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Vertical Cavity Biexciton Lasing in 2D Dodecylammonium Lead Iodide Perovskites
Author(s) -
Booker Edward P.,
Price Michael B.,
Budden Peter J.,
Abolins Haralds,
del ValleInclan Redondo Yago,
Eyre Lissa,
Nasrallah Iyad,
Phillips Richard T.,
Friend Richard H.,
Deschler Felix,
Greenham Neil C.
Publication year - 2018
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201800616
Subject(s) - lasing threshold , biexciton , materials science , binding energy , exciton , perovskite (structure) , photoluminescence , halide , excitation , condensed matter physics , optoelectronics , molecular physics , atomic physics , crystallography , physics , chemistry , inorganic chemistry , wavelength , quantum mechanics
Layered Ruddlesden‐Popper‐type (2D) metal‐halide perovskites exhibit markedly increased exciton binding energies, exceeding 150 meV, compared to their 3D counterparts. Many‐body physics, enabled by Coulomb interactions, plays a strong role and raises the biexciton binding energy to 50 meV. Here, photoluminescence at a range of temperatures and carrier concentrations in thin films of the layered perovskite material (C 12 H 25 NH 3 ) 2 PbI 4 is reported. Biexcitons are directly observed up to a sample temperature of 225 K. An optical microcavity (comprising a distributed Bragg reflector and a metal mirror), with photonic resonances tuned near to the biexciton energy, is constructed. Optically‐pumped biexciton lasing up to 125 K, with a threshold peak excitation density of 5.6 × 10 18 cm −3 , is observed. The demonstration of biexciton lasing above liquid nitrogen temperatures is a crucial step for the application of layered perovskites in photonic applications.