Giant five-photon absorption from multidimensional core-shell halide perovskite colloidal nanocrystals

Weiqiang Chen, Saikat Bhaumik, Sjoerd A. Veldhuis, Guichuan Xing, Qiang Xu, Michael Grätzel, Subodh Mhaisalkar, Nripan Mathews () and Tze Chien Sum ()
Additional contact information
Weiqiang Chen: School of Physical and Mathematical Sciences, Nanyang Technological University (NTU)
Saikat Bhaumik: Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, X-Frontier Block
Sjoerd A. Veldhuis: Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, X-Frontier Block
Guichuan Xing: School of Physical and Mathematical Sciences, Nanyang Technological University (NTU)
Qiang Xu: School of Physical and Mathematical Sciences, Nanyang Technological University (NTU)
Michael Grätzel: Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, X-Frontier Block
Subodh Mhaisalkar: Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, X-Frontier Block
Nripan Mathews: Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, X-Frontier Block
Tze Chien Sum: School of Physical and Mathematical Sciences, Nanyang Technological University (NTU)

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Multiphoton absorption processes enable many technologically important applications, such as in vivo imaging, photodynamic therapy and optical limiting, and so on. Specifically, higher-order nonlinear absorption such as five-photon absorption offers significant advantages of greater spatial confinement, increased penetration depth, reduced autofluorescence, enhanced sensitivity and improved resolution over lower orders in bioimaging. Organic chromophores and conventional semiconductor nanocrystals are leaders in two-/three-photon absorption applications, but face considerable challenges from their small five-photon action cross-sections. Herein, we reveal that the family of halide perovskite colloidal nanocrystals transcend these constraints with highly efficient five-photon-excited upconversion fluorescence—unprecedented for semiconductor nanocrystals. Amazingly, their multidimensional type I (both conduction and valence band edges of core lie within bandgap of shell) core–shell (three-dimensional methylammonium lead bromide/two-dimensional octylammonium lead bromide) perovskite nanocrystals exhibit five-photon action cross-sections that are at least 9 orders larger than state-of-the-art specially designed organic molecules. Importantly, this family of halide perovskite nanocrystals may enable fresh approaches for next-generation multiphoton imaging applications.

Date: 2017
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/ncomms15198 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:8:y:2017:i:1:d:10.1038_ncomms15198

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

DOI: 10.1038/ncomms15198

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 ().