In:
Chinese Physics B, IOP Publishing, Vol. 30, No. 6 ( 2021-06-01), p. 066801-
Kurzfassung:
One-dimensional nanowire is an important candidate for lead-halide perovskite-based photonic detectors and solar cells. Its surface population, diameter, and growth direction, etc. , are critical for device performance. In this research, we carried out a detailed study on electron transfer process at the interface of nanowire CH 3 NH 3 PbI 3 (N-MAPbI 3 )/Phenyl C61 butyric acid methyl-ester synonym (PCBM), as well as the interface of compact CH 3 NH 3 PbI 3 (C-MAPbI 3 )/PCBM by transient absorption spectroscopy. By comparing the carrier recombination dynamics of N-MAPbI 3 , N-MAPbI 3 /PCBM, C-MAPbI 3 , and C-MAPbI 3 /PCBM from picosecond (ps) to hundred nanosecond (ns) time scale, it is demonstrated that electron transfer at N-MAPbI 3 /PCBM interface is less efficient than that at C-MAPbI 3 /PCBM interface. In addition, electron transfer efficiency at C-MAPbI 3 /PCBM interface was found to be excitation density-dependent, and it reduces with photo-generation carrier concentration increasing in a range from 1.0 × 10 18 cm −3 –4.0 × 10 18 cm −3 . Hot electron transfer, which leads to acceleration of electron transfer between the interfaces, was also visualized as carrier concentration increases from 1.0 × 10 18 cm −3 –2.2 × 10 18 cm −3 .
Materialart:
Online-Ressource
ISSN:
1674-1056
DOI:
10.1088/1674-1056/abf4fa
Sprache:
Unbekannt
Verlag:
IOP Publishing
Publikationsdatum:
2021
ZDB Id:
2412147-2
