113學年材料所-第十一週 專題研討課程 演講公告 (114年5月1日)
2025.04.23
演講題目:
Tuning Electronic and Optical Functions in 2D Semiconductors via Molecular Doping
演講者: 周至品助理教授(Prof. Jyh-Pin Chou)
現職: 國立臺灣大學 重點科技學院 助理教授
時間: 114年05月01日(四) 下午15:20~17:10
地點: 成功大學成功校區三系館 鋼構區(3F)共同教室A1302演講廳
內容摘要:
Understanding and controlling the electronic properties of two-dimensional (2D) materials is pivotal for their integration into future nanoelectronic and optoelectronic devices. While monolayer silicon carbide (SiC) offers a unique platform combining wide bandgap semiconducting behavior with chemical robustness, its tunability via non-destructive molecular doping introduces new functional possibilities. In our recent study, we demonstrated how charge-transfer interactions between organic dopants and 2D SiC can systematically induce n-type or p-type behavior, modulate work functions, and significantly enhance visible-light absorption, all of which are further controllable under external electric fields. Looking beyond SiC, the same molecular doping strategies and theoretical insights offer a generalizable framework applicable to a wide class of 2D transition metal dichalcogenides (TMDs), such as MoS2 and WS2. These materials exhibit stronger spin-orbit coupling, direct-to-indirect bandgap transitions, and highly anisotropic optical responses—features that can be further harnessed through molecular engineering. This talk will highlight the mechanistic principles uncovered in our SiC system and discuss how they pave the way for rational interface design in TMD-based heterostructures, especially in the context of tunable photodetection, valleytronics, and excitonic devices.
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