Tunable Emission from Quasi-2D Perovskites via Electrospinning
6 affiliations
- 1Chemistry, New York University, 100 Washington Square East, New York, NY, United States, 10003-6688
- 2Laboratory for Energy Materials, École Polytechnique Fédérale de Lausanne, Sion 1951, Switzerland
- 3Chemical and Biomolecular Engineering
- 4New York University
- 5Chemical Engineering and Materials Science
- 6Stevens Institute of Technology
Abstract
Quasi-2D Ruddlesden-Popper halide perovskites are promising materials for light-emitting applications. They comprise corner-sharing metal-halide octahedra separated by bulky, insulating organic spacers and exhibit tunable bandgaps by varying the number of octahedral layers, n . Isolating a single n -phase within a film remains challenging, with spin-coated films generally containing a broad distribution of n phases. Their emission is dominated by the largest n -number present due to energy funneling towards narrow bandgap phases. Here, we electrospin phenylethylammonium (PEA + )/methylammonium (MA + ) lead bromide quasi-2D perovskites into 140 - 400 nm nanofibers to restrict molecular diffusion. We observe progressive redshifts in absorption and photoluminescence from blue (410 nm) to cyan (470 nm) to green (530 nm) with decreasing PEA + :MA + molar ratio. In contrast, spin-coated films with the same PEA + :MA + ratios exhibit green emission (524 - 532 nm) across all MA + containing compositions. Transient absorption spectroscopy reveals energy transfer within 80 ps from low n phases to MAPbBr 3 domains in spin-coated films, which are absent in electrospun fibers. Electrospun fibers are also highly emissive compared to spin-coated films, with average photoluminescence quantum yields up to 77±1%. These results suggest that electrospinning limits organic cation diffusion to selectively stabilize intermediate n phases, providing a scalable route to achieve tunable solid-state emission.
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BibTeX
@misc{wijoyo2026tunable,
title = {{Tunable Emission from Quasi-2D Perovskites via Electrospinning}},
author = {Arnold Wijoyo and Huygen J. Jöbsis and Hongki Kim and Pulkita Jain and Emory Gaddis and Jiahui Althena Zhu and Mia Klopfenstein and Tsengming Chou and Eray S. Aydil and Sascha Feldmann and Stephanie S. Lee},
howpublished = {ChemRxiv},
year = {2026},
month = oct,
doi = {10.26434/chemrxiv.15010839/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010839/v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Tunable Emission from Quasi-2D Perovskites via Electrospinning
AU - Arnold Wijoyo
AU - Huygen J. Jöbsis
AU - Hongki Kim
AU - Pulkita Jain
AU - Emory Gaddis
AU - Jiahui Althena Zhu
AU - Mia Klopfenstein
AU - Tsengming Chou
AU - Eray S. Aydil
AU - Sascha Feldmann
AU - Stephanie S. Lee
PY - 2026
DA - 2026/10/22
PB - ChemRxiv
DO - 10.26434/chemrxiv.15010839/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010839/v1
AB - Quasi-2D Ruddlesden-Popper halide perovskites are promising materials for light-emitting applications. They comprise corner-sharing metal-halide octahedra separated by bulky, insulating organic spacers and exhibit tunable bandgaps by varying the number of octahedral layers, n . Isolating a single n -phase within a film remains challenging, with spin-coated films generally containing a broad distribution of n phases. Their emission is dominated by the largest n -number present due to energy funneling towards narrow bandgap phases. Here, we electrospin phenylethylammonium (PEA + )/methylammonium (MA + ) lead bromide quasi-2D perovskites into 140 - 400 nm nanofibers to restrict molecular diffusion. We observe progressive redshifts in absorption and photoluminescence from blue (410 nm) to cyan (470 nm) to green (530 nm) with decreasing PEA + :MA + molar ratio. In contrast, spin-coated films with the same PEA + :MA + ratios exhibit green emission (524 - 532 nm) across all MA + containing compositions. Transient absorption spectroscopy reveals energy transfer within 80 ps from low n phases to MAPbBr 3 domains in spin-coated films, which are absent in electrospun fibers. Electrospun fibers are also highly emissive compared to spin-coated films, with average photoluminescence quantum yields up to 77±1%. These results suggest that electrospinning limits organic cation diffusion to selectively stabilize intermediate n phases, providing a scalable route to achieve tunable solid-state emission.
ER -