Open AccessThe recombination mechanisms leading to amplified spontaneous emission at the true-green wavelength in CH3NH3PbBr3 perovskites
Author(s) -
Davide Priante,
İbrahim Dursun,
Mohd Sharizal Alias,
Dong Shi,
V.A. Melnikov,
Tien Khee Ng,
Omar F. Mohammed,
Osman M. Bakr,
Boon S. Ooi
Publication year - 2015
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.4913463
Subject(s) - photoluminescence , spontaneous emission , wavelength , recombination , perovskite (structure) , excitation , radiative transfer , materials science , exciton , optoelectronics , spectral line , atomic physics , molecular physics , condensed matter physics , chemistry , optics , physics , laser , crystallography , biochemistry , quantum mechanics , astronomy , gene
We investigated the mechanisms of radiative recombination in a CH3NH3PbBr3 hybrid perovskite material using low-temperature, power-dependent (77K), and temperature-dependent photoluminescence (PL) measurements. Two bound-excitonic radiative transitions related to grain size inhomogeneity were identified. Both transitions led to PL spectra broadening as a result of concurrent blue and red shifts of these excitonic peaks. The red-shifted bound-excitonic peak dominated at high PL excitation led to a true-green wavelength of 553nm for CH3NH3PbBr3 powders that are encapsulated in polydimethylsiloxane. Amplified spontaneous emission was eventually achieved for an excitation threshold energy of approximately 350μJ/cm2. Our results provide a platform for potential extension towards a true-green light-emitting device for solid-state lighting and display applications
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom