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Title: Low-temperature solution-processed wavelength-tunable perovskites for lasing
Authors: Xing, Guichuan
Mathews, Nripan
Lim, Swee Sien
Yantara, Natalia
Liu, Xinfeng
Sabba, Dharani
Grätzel, Michael
Mhaisalkar, Subodh
Sum, Tze Chien
Keywords: DRNTU::Engineering::Materials::Compositional materials science
Issue Date: 2014
Source: Xing, G., Mathews, N., Lim, S. S., Yantara, N., Liu, X., Sabba, D., et al. (2014). Low-Temperature Solution-Processed wavelength-Tunable perovskites for lasing. Nature Materials, in press.
Series/Report no.: Nature materials
Abstract: Low-temperature solution-processed materials that show optical gain and can be embedded into a wide range of cavity resonators are attractive for the realization of on-chip coherent light sources. Organic semiconductors and colloidal quantum dots are considered the main candidates for this application. However, stumbling blocks in organic lasing include intrinsic losses from bimolecular annihilation and the conflicting requirements of high charge carrier mobility and large stimulated emission; whereas challenges pertaining to Auger losses and charge transport in quantum dots still remain. Herein, we reveal that solution-processed organic–inorganic halide perovskites (CH3NH3PbX3 where X = Cl, Br, I), which demonstrated huge potential in photovoltaics, also have promising optical gain. Their ultra-stable amplified spontaneous emission at strikingly low thresholds stems from their large absorption coefficients, ultralow bulk defect densities and slow Auger recombination. Straightforward visible spectral tunability (390–790 nm) is demonstrated. Importantly, in view of their balanced ambipolar charge transport characteristics, these materials may show electrically driven lasing.
DOI: 10.1038/nmat3911
Rights: © 2014 Macmillan Publishers Limited. This is the author created version of a work that has been peer reviewed and accepted for publication in Nature Materials, published by Nature Publishing Group on behalf of Macmillan Publishers Limited It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
MSE Journal Articles
SPMS Journal Articles

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