Photophysical properties of wavelength-tunable methylammonium lead halide perovskite nanocrystals

Freppon, Daniel J.; Men, Long; Burkhow, Sadie J.; Petrich, Jacob W.; Vela, Javier; Smith, Emily A.

doi:10.1039/C6TC03886G

Photophysical properties of wavelength-tunable methylammonium lead halide perovskite nanocrystals

Journal Article · Fri Nov 25 00:00:00 EST 2016 · Journal of Materials Chemistry C

DOI:https://doi.org/10.1039/C6TC03886G· OSTI ID:1342920

Freppon, Daniel J. ^[1]; Men, Long ^[1]; Burkhow, Sadie J. ^[1]; Petrich, Jacob W. ^[1]; Vela, Javier ^[1]; Smith, Emily A. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Chemistry

Here we present the time-correlated luminescence of isolated nanocrystals of five methylammonium lead mixed-halide perovskite compositions (CH₃NH₃PbBr_3$$-$$xI_x) that were synthesized with varying iodide and bromide anion loading. All analyzed nanocrystals had a spherical morphology with diameters in the range of 2 to 32 nm. The luminescence maxima of CH₃NH₃PbBr_3$$-$$xI_x nanocrystals were tuned to wavelengths ranging between 498 and 740 nm by varying the halide loading. Both CH₃NH₃PbI₃ and CH₃NH₃PbBr₃ nanocrystals exhibited no luminescence intermittency for more than 90% of the 250 s analysis time, as defined by a luminescence intensity three standard deviations above the background. The mixed halide CH₃NH₃PbBr_0.75I_0.25, CH₃NH₃PbBr_0.50I_0.50, and CH₃NH₃PbBr_0.25I_0.75 nanocrystals exhibited luminescence intermittency in 18%, 4% and 26% of the nanocrystals, respectively. Irrespective of luminescence intermittency, luminescence intensities were classified for each nanocrystal as: (a) constant, (b) multimodal, (c) photobrightening, and (d) photobleaching. Finally, based on their photophysics, the CH₃NH₃PbBr_3$$-$$xI_x nanocrystals can be expected to be useful in a wide-range of applications where low and non-intermittent luminescence is desirable, for example as imaging probes and in films for energy conversion devices.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1342920

Report Number(s):: IS-J--9149

Journal Information:: Journal of Materials Chemistry C, Journal Name: Journal of Materials Chemistry C Journal Issue: 1 Vol. 5; ISSN JMCCCX; ISSN 2050-7526

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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