Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut
Loredana Protesescu,Loredana Protesescu,Sergii Yakunin,Sergii Yakunin,Maryna I. Bodnarchuk,Maryna I. Bodnarchuk,Franziska Krieg,Franziska Krieg,Riccarda Caputo,Christopher H. Hendon,Ruo Xi Yang,Aron Walsh,Maksym V. Kovalenko,Maksym V. Kovalenko +13 more
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TLDR
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.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 perovskites by designing highly luminescent perovskite-based colloidal 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, and 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 radiativ...read more
Citations
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Photoinduced, reversible phase transitions in all-inorganic perovskite nanocrystals.
Matthew S. Kirschner,Benjamin T. Diroll,Peijun Guo,Samantha M. Harvey,Waleed Helweh,Nathan C. Flanders,Alexandra Brumberg,Nicolas E. Watkins,Ariel A. Leonard,Ariel A. Leonard,Austin M. Evans,Michael R. Wasielewski,William R. Dichtel,Xiaoyi Zhang,Lin X. Chen,Lin X. Chen,Richard D. Schaller,Richard D. Schaller +17 more
TL;DR: It is shown that cesium lead bromide nanocrystals experience a reversible orthorhombic-to-cubic phase transition at moderate excitation fluences and become amorphous at higher fluences, demonstrating that light-driven phase transitions occur in perovskite materials.
Journal ArticleDOI
Luminescence spectroscopy of lead-halide perovskites: materials properties and application as photovoltaic devices
TL;DR: In this article, the authors summarize recent optical spectroscopic studies on CH3NH3PbI3 and CH3 NH 3PbBr3 perovskite single crystals, thin films, and diode devices.
Journal ArticleDOI
Formation of highly luminescent cesium bismuth halide perovskite quantum dots tuned by anion exchange
TL;DR: Excellent thermal stability and good luminescence properties have been achieved as intrinsic features of the inorganic halide perovskites, as well as the effective passivation of surface trap-states.
Journal ArticleDOI
Alkyl Phosphonic Acids Deliver CsPbBr3 Nanocrystals with High Photoluminescence Quantum Yield and Truncated Octahedron Shape
Baowei Zhang,Baowei Zhang,Luca Goldoni,Juliette Zito,Zhiya Dang,Guilherme Almeida,Francesco Zaccaria,Jur de Wit,Ivan Infante,Luca De Trizio,Liberato Manna +10 more
TL;DR: In this paper, a colloidal approach for the synthesis of CsPbBr3 nanocrystals (NCs) was devised, in which the only ligands employed are alkyl phosphonic acids.
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