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Issue 16, 2016
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Tunable perovskite microdisk lasers

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Perovskite microdisk lasers have been intensively studied recently. But their lasing properties are usually fixed once the devices are synthesized. Here, for the first time, we demonstrated the switchable and tunable perovskite microdisk lasers by surrounding them with 5CB liquid crystals. With the increase of the environmental temperature from 24 °C to 34 °C, the lasing wavelength slightly changed from 552.91 nm to 552.11 nm at the beginning and suddenly shifted to around 552.54 nm at T = 32 °C, where the phase transition of liquid crystals occurs. Our numerical calculation shows that the wavelength shift is caused by the changes of the refractive index of liquid crystals. More than tuning of the wavelength, a more dramatic wavelength transition from ∼554 nm to 550 nm has also been observed. This sudden transition is mainly induced by the reduction of scattering rather than the change in the refractive index when the liquid crystals are changed from the nematic phase to the isotropic phase. We believe that our research can shed light on the applications of perovskite optoelectronics.

Graphical abstract: Tunable perovskite microdisk lasers

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Publication details

The article was received on 18 Jan 2016, accepted on 07 Mar 2016 and first published on 08 Mar 2016

Article type: Paper
DOI: 10.1039/C6NR00436A
Citation: Nanoscale, 2016,8, 8717-8721

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    Tunable perovskite microdisk lasers

    W. Sun, K. Wang, Z. Gu, S. Xiao and Q. Song, Nanoscale, 2016, 8, 8717
    DOI: 10.1039/C6NR00436A

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