Ultrafast interlayer photocarrier transfer in graphene–MoSe2 van derWaals heterostructure
Zhang Xin-Wu, He Da-Wei, He Jia-Qi, Zhao Si-Qi, Hao Sheng-Cai, Wang Yong-Sheng, Yi Li-Xin †
       

The electric field of the excitons in MoSe2 before and after forming the heterostruture.