RESEARCH ARTICLE Van der Waals epitaxial growth and optoelectronics of a vertical MoS 2 /WSe 2 p–n junction Yu Xiao, Junyu Qu, Ziyu Luo, Ying Chen, Xin Yang, Danliang Zhang, Honglai Li, Biyuan Zheng, Jiali Yi, Rong Wu, Wenxia You, Bo Liu, Shula Chen, Anlian Pan 2022, ...