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Confining metal-halide perovskites in nanoporous thin films
Johannes Kepler University of Linz, Austria; Johannes Kepler University of Linz, Austria; LIT, Austria.
Ludwig Maximilians University of Munchen, Germany; Ludwig Maximilians University of Munchen, Germany.
Johannes Kepler University of Linz, Austria; Johannes Kepler University of Linz, Austria.
Johannes Kepler University of Linz, Austria.
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2017 (English)In: Science Advances, ISSN 0036-8156, E-ISSN 2375-2548, Vol. 3, no 8, article id e1700738Article in journal (Refereed) Published
Abstract [en]

Controlling the size and shape of semiconducting nanocrystals advances nanoelectronics and photonics. Quantumconfined, inexpensive, solution-derived metal halide perovskites offer narrowband, color-pure emitters as integral parts of next-generation displays and optoelectronic devices. We use nanoporous silicon and alumina thin films as templates for the growth of perovskite nanocrystallites directly within device-relevant architectures without the use of colloidal stabilization. We find significantly blue-shifted photoluminescence emission by reducing the pore size; normally infrared-emitting materials become visibly red, and green-emitting materials become cyan and blue. Confining perovskite nanocrystals within porous oxide thin films drastically increases photoluminescence stability because the templates auspiciously serve as encapsulation. We quantify the template-induced size of the perovskite crystals in nanoporous silicon with microfocus high-energy x-ray depth profiling in transmission geometry, verifying the growth of perovskite nanocrystals throughout the entire thickness of the nanoporous films. Low-voltage electroluminescent diodes with narrow, blue-shifted emission fabricated from nanocrystalline perovskites grown in embedded nanoporous alumina thin films substantiate our general concept for next-generation photonic devices.

Place, publisher, year, edition, pages
AMER ASSOC ADVANCEMENT SCIENCE , 2017. Vol. 3, no 8, article id e1700738
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Textile, Rubber and Polymeric Materials
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URN: urn:nbn:se:liu:diva-142189DOI: 10.1126/sciadv.1700738ISI: 000411589900009PubMedID: 28798959OAI: oai:DiVA.org:liu-142189DiVA, id: diva2:1151517
Note

Funding Agencies|European Research Council (ERC); Deutsche Forschungsgemeinschaft (DFG); UCL Mathematical and Physical Sciences faculty; COST Action [MP1305]

Available from: 2017-10-23 Created: 2017-10-23 Last updated: 2018-10-05

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