Hot carriers perspective on the nature of traps in perovskites

Marcello Righetto, Swee Sien Lim, David Giovanni, Jia Wei Melvin Lim, Qiannan Zhang, Sankaran Ramesh, Yong Kang Eugene Tay and Tze Chien Sum ()
Additional contact information
Marcello Righetto: Nanyang Technological University
Swee Sien Lim: Nanyang Technological University
David Giovanni: Nanyang Technological University
Jia Wei Melvin Lim: Nanyang Technological University
Qiannan Zhang: Nanyang Technological University
Sankaran Ramesh: Nanyang Technological University
Yong Kang Eugene Tay: Nanyang Technological University
Tze Chien Sum: Nanyang Technological University

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Amongst the many spectacular properties of hybrid lead halide perovskites, their defect tolerance is regarded as the key enabler for a spectrum of high-performance optoelectronic devices that propel perovskites to prominence. However, the plateauing efficiency enhancement of perovskite devices calls into question the extent of this defect tolerance in perovskite systems; an opportunity for perovskite nanocrystals to fill. Through optical spectroscopy and phenomenological modeling based on the Marcus theory of charge transfer, we uncover the detrimental effect of hot carriers trapping in methylammonium lead iodide and bromide nanocrystals. Higher excess energies induce faster carrier trapping rates, ascribed to interactions with shallow traps and ligands, turning these into potent defects. Passivating these traps with the introduction of phosphine oxide ligands can help mitigate hot carrier trapping. Importantly, our findings extend beyond photovoltaics and are relevant for low threshold lasers, light-emitting devices and multi-exciton generation devices.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/s41467-020-16463-7 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16463-7

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-020-16463-7

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().