Journal Article

FZJ-2020-02461

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Photodriven Dipole Reordering: Key to Carrier Separation in Metalorganic Halide Perovskites

Hsu, H.-C. ; Huang, B.-C. ; Chin, S.-C. ; Hsing, C.-R. ; Nguyen, D.-L. ; Schnedler, M.FZJ* ; Sankar, R. ; Dunin-Borkowski, R. E.FZJ* ; Wei, C.-M. ; Chen, C.FZJ* ; Ebert, P.FZJ* ; Chiu, Y.-P. (Corresponding author)Extern*

2019
Soc. Washington, DC

This record in other databases:      

Please use a persistent id in citations: http://hdl.handle.net/2128/25726  doi:10.1021/acsnano.8b09645

Abstract: Photodriven dipole reordering of the intercalated organic molecules in halide perovskites has been suggested to be a critical degree of freedom, potentially affecting physical properties, device performance, and stability of hybrid perovskite-based optoelectronic devices. However, thus far a direct atomically resolved dipole mapping under device operation condition, that is, illumination, is lacking. Here, we map simultaneously the molecule dipole orientation pattern and the electrostatic potential with atomic resolution using photoexcited cross-sectional scanning tunneling microscopy and spectroscopy. Our experimental observations demonstrate that a photodriven molecule dipole reordering, initiated by a photoexcited separation of electron–hole pairs in spatially displaced orbitals, leads to a fundamental reshaping of the potential landscape in halide perovskites, creating separate one-dimensional transport channels for holes and electrons. We anticipate that analogous light-induced polarization order transitions occur in bulk and are at the origin of the extraordinary efficiencies of organometal halide perovskite-based solar cells as well as could reconcile apparently contradictory materials’ properties.

---

Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)
2. Mikrostrukturforschung (PGI-5)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)

Appears in the scientific report 2020

---

Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 10 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

---