Author(s): Li, X (Li, Xiang); Yang, TT (Yang, Tingting); Liu, YQ (Liu, Yangqi); Liu, JY (Liu, Jingyu); Liu, B (Liu, Bin); Lv, LF (Lv, Longfeng); Hou, YB (Hou, Yanbing); Zhang, Y (Zhang, Yan); Shen, JL (Shen, Jingling); Zhang, B (Zhang, Bo)

Source: JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 54 Issue: 32 Article Number: 325102 DOI: 10.1088/1361-6463/ac000d Published: AUG 12 2021

Abstract: Ultrafast carrier response of perovskite/MoO3/graphene heterostructure was investigated by optical-pump terahertz (THz) probe spectroscopy. The high work function of MoO3 changes the tunable graphene Fermi level via hole doping. Compared with monolayer graphene, it generates a more negative photoconductivity and enables ultra-fast THz functional manipulation. The subsequent THz signal decrease is related to hot-carrier cooling and the carrier concentration contributed by the CH3NH3PbI3 layer. The charge transfer and recombination reduce the positive conductance of the hybrid structure relative to that of neat CH3NH3PbI3.

Accession Number: WOS:000657105300001

ISSN: 0022-3727

eISSN: 1361-6463

Full Text: https://iopscience.iop.org/article/10.1088/1361-6463/ac000d