Passivated Interfacial Traps of Monolayer MoS2 with Bipolar Electrical Pulse

Po Han Chen, Chun An Chen, Yu Ting Lin, Ping Yi Hsieh, Meng Hsi Chuang, Xiaoze Liu, Tung Ying Hsieh, Chang Hong Shen, Jia Min Shieh, Meng Chyi Wu, Yung Fu Chen, Chih Chao Yang, Yi Hsien Lee

研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)


Heterogeneous integration of monolayers is an emergent route of spatially combining materials with available platforms for unprecedented properties. A long-standing challenge along this route is to manipulate interfacial configurations of each unit in stacking architecture. A monolayer of transition metal dichalcogenides (TMDs) offers an embodiment of studying interface engineering of integrated systems because optoelectronic performances generally trade off with each other due to interfacial trap states. While ultrahigh photoresponsivity of TMDs phototransistors has been realized, a long response time commonly appears and hinders applications. Here, fundamental processes in excitation and relaxation of the photoresponse are studied and correlated with interfacial traps of the monolayer MoS2. A mechanism for the onset of saturation photocurrent and the reset behavior in the monolayer photodetector is illustrated based on device performances. Electrostatic passivation of interfacial traps is achieved with the bipolar gate pulse and significantly reduces the response time for photocurrent to reach saturated states. This work paves the way toward fast-speed and ultrahigh-gain devices of stacked two-dimensional monolayers.

頁(從 - 到)10812-10819
期刊ACS Applied Materials and Interfaces
出版狀態已出版 - 1 3月 2023


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