DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Nanomaterials

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.

Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0004114
OSTI ID:
2462826
Journal Information:
Nanomaterials, Journal Name: Nanomaterials Journal Issue: 19 Vol. 14; ISSN 2079-4991; ISSN NANOKO
Publisher:
MDPI AGCopyright Statement
Country of Publication:
Switzerland
Language:
English

References (34)

Unravelling Light-Induced Degradation of Layered Perovskite Crystals and Design of Efficient Encapsulation for Improved Photostability journal April 2018
Zero‐Dimensional Perovskite Nanocrystals for Efficient Luminescent Solar Concentrators journal May 2019
Confinement of Perovskite‐QDs within a Single MOF Crystal for Significantly Enhanced Multiphoton Excited Luminescence journal December 2018
Brightened Bicomponent Perovskite Nanocomposite Based on Förster Resonance Energy Transfer for Micro‐LED Displays journal June 2023
Manipulation of Charge Dynamics for Efficient and Bright Blue Perovskite Light‐Emitting Diodes with Chiral Ligands journal July 2023
Highly Emissive Blue Quantum Dots with Superior Thermal Stability via In Situ Surface Reconstruction of Mixed CsPbBr3–Cs4PbBr6 Nanocrystals journal December 2021
Förster Resonance Energy Transfer in Luminescent Solar Concentrators journal June 2022
Highly Emissive Self-Trapped Excitons in Fully Inorganic Zero-Dimensional Tin Halides journal July 2018
Remarkable Black‐Phase Robustness of CsPbI3 Nanocrystals Sealed in Solid SiO2/AlOx Sub‐Micron Particles journal October 2021
Direct Observation on p- to n-Type Transformation of Perovskite Surface Region during Defect Passivation Driving High Photovoltaic Efficiency journal February 2021
Förster Resonance Energy Transfer Assisted Enhancement in Optoelectronic Properties of Metal Halide Perovskite Nanocrystals journal May 2022
The Benefit and Challenges of Zero-Dimensional Perovskites journal June 2018
Degradation and Self-Healing in Perovskite Solar Cells journal May 2022
Encapsulation of Perovskite Nanocrystals into Macroscale Polymer Matrices: Enhanced Stability and Polarization journal December 2016
Silicene/Silicene Oxide Nanosheets for Broadband Photodetectors journal March 2022
Two-Dimensional Quantum-Confined CsPbBr3 in Silicene for LED Applications journal February 2023
Pure Cs 4 PbBr 6 : Highly Luminescent Zero-Dimensional Perovskite Solids journal September 2016
Intrinsic Lead Ion Emissions in Zero-Dimensional Cs 4 PbBr 6 Nanocrystals journal November 2017
Distance Dependence of Förster Resonance Energy Transfer Rates in 2D Perovskite Quantum Wells via Control of Organic Spacer Length journal March 2021
Maximizing and stabilizing luminescence from halide perovskites with potassium passivation journal March 2018
Photonic effects on the Förster resonance energy transfer efficiency journal April 2014
Low-temperature solution-processed wavelength-tunable perovskites for lasing journal March 2014
Lead-halide Cs4PbBr6 single crystals for high-sensitivity radiation detection journal April 2021
Blue light-emitting diodes based on colloidal quantum dots with reduced surface-bulk coupling journal January 2023
Tunability Limit of Photoluminescence in Colloidal Silicon Nanocrystals journal July 2015
Advanced composite glasses with metallic, perovskite, and two-dimensional nanocrystals for optoelectronic and photonic applications journal January 2022
Encapsulated MAPbBr3 in nickel oxide nanotubes and their electroluminescence journal January 2022
Perovskite grain wrapping by converting interfaces and grain boundaries into robust and water-insoluble low-dimensional perovskites journal December 2022
High-efficiency solution-processed perovskite solar cells with millimeter-scale grains journal January 2015
Efficient and stable solution-processed planar perovskite solar cells via contact passivation journal February 2017
Stabilizing perovskite-substrate interfaces for high-performance perovskite modules journal August 2021
Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells journal July 2023
High-efficiency energy transfer in perovskite heterostructures journal January 2018
Pump-power-dependence of a CsPbBr 3 -in-Cs 4 PbBr 6 quantum dot color converter journal January 2019