Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide We report for the first time dual-wavelength lasing at 78 K in a vertical cavity containing ultrasmooth MAPbCl 3 single crystals. To understand this unusual lasing behavior, the MAPbCl 3 single crystals were thoroughly investigated in terms of temperature-dependent optical experiments. Microreflectivity measurements reveal, besides the standard exciton feature at the ∼385 nm orthorhombic bandgap, an additional previously unreported excitonic peak at ∼412 nm. This second exciton feature aligns with the second lasing line, strongly suggesting the coexistence of a “second phase” within the primary orthorhombic lattice. We show that this second phase persists up to 300 K and is likely associated with the quantum dot-like nanostructures detected on the surface of the MAPbCl 3 crystals. The second phase depends on the growth method and crystal size but is likely traceable in all MAPbCl 3 systems. These insights offer enhanced understanding of the MAPbCl 3 system and open new pathways for blue-UV photonic devices.
Authors: Christina Siaitanidou, Violeta Spanou, Nikolaos G. Chatzarakis, Panagiotis Oikonomopoulos, Giannis S. Papaefstathiou, Katerina Tsagaraki, Eric Delamadeleine, Constantinos C. Stoumpos, Nikolaos T. Pelekanos
Institutions: University of Crete, FORTH Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, National and Kapodistrian University of Athens, Institut polytechnique de Grenoble, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Grenoble, Institut de Recherche Interdisciplinaire de Grenoble, St Petersburg University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W4416767362