Proceedings of nanoGe Fall Meeting 2018 (NFM18)
DOI: https://doi.org/10.29363/nanoge.nfm.2018.223
Publication date: 6th July 2018
In the last years semiconductor organometallic halide (CH3NH3PbX3, X=Cl, Br, I) perovskites (MHP) have emerged as an outstanding material to develop a new generation of photonics and electronics devices [1]. MHPs present excellent conductivity, light detection and emission properties, which have been successfully exploited in the implementation of broad range of optoelectronic devices. Examples include solar cells with efficiencies higher than 22%, broad band photodetectors, efficient optical sources, or optical amplifiers with low thresholds. Nevertheless, in spite of this important progress, most of this works use a rigid substrate to fabricate the device, while the integration of MHPs in flexible substrate is still at its very beginning. These new kinds of substrates, however, represent an important trend in optoelectronics, not only due to their wide range of applications, but also to the possibility to implement wearable devices directly in contact with the skin or clothes. In this work, MHP materials are successfully incorporated on a nanocellulose (NC) substrate with the intention to to construct wearable devices with new functionalities based on the light emission/detection properties of MHPs. In particular, a bilayer Poly(methyl methacrylate) /MHP deposited on NC resulted in a suitable waveguide to demonstrate amplification of the spontaneous emission (ASE) with a threshold as low as 3-4 nJ [2-3]. Moreover, when a photodetector system is integrated within the waveguide, the device provides a photocurrent useful to monitor the light/ASE propagated/generated along the structure [4]. This approximation paves the road of new wearable systems with a broad range of applications.
[1] I. Suárez: Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites, Eur. Phys. J. Appl. Phys., vol. 75, 30001, 2016.
[2] T.T. Ngo, et al.: Enhancement of the Performance of Perovskite Solar Cells, LEDs, and Optical Amplifiers by Anti‐Solvent Additive Deposition," Adv. Mater., vol. 29, pp. 1604056, Dec. 2016
[3] I. Suárez et al.: Polymer/perovskite amplifying waveguides for active hybrid silicon photonics. Adv. Mater., vol. 27, 6157-6162, 2015.
[4] I. Suárez et al.: Integrated Optical Amplifier-Photodetector on a Wearable Nanocellulose Substrate. Adv. Opt. Matter., online available.
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