(2023) Toward White LED Light with a New Substrate

Wisconsin MRSEC researchers have developed a new way to synthesize one possible substrate, ScAlMgO4, by depositing it at low temperature, then crystallizing it. Now, the team has developed the ability to grow high-In InGaN on top of ScAlMgO4 using the industry-standard metal-organic chemical vapor deposition process. The films are smoother than films grown on free-standing ScAlMgO4 substrates, which is a critical prerequisite to devices including LEDs, other optoelectronics, and highspeed electronics. The team has developed an InGaN-based green LED device on a conventional substrate that will yield yellow to red light when grown at higher In content on ScAlMgO4.

Roemig Wins Best Poster Award at Pittsburgh Diffraction Conference

Simon Roemig’s poster presenting research resulting from a collaboration between the Wisconsin MRSEC and the Wisconsin-Puerto Rico Partnerships for Research and Education in Materials (PREM) was presented with the Chung Soo Yoo Best Poster award at the 79th Annual Pittsburgh Diffraction Conference at Argonne National Laboratory in October 2022.

Nominee for Excellence in Graduate Polymer Research Presents at ACS Spring 2022

Jian Sun, A graduate student in Materials Science and Engineering in Professor Padma Gopalan’s lab was nominated in the category of Excellence in Graduate Polymer Research under the division of Polymer Chemistry at ACS Spring 2022. As a nominee, Sun presented on the recently published work, “Synthesis of High Etch Contrast Poly(3-hydroxystyrene)-based Triblock Copolymers for Sub-5 nm Features.” Sun’s travel to the conference was supported through the MRSEC Honored Scholar Travel Award.