近日，美国芝加哥大学Jiwoong Park团队研究了离子耦合双层晶体管的室温电荷局域化。这一研究成果发表在2025年10月23日出版的《科学》杂志上。

控制固体中移动电荷的定位可以发现相关物理现象，但将其应用于下一代电子产品的开发需要在实际条件下实现这种控制。

在这项工作中，研究组报告了在高质量的双层晶体管中室温、可切换电荷的定位，这种晶体管包括单层分子晶体在单层半导体上的单层。通过应用离子门，研究组选择性地填充局部分子态或半导体带态，实现了密度高达3 × 10¹³/平方厘米的移动电荷完全定位。这种跃迁通过形成耦合的电子-离子偶极子而在能量上稳定下来，可通过库仑工程来调谐。这些特性进一步使单波段双极性晶体管在没有替代掺杂剂的情况下工作，证明了电子-离子相关性在实际电子应用中的潜力。

附：英文原文

Title: Room-temperature charge localization in ion-coupled bilayer transistors

Author: Mengyu Gao, Hanyu Hong, Sicheng Fan, Tomojit Chowdhury, Zehra Naqvi, Jingyuan Ge, Ce Liang, Yu Han, Nathan P. Guisinger, Yuqing Qiu, Dong Hyup Kim, Suriyanarayanan Vaikuntanathan, Chong Liu, Jiwoong Park

Issue&Volume: 2025-10-23

Abstract: Controlling the localization of mobile charges in solids enables the discovery of correlated physical phenomena, but applying it for the development of next-generation electronics requires achieving such control under practical conditions. In this study, we report room-temperature, switchable charge localization in high-quality bilayer transistors that comprise a monolayer of molecular crystal on top of a monolayer semiconductor. By using an ion gate, we selectively populated either localized molecular states or semiconductor band states, achieving complete localization from mobile charges at densities up to 3 × 1013 per square centimeter. This transition was energetically stabilized by the formation of coupled electron-ion dipoles, which could be tuned through Coulomb engineering. These properties further enabled single-band ambipolar transistor operation without substitutional dopants, demonstrating the potential of electron-ion correlations for practical electronic applications.

DOI: ady7969

Source: https://www.science.org/doi/10.1126/science.ady7969