講演情報
[15p-P05-60]Tailoring the electronic properties of 2D materials via diversified molecular adlayer
〇Mao Xu1, Chen Li1, Daisuke Kiriya1 (1.The Univ. of Tokyo)
キーワード：
Transition metal dichalcogenides (TMDCs)、Molecular adlayer motifs、Electronic property modulation
Inorganic 2D semiconductors, typified by atomically thin layered transition metal dichalcogenides (TMDCs), offer a unique combination of electronic, optical, and mechanical properties, making them promising alternatives for a wide range of applications. Therein, a critical requirement for the development of practical and reliable electronic devices based on TMDCs lies in accomplishing the control over their carrier polarity and doping level. In this context, although impressive advances have been made in tuning the electronic properties of TMDCs using non-disruptive molecule/TMDC heterostructures at the atomic scale, precise control of the molecular arrangement for fine-tuning the electronic properties in specific regions of TMDC surfaces remains a tricky challenge, which is crucial for manufacturing p–n junctions and transistors with reproducible electrical characteristics. Therefore, this work focused on the control of molecular adlayers (e.g. triphenylphosphine (PPh3)) on TMDCs (e.g. MoS2) to investigate the correlation between the surface motif and the electrical property modulation in the heterostructures, where localized doping was achieved by charge transfer from the lone pairs of different PPh3 motifs.