The uploaded data is the basis for all figures presented in the manuscript and the Supporting InformationThis research data supports “Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals” which has been published in “Journal of the American Chemical Soceity”.This work was supported by the EPSRC [grant numbers EP/261 M005143/1, EP/G060738/1 and EP/G037221/1], Royal Society, Winton Program for the Physics of Sustainability and Gates Cambridge Trust

Böhm, Marcus L.

Brady, Ryan

Credgington, Dan

Dutton, Siân E.

Friend, Richard H.

Glass, Hugh F. J.

Greenham, Neil C.

Jellicoe, Tom C.

Rao, Akshay

Richter, Johannes M.

Tabachnyk, Maxim

Metal halide perovskite crystal structures have emerged as a class of optoelectronic materials, which combine the ease of solution processability with excellent optical absorption and emission qualities. Restricting the physical dimensions of the perovskite crystallites to a few nanometers can also unlock spatial confinement effects, which allow large spectral tunability and high luminescence quantum yields at low excitation densities. However, the most promising perovskite structures rely on lead as a cationic species, thereby hindering commercial application. The replacement of lead with nontoxic alternatives such as tin has been demonstrated in bulk films, but not in spatially confined nanocrystals. Here, we synthesize CsSnX3 (X = Cl, Cl0.5Br0.5, Br, Br0.5I0.5, I) perovskite nanocrystals and provide evidence of their spectral tunability through both quantum confinement effects and control of the anionic composition. We show that luminescence from Sn-based perovskite nanocrystals occurs on pico- to nanosecond time scales via two spectrally distinct radiative decay processes, which we assign to band-to-band emission and radiative recombination at shallow intrinsic defect sites

Dutton, Siân E.

Böhm, Marcus L.

King's Research Portal

English

Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals

Metal
halide perovskite crystal structures have emerged as a class
of optoelectronic materials, which combine the ease of solution processability
with excellent optical absorption and emission qualities. Restricting
the physical dimensions of the perovskite crystallites to a few nanometers
can also unlock spatial confinement effects, which allow large spectral
tunability and high luminescence quantum yields at low excitation
densities. However, the most promising perovskite structures rely
on lead as a cationic species, thereby hindering commercial application.
The replacement of lead with nontoxic alternatives such as tin has
been demonstrated in bulk films, but not in spatially confined nanocrystals.
Here, we synthesize CsSnX3 (X = Cl, Cl0.5Br0.5, Br, Br0.5I0.5, I) perovskite nanocrystals
and provide evidence of their spectral tunability through both quantum
confinement effects and control of the anionic composition. We show
that luminescence from Sn-based perovskite nanocrystals occurs on
pico- to nanosecond time scales via two spectrally distinct radiative
decay processes, which we assign to band-to-band emission and radiative
recombination at shallow intrinsic defect sites

Tom C. Jellicoe (1234899)

Johannes M. Richter (2542132)

Hugh F.
J. Glass (2542135)

Maxim Tabachnyk (1234896)

Ryan Brady (2542129)

Siân E. Dutton (1329885)

Akshay Rao (1309029)

Richard H. Friend (1315881)

Dan Credgington (1261242)

Neil
C. Greenham (2542138)

Marcus L. Böhm (1234881)

FigShare

Synthesis
and Optical Properties of Lead-Free Cesium
Tin Halide Perovskite Nanocrystals

Metal halide perovskite crystal structures have emerged as a class of optoelectronic materials, which combine the ease of solution processability with excellent optical absorption and emission qualities. Restricting the physical dimensions of the perovskite crystallites to a few nanometers can also unlock spatial confinement effects, which allow large spectral tunability and high luminescence quantum yields at low excitation densities. However, the most promising perovskite structures rely on lead as a cationic species, thereby hindering commercial application. The replacement of lead with nontoxic alternatives such as tin has been demonstrated in bulk films, but not in spatially confined nanocrystals. Here, we synthesize CsSnX3 (X = Cl, Cl0.5Br0.5, Br, Br0.5I0.5, I) perovskite nanocrystals and provide evidence of their spectral tunability through both quantum confinement effects and control of the anionic composition. We show that luminescence from Sn-based perovskite nanocrystals occurs on pico- to nanosecond time scales via two spectrally distinct radiative decay processes, which we assign to band-to-band emission and radiative recombination at shallow intrinsic defect sites.This work was supported by the EPSRC (grant nos. EP/ M005143/1, EP/G060738/1, EP/G037221/1). J.M.R. and M.T. thank the Winton Program for Sustainability for financial support, and M.T. further acknowledges the Gates Cambridge Trust for funding. D.C. is a Royal Society Research Fellow.This is the final version of the article. It first appeared from the American Chemical Society via http://dx.doi.org/10.1021/jacs.5b1347

Jellicoe, Tom C

Richter, Johannes M

Glass, Hugh FJ

Dutton, Siân E

Friend, Richard H

Greenham, Neil C

Böhm, Marcus L

Apollo (Cambridge)

Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals.

Tom C. Jellicoe

Johannes M. Richter

Hugh F. J. Glass

Maxim Tabachnyk

Ryan Brady

Siân E. Dutton

Akshay Rao

Richard H. Friend

Dan Credgington

Neil C. Greenham

Marcus L. Böhm

Crossref

Journal of the American Chemical Society

https://kclpure.kcl.ac.uk/portal/files/124401403/Synthesis_and_Optical_Properties_JELICOE_.pdf