Researchers at the UJI and UV reveal an interaction between perovskite and quantum dots that could improve LED technology and solar cell efficiency



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## Researchers at the UJI and UV reveal an interaction between perovskite and quantum dots that could improve LED technology and solar cell efficiency

29/01/2016 |
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* [![ perovskita-quantics sciencie-advances-web](/com/noticies/2016/01/2q/perovskita-quantics/sciencie-advances-web.jpg)](#)

Six researchers from the Institute for Advanced Materials (INAM) of the Universitat Jaume I and the University of Valencia have been able to measure the exciplex, the result of the coupling of halide perovskite and colloidal s quantum dots. These two families of materials have separately enormous interest in the development of optoelectronic devices. The study was published on January 22 in *SciencieAdvances,* an open-access journal from the same publisher that the prestigious journal *Science.* In the research, directed by Ivan Mora Seró of the Institute for Advanced Materials of the UJI; and Juan Martínez Pastor of the University of Valencia, have participated as first authors Rafael Sanchez and Mauricio Solis (INAM) and have contributed Isaac Suárez and Guillermo Muñoz (UV).

The study has demonstrated that through coupling, the combined system can emit light at a longer wavelength than the wave each of the components could cast separately, a fact that would allow designing a wide range of new devices, which in addition to emitting light, could open the way for a new type of more efficient solar cells and obtain tunable LEDs by combining hybrid halide perovskite and quantum dots, scientists have found that a new state, other than the state of both materials used, happens giving birth to a shorter wavelength than that the one of the original materials and that at the same time can be controlled the colour of emission by the voltage applied. The immediate use would be for the obtaining LEDs with light controlled by the voltage on the non-visible spectrum (IR) with application, for example, in the field of telecommunications; but being two rather versatile materials, it would be possible to obtain light in the visible spectrum and even combining a LED with emission in the visible or infrared spectrum depending on the conditions applied.

This new line of research that incorporates quantum dots to perovskite can potentially lead to new processes in the field of optoelectronic applications. The researchers believe that "if you can combine the electrode of a material with vacuum of another one and emit a photon (which is what a LED makes), it would also be possible, theoretically, the opposite process, that is to absorb a long length wave photon to produce electricity, taking advantage of all wavelengths of sunlight that reaches the Earth", which would serve to achieve more efficient solar cells called intermediate band cells, with more capacity to absorb power.

Reference article: "Tunable light emission by exciplex state formation between hybrid halide perovskite and core/shell quantum dots: Implications in advanced LEDs and photovoltaics". On the web: <http://advances.sciencemag.org/content/2/1/e1501104>

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- [www.inam.uji.es](../Downloads/www.inam.uji.es)

- [www.uv.es/umdo](../Downloads/www.uv.es/umdo)

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