Förster Resonance Energy Transfer and Enhanced Emission in Cs4PbBr6 Nanocrystals Encapsulated in Silicon Nano-Sheets for Perovskite Light Emitting Diode Applications

Mondragon, Araceli Herrera; Rodriguez, Roberto Gonzalez; Hurley, Noah; Varghese, Sinto; Jiang, Yan; Squires, Brian; Cheng, Maoding; Davis, Brooke; Jiang, Qinglong; Mortazavi, Mansour; Kaul, Anupama B.; Coffer, Jeffery L.; Cui, Jingbiao; Lin, Yuankun

doi:10.3390/nano14191596

Förster Resonance Energy Transfer and Enhanced Emission in Cs₄PbBr₆ Nanocrystals Encapsulated in Silicon Nano-Sheets for Perovskite Light Emitting Diode Applications

Journal Article · Thu Oct 03 00:00:00 EDT 2024 · Nanomaterials

DOI:https://doi.org/10.3390/nano14191596· OSTI ID:2462826

Mondragon, Araceli Herrera ^[1]; ^[1]; Hurley, Noah ^[1]; Varghese, Sinto ^[1]; ^[1]; Squires, Brian ^[1]; Cheng, Maoding ^[2]; Davis, Brooke ^[2]; ^[2]; Mortazavi, Mansour ^[2]; ^[1]; ^[3]; Cui, Jingbiao ^[1]; ^[1]

University of North Texas, Denton, TX (United States)
University of Arkansas, Pine Bluff, AR (United States)
Texas Christian University, Fort Worth, TX (United States)

Encapsulating Cs₄PbBr₆ quantum dots in silicon nano-sheets not only stabilizes the halide perovskite, but also takes advantage of the nano-sheet for a compatible integration with the traditional silicon semiconductor. Here, we report the preparation of un-passivated Cs₄PbBr₆ ellipsoidal nanocrystals and pseudo-spherical quantum dots in silicon nano-sheets and their enhanced photoluminescence (PL). For a sample with low concentrations of quantum dots in silicon nano-sheets, the emission from Cs₄PbBr₆ pseudo-spherical quantum dots is quenched and is dominated with Pb²⁺ ion/silicene emission, which is very stable during the whole measurement period. For a high concentration of Cs₄PbBr₆ ellipsoidal nanocrystals in silicon nano-sheets, we have observed Förster resonance energy transfer with up to 87% efficiency through the oscillation of two PL peaks when UV excitation switches between on and off, using recorded video and PL lifetime measurements. In an area of a non-uniform sample containing both ellipsoidal nanocrystals and pseudo-spherical quantum dots, where Pb²⁺ ion/silicene emissions, broadband emissions from quantum dots, and bandgap edge emissions (515 nm) appear, the 515 nm peak intensity increases five times over 30 min of UV excitation, probably due to a photon recycling effect. This irradiated sample has been stable for one year of ambient storage. Cs₄PbBr₆ quantum dots encapsulated in silicon nano-sheets can lead to applications of halide perovskite light emitting diodes (PeLEDs) and integration with traditional semiconductor materials.

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Research Organization:: University of North Texas, Denton, TX (United States)

Sponsoring Organization:: U.S. National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0004114

OSTI ID:: 2462826

Alternate ID(s):: OSTI ID: 2479842

Journal Information:: Nanomaterials, Journal Name: Nanomaterials Journal Issue: 19 Vol. 14; ISSN 2079-4991

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Förster Resonance Energy Transfer and Enhanced Emission in Cs4PbBr6 Nanocrystals Encapsulated in Silicon Nano-Sheets for Perovskite Light Emitting Diode Applications

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Förster Resonance Energy Transfer and Enhanced Emission in Cs₄PbBr₆ Nanocrystals Encapsulated in Silicon Nano-Sheets for Perovskite Light Emitting Diode Applications