Projects per year
Abstract
Metal halides perovskites, such as hybrid organic-inorganic CH3NH3PbI3, are newcomer optoelectronic materials that have attracted enormous attention as solution-deposited absorbing layers in solar cells with power conversion efficiencies reaching 20%. Herein we demonstrate a new avenue for halide perovskties by designing perovskite-based quantum dot materials. We have synthesized monodisperse, colloidal nanocubes (4-15 nm edge lengths) of fully inorganic cesium lead halide perovskites (CsPbX3, X=Cl, Br, I or mixed halide systems Cl/Br and Br/I) using inexpensive commercial precursors. Through compositional modulations and quantum size-effects, the bandgap energies and emission spectra are readily tunable over the entire visible spectral region of 410-700 nm. The photoluminescence of CsPbX3 nanocrystals is characterized by narrow emission line-widths of 12-42 nm, wide color gamut covering up to 140% of the NTSC color standard, high quantum yields of up to 90% and radiative lifetimes in the range of 4-29 ns. The compelling combination of enhanced optical properties and chemical robustness makes CsPbX3 nanocrystals appealing for optoelectronic applications, particularly for blue and green spectral regions (410-530 nm), where typical metal chalcogenide-based quantum dots suffer from photodegradation.
Original language | English |
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Pages (from-to) | 3692–3696 |
Number of pages | 5 |
Journal | Nano Letters |
Volume | 15 |
Issue number | 6 |
Early online date | 29 Jan 2015 |
DOIs | |
Publication status | Published - 10 Jun 2015 |
Keywords
- Perovskites
- halides
- quantum dots
- nanocrystals
- optoelectronics
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Dive into the research topics of 'Nanocrystals of cesium lead halide perovskites (CsPbX3, X=Cl, Br, and I): novel optoelectronic materials showing bright emission with wide color gamut'. Together they form a unique fingerprint.Projects
- 1 Finished
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Multi-Scale Modelling of Hybrid Perovskites for Solar Cells
Walsh, A. (PI)
Engineering and Physical Sciences Research Council
1/02/15 → 31/01/18
Project: Research council
Equipment
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High Performance Computing (HPC) Facility
Chapman, S. (Manager)
University of BathFacility/equipment: Facility