There is still a long way to go to improve external quantum efficiency
Previously, French semiconductor material company Soitec, which has the ability to mass-produce InGaN-based red micro LED chips, released 50-micron InGaN-based red micro LED devices in 2020. However, Shubhra Pasayat, a spokesperson for the UCSB team, pointed out that Soitec No data on external quantum efficiency has been released.
Pasayat said that Micro LEDs smaller than 10 microns are critical to the viable commercialization of the Micro LED industry. At the same time, in addition to the small size, the external quantum efficiency of the Micro LED chip must be at least 2-5% to meet the requirements of the Micro LED display.
However, the external quantum efficiency of the InGaN-based red Micro LED chip displayed by UCSB this time is only 0.2%. In this regard, Pasayat said frankly that although the current research results of the team are far from reaching the goal, the relevant research work has entered the preliminary stage and substantive progress can be expected in the future.
The next goal of the UCSB team is to improve the external quantum efficiency of the red light Micro LED chip. It is currently planning to improve the quality of the materials and improve the production steps.
