Publications

Detailed Information

Abnormal spatial heterogeneity governing the charge-carrier mechanism in efficient Ruddlesden-Popper perovskite solar cells

Cited 23 time in Web of Science Cited 23 time in Scopus
Authors

Xi, Jun; Byeon, Junseop; Kim, Unsoo; Bang, Kijoon; Han, Gi Rim; Kim, Ji-Young; Yoon, Jungjin; Dong, Hua; Wu, Zhaoxin; Divitini, Giorgio; Xi, Kai; Park, Jinwoo; Lee, Tae-Woo; Kim, Seong Keun; Choi, Mansoo; Lee, Jong Woo

Issue Date
2021-09
Publisher
Royal Society of Chemistry
Citation
Energy and Environmental Sciences, Vol.14 No.9, pp.4915-4925
Abstract
Layered Ruddlesden-Popper perovskite (RPP) photovoltaics have gained substantial attention owing to their excellent air stability. However, their photovoltaic performance is still limited by the unclear real-time charge-carrier mechanism of operating devices. Herein, we report the correlation between the charge-carrier mechanism and the spatially heterogeneous RPP bulks induced by distinct sublattice cations in the state-of-the-art antisolvent-driven RPP devices. In particular, abnormal heterogeneities ranging from the lateral long-range to local sub-grain scale and corresponding charge-carrier behaviours are visualized for triple-cation RPPs. We discovered that such heterogeneities with a unitary 2D/3D hybrid suppress lattice vibrations and reduce Frohlich interactions by about 2 times, significantly promoting charge-carrier dynamics. Consequently, optimized triple-cation RPP solar cells greatly outperform their mono-cation counterparts. Furthermore, this principle can be applicable irrespective of 2D layer thickness (n > 2) and substrate type. This work provides a rationale for leveraging a disordered structure to stimulate charge-carrier motion and suggests the design principle of low-dimensional perovskites.
ISSN
1754-5692
URI
https://hdl.handle.net/10371/179132
DOI
https://doi.org/10.1039/d1ee00984b
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Altmetrics

Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Share