TY - JOUR

T1 - Dual-Wavelength Lasing Due to Second Phase Inclusions in MAPbCl3

T2 - The Journal of Physical Chemistry C

AU - Siaitanidou, Christina

AU - Spanou, Violeta

AU - Chatzarakis, Nikolaos G.

AU - Oikonomopoulos, Panagiotis

AU - Papaefstathiou, Giannis S.

AU - Tsagaraki, Katerina

AU - Delamadeleine, Eric

AU - Stoumpos, Constantinos C.

AU - Pelekanos, Nikolaos T.

N1 - © 2025 The Authors. Published by American Chemical Society.

PY - 2025/11/27

Y1 - 2025/11/27

N2 - We report for the first time dual-wavelength lasingat 78 K in a vertical cavity containing ultrasmooth MAPbCl3 singlecrystals. To understand this unusual lasing behavior, the MAPbCl3single crystals were thoroughly investigated in terms of temperature-dependent optical experiments. Microreflectivity measurementsreveal, besides the standard exciton feature at the ∼385 nmorthorhombic bandgap, an additional previously unreportedexcitonic peak at ∼412 nm. This second exciton feature alignswith the second lasing line, strongly suggesting the coexistence of a“second phase” within the primary orthorhombic lattice. We showthat this second phase persists up to 300 K and is likely associatedwith the quantum dot-like nanostructures detected on the surfaceof the MAPbCl3 crystals. The second phase depends on the growth method and crystal size but is likely traceable in all MAPbCl3systems. These insights offer enhanced understanding of the MAPbCl3 system and open new pathways for blue-UV photonic

AB - We report for the first time dual-wavelength lasingat 78 K in a vertical cavity containing ultrasmooth MAPbCl3 singlecrystals. To understand this unusual lasing behavior, the MAPbCl3single crystals were thoroughly investigated in terms of temperature-dependent optical experiments. Microreflectivity measurementsreveal, besides the standard exciton feature at the ∼385 nmorthorhombic bandgap, an additional previously unreportedexcitonic peak at ∼412 nm. This second exciton feature alignswith the second lasing line, strongly suggesting the coexistence of a“second phase” within the primary orthorhombic lattice. We showthat this second phase persists up to 300 K and is likely associatedwith the quantum dot-like nanostructures detected on the surfaceof the MAPbCl3 crystals. The second phase depends on the growth method and crystal size but is likely traceable in all MAPbCl3systems. These insights offer enhanced understanding of the MAPbCl3 system and open new pathways for blue-UV photonic

UR - https://www.mendeley.com/catalogue/fdf93f78-b2b0-3d38-b591-e05b210cf9de/

U2 - 10.1021/acs.jpcc.5c05466

DO - 10.1021/acs.jpcc.5c05466

M3 - Article

C2 - 41341882

VL - 129

SP - 21016

EP - 21023

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 47

ER -