Sign in Subscribe
Electronics industry

Room-Temperature Charge Localization in Ion-Coupled Bilayer Transistors

Strategic Insights

— 1 min read

Researchers at the University of Chicago have made a groundbreaking discovery in the field of electronics, revealing the ability to control the localization of mobile charges in solids at room temperature. This breakthrough has significant implications for the development of next-generation electronics. By utilizing an ion gate, the team was able to selectively populate either localized molecular states or semiconductor band states, achieving complete localization of mobile charges at densities up to 3 ? 10 per square centimeter.

Key Takeaways:

  • The researchers used an ion gate to control the localization of mobile charges in high-quality bilayer transistors, comprising a monolayer of molecular crystal on top of a monolayer semiconductor.
  • The transition was energetically stabilized by the formation of coupled electron-ion dipoles, which could be tuned through Coulomb engineering.
  • The study achieved single-band ambipolar transistor operation without substitutional dopants, demonstrating the potential of electron-ion correlations for practical electronic applications.
  • The team discovered that the properties enabled by this control, such as correlated electron-ion dipoles, can be harnessed for the development of future electronic devices.
  • Hanyu Hong, lead researcher, stated that the use of an ion gate allows for the selective population of either localized molecular states or semiconductor band states, achieving complete localization of mobile charges.
  • The study included a team of researchers from the University of Chicago, including Mengyu Gao, Sicheng Fan, Tomojit Chowdhury, Zehra Naqvi, Jingyuan Ge, Ce Liang, Yu Han, Nathan P. Guisinger, Yuqing Qiu, Dong Hyup Kim, Suriyanarayanan Vaikuntanathan, Chong Liu, and Jiwoong Park.

Statistics:

  • The localization of mobile charges was achieved at densities up to 3 ? 10 per square centimeter.
  • The study enabled single-band ambipolar transistor operation without substitutional dopants.
  • The research was peer-reviewed and published in Science.
  • The study was conducted at the University of Chicago, with researchers from various departments.

Sources:

  • "Room-temperature charge localization in ion-coupled bilayer transistors." Science, 2025;390(6771):356-360.
  • Hanyu Hong, Dept. of Chemistry, University of Chicago.
  • Amer Assoc Advancement Science, 1200 New York Ave, NW, Washington, DC 20005, USA.

Read more