under the binocular stereoscopic microscope was, in particular, a race against time due to the degradation from moisture in the air. Despite great challenging at times, it was a meaningful lab experience that allowed me to learn the basics of light-emitting elements.

Makito Takagi , 1st-term Student , Graduate School of Chemical Sciences and Engineering