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Peer-reviewedCC BYJournal of the American Chemical Society

Structural Rigidity Enables Amplified Spontaneous Emission in 2D Alkylammonium Tin Perovskites.

  • Francesca Canestra1
  • Nurgul Sarsembek1
  • Yarong He2,3
  • Andrea Pianetti2
  • Martina Santarelli1
  • Silvia Contessi4
  • Ranita Samanta1
  • Martina Zangari1
  • Federico Brivio5
  • Tommaso Salzillo1
  • Cristina Femoni1
  • Annamaria Petrozza2
1 more authors
  • Daniele Cortecchia1
5 affiliations
  1. 1Department of Industrial Chemistry "Toso Montanari", University of Bologna, 40129Bologna, Italy.
  2. 2Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia , via Rubattino 81, Milano20134, Italy.
  3. 3Department of Physics, Politecnico di Milano, Milano20133, Italy.
  4. 4Department of Medical and Surgical Sciences DIMEC, University of Bologna, 40138Bologna, Italy.
  5. 5Department of Physics and Astronomy "Galileo Galilei", University of Padova, Via Francesco Marzolo 8, 35131Padova, Italy.
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Abstract

Two-dimensional tin perovskites are attracting increasing attention for coherent light emission, yet the impact of organic cations on their properties remains poorly understood. Here, we compare the Ruddlesden-Popper (RP) butylammonium tin iodide (BA2SnI4) and Dion-Jacobson (DJ) 1,4-diammoniobutane tin iodide (DABSnI4) perovskites to investigate the impact of the two structural types on their photophysical and optical gain properties. Combining X-ray diffraction and solid-state NMR spectroscopy, we reveal the different templating properties of the mono- and ditopic cations on the long-range structural order and local coordination environment, identifying an unreported phase transition for DABSnI4. The constrained molecular motions in the DJ perovskite provide an increased structural rigidity that also suppresses vibrational modes of the inorganic sublattice. The consequent lower exciton-phonon coupling and exciton binding energy, reduced defectivity, and modulation of the exciton recombination dynamics create favorable conditions to stabilize the population inversion and achieve amplified spontaneous emission (ASE) in DABSnI4, in net contrast with BA2SnI4 where ASE could not be obtained. This work highlights that Dion-Jacobson perovskites can create more rigid structural environments with positive feedback on the photophysical properties, providing a simple but effective design strategy for the synthesis of improved materials for optoelectronic applications.

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Cite

BibTeXRIS
BibTeX
@article{canestra2026structural,
  title = {{Structural Rigidity Enables Amplified Spontaneous Emission in 2D Alkylammonium Tin Perovskites.}},
  author = {Francesca Canestra and Nurgul Sarsembek and Yarong He and Andrea Pianetti and Martina Santarelli and Silvia Contessi and Ranita Samanta and Martina Zangari and Federico Brivio and Tommaso Salzillo and Cristina Femoni and Annamaria Petrozza and Daniele Cortecchia},
  journal = {Journal of the American Chemical Society},
  year = {2026},
  month = oct,
  doi = {10.1021/jacs.6c14883},
  url = {https://europepmc.org/article/MED/42912367},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Structural Rigidity Enables Amplified Spontaneous Emission in 2D Alkylammonium Tin Perovskites.
AU  - Francesca Canestra
AU  - Nurgul Sarsembek
AU  - Yarong He
AU  - Andrea Pianetti
AU  - Martina Santarelli
AU  - Silvia Contessi
AU  - Ranita Samanta
AU  - Martina Zangari
AU  - Federico Brivio
AU  - Tommaso Salzillo
AU  - Cristina Femoni
AU  - Annamaria Petrozza
AU  - Daniele Cortecchia
PY  - 2026
DA  - 2026/10/01
JO  - Journal of the American Chemical Society
DO  - 10.1021/jacs.6c14883
UR  - https://europepmc.org/article/MED/42912367
AB  - Two-dimensional tin perovskites are attracting increasing attention for coherent light emission, yet the impact of organic cations on their properties remains poorly understood. Here, we compare the Ruddlesden-Popper (RP) butylammonium tin iodide (BA2SnI4) and Dion-Jacobson (DJ) 1,4-diammoniobutane tin iodide (DABSnI4) perovskites to investigate the impact of the two structural types on their photophysical and optical gain properties. Combining X-ray diffraction and solid-state NMR spectroscopy, we reveal the different templating properties of the mono- and ditopic cations on the long-range structural order and local coordination environment, identifying an unreported phase transition for DABSnI4. The constrained molecular motions in the DJ perovskite provide an increased structural rigidity that also suppresses vibrational modes of the inorganic sublattice. The consequent lower exciton-phonon coupling and exciton binding energy, reduced defectivity, and modulation of the exciton recombination dynamics create favorable conditions to stabilize the population inversion and achieve amplified spontaneous emission (ASE) in DABSnI4, in net contrast with BA2SnI4 where ASE could not be obtained. This work highlights that Dion-Jacobson perovskites can create more rigid structural environments with positive feedback on the photophysical properties, providing a simple but effective design strategy for the synthesis of improved materials for optoelectronic applications.
SN  - 0002-7863
SN  - 1520-5126
ER  -