Open AccessSubstrate-dependent Growth of CH3NH3PbI3 Films Deposited by Vacuum Evaporation
Author(s) -
Ying Lü,
Qing Han,
Yuan Zhao,
Chao Yang,
Youzhen Li,
Xiaoliang Liu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1637/1/012080
Subject(s) - x ray photoelectron spectroscopy , materials science , raman spectroscopy , indium tin oxide , pedot:pss , substrate (aquarium) , photoluminescence , thin film , vacuum evaporation , evaporation , indium , vacuum deposition , analytical chemistry (journal) , photoemission spectroscopy , ultraviolet photoelectron spectroscopy , chemical engineering , layer (electronics) , nanotechnology , optoelectronics , chemistry , optics , organic chemistry , oceanography , physics , geology , thermodynamics , engineering
CH 3 NH 3 PbI 3 (MAPbI 3 ) films were prepared by dual-source vacuum evaporation on Au, poly(3,4-ethylenedioxythiophene) (PEDOT), and indium-tin-oxide(ITO) with the similar deposition parameters. The films were characterized with X-ray diffraction (XRD), steady-state photoluminescence (PL) and Raman spectroscopy. The interface electronic structures of co-evaporated MAPbI 3 films on different substrates were studied with ultraviolet photoemission spectroscopy (UPS) and X-ray photoemission spectroscopy (XPS). The research indicates that Au is more suitable for the film growth than the other substrates, especially when the film is very thin. The poor adsorption of the precursors may make it difficult to form MAPbI 3 thin film on ITO. Furthermore, it is found that the charge transfer efficiency at the interface between PEDOT and MAPbI 3 is relatively high, which indicates that PEDOT can act as an effective hole transport layer for MAPbI3-based devices.