The photoresponsivity of monolayer molybdenum disulfide grown by chemical vapor deposition with different seeding promoters

摘要

The performance of photodetectors based on monolayer transition-metal dichalcogenides (TMDCs) varies greatly, even for the same type of devices made of the same material. Here, we compared the performance of phototransistors based on monolayer MoS2 grown by chemical vapor deposition (CVD) with different seeding promoters of perylene-3,4,9,10-tetracarboxylic acid tetrapotassium salt (PTAS), copper phthalocyanine (CuPc), and crystal violet, respectively. The device based on MoS2 grown with PTAS has the highest photoresponsivity. This work implies the selection of seeding promoters during the CVD growth of monolayer TMDCs will affect the photodetectors characteristics, which is very important to their applications in optoelectronics. (C) 2020 The Japan Society of Applied Physics