PKUのドープ研究がより強力な半導体と電子機器への扉を開く（‘Dope’ PKU research opens door to more powerful semiconductors and electronic devices）

2025-05-29 北京大学(PKU)

Light-triggered doping of organic semiconductors. (a) Light-triggered doping mechanism and designed dopants. (b) Organic semiconductors. (c) Schematics of the light-triggered regionally controlled doping method.

＜関連情報＞

• https://newsen.pku.edu.cn/news_events/news/research/14960.html
• https://www.nature.com/articles/s41586-025-09075-y

有機半導体の光トリガーによる領域制御nドーピング Light-triggered regionally controlled n-doping of organic semiconductors

Xin-Yi Wang,Yi-Fan Ding,Xiao-Yan Zhang,Yang-Yang Zhou,Chen-Kai Pan,Yuan-He Li,Nai-Fu Liu,Ze-Fan Yao,Yong-Shi Chen,Zhi-Hao Xie,Yi-Fan Huang,Yu-Chun Xu,Hao-Tian Wu,Chun-Xi Huang,Miao Xiong,Li Ding,Zi-Di Yu,Qi-Yi Li,Yu-Qing Zheng,Jie-Yu Wang & Jian Pei
Nature  Published:28 May 2025
DOI:https://doi.org/10.1038/s41586-025-09075-y

Abstract

Doping is a primary method to modulate the electrical properties of semiconductors, enabling the fabrication of various homojunctions/heterojunctions and complex devices^{1,2,3,4,5,6,7,8}. For organic semiconductors (OSCs), the electrical performance has been extensively improved by developing doping methods and dopants^{9,10,11,12,13}. However, compared with the state-of-the-art spatial resolution of inorganic semiconductor fabrication processes, OSCs lag far behind, limiting the construction of complex organic electronic devices⁵. Here we present a facile light-triggered doping strategy and develop a series of inactive photoactivable dopants (iPADs) for regionally controlled n-doping of OSCs. By converting iPADs into active dopants through ultraviolet (UV) exposure, controllable doping of various n-type OSCs with high electrical conductivity greater than 30 S cm⁻¹ has been realized. Using iPADs can substantially improve the performances of OSCs in transistors, logic circuits and thermoelectrics. Also, regionally controlled doping is demonstrated in OSCs with a record resolution down to 1 μm. Overall, our strategy has achieved tunable doping levels in OSCs with high spatial resolution, which is expected to be highly suited for integrated circuits in both roll-to-roll and laboratory-scale environments.