State of the Art and Prospects for Halide Perovskite Nanocrystals

ACS Nano, Journal Year: 2021, Volume and Issue: 15(7), P. 10775 - 10981

Published: June 17, 2021

Metal-halide perovskites have rapidly emerged as one of the most promising materials 21st century, with many exciting properties and great potential for a broad range applications, from photovoltaics to optoelectronics photocatalysis. The ease which metal-halide can be synthesized in form brightly luminescent colloidal nanocrystals, well their tunable intriguing optical electronic properties, has attracted researchers different disciplines science technology. In last few years, there been significant progress shape-controlled synthesis perovskite nanocrystals understanding applications. this comprehensive review, having expertise fields (chemistry, physics, device engineering) joined together provide state art overview future prospects nanocrystal research.

Language: Английский

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Self-Trapped Excitons in All-Inorganic Halide Perovskites: Fundamentals, Status, and Potential Applications

The Journal of Physical Chemistry Letters, Journal Year: 2019, Volume and Issue: 10(8), P. 1999 - 2007

Published: April 4, 2019

Photoluminescence is a radiative recombination process of electron-hole pairs. Self-trapped excitons (STEs), occurring in material with soft lattice and strong electron-phonon coupling, emit photons broad spectrum large Stokes shift. Recently, series halide perovskites efficient STE emission have been reported showed promise for solid-state lighting. In this Perspective, we present an overview various photoluminescence phenomena the emphasis on mechanism characteristics derived from STEs. This followed by introduction hybrid perovskites. We then introduce all-inorganic emitters focus particular STEs double-perovskite Cs2AgInCl6 strategies efficiency improvement. Finally, summarize current electroluminescence applications as well potential luminescent solar concentrators provide future research opportunities.

Language: Английский

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Recent progress of zero-dimensional luminescent metal halides

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(4), P. 2626 - 2662

Published: Jan. 1, 2021

This review provides in-depth insight into the structure–luminescence–application relationship of 0D all-inorganic/organic–inorganic hybrid metal halide luminescent materials.

Language: Английский

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Disphenoidal Zero-Dimensional Lead, Tin, and Germanium Halides: Highly Emissive Singlet and Triplet Self-Trapped Excitons and X-ray Scintillation

Journal of the American Chemical Society, Journal Year: 2019, Volume and Issue: 141(25), P. 9764 - 9768

Published: June 17, 2019

Low-dimensional metal halides have been researched as optoelectronic materials for the past two decades. Zero-dimensional of ns2 elements (Sn, Pb, Sb) recently gained attention highly efficient broadband light emitters. These compounds comprise discrete halide centers, isolated by bulky organic cations. Herein, we report isostructural complexes Ge(II), Sn(II), and Pb(II) with a 1-butyl-1-methyl-piperidinium cation (Bmpip), featuring unusual disphenoidal coordination stereoactive lone pair. Spectrally broad, bright emission from localized excitons, quantum efficiencies up to 75%, is observed in blue red spectral regions bromides (for Sn, Ge, respectively) extends into near-infrared Bmpip2SnI4 (peak at 730 nm). In case Sn(II) both singlet triplet excitonic bands observed. Furthermore, Bmpip2SnBr4 Bmpip2PbBr4 exhibit X-ray-excited luminescence (radioluminescence) brightness being commensurate that commercial inorganic X-ray scintillator (NaI:Tl).

Language: Английский

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A Highly Red‐Emissive Lead‐Free Indium‐Based Perovskite Single Crystal for Sensitive Water Detection

Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 58(16), P. 5277 - 5281

Published: Feb. 21, 2019

Low-dimensional luminescent lead halide perovskites have attracted tremendous attention for their fascinating optoelectronic properties, while the toxicity of is still considered a drawback. Herein, we report novel lead-free zero-dimensional (0D) indium-based perovskite (Cs2 InBr5 ⋅H2 O) single crystal that red-luminescent with high photoluminescence quantum yield (PLQY) 33 %. Experimental and computational studies reveal strong PL emission might originate from self-trapping excitons (STEs) result an excited-state structural deformation. More importantly, in situ transformation between hydrated Cs2 O dehydrated form accompanied switchable dual emission, which enables it to act as water-sensor humidity detection or traces water organic solvents.

Language: Английский

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High-resolution remote thermometry and thermography using luminescent low-dimensional tin-halide perovskites

Nature Materials, Journal Year: 2019, Volume and Issue: 18(8), P. 846 - 852

Published: July 1, 2019

Language: Английский

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Highly Emissive Self‐Trapped Excitons in Fully Inorganic Zero‐Dimensional Tin Halides

Angewandte Chemie International Edition, Journal Year: 2018, Volume and Issue: 57(35), P. 11329 - 11333

Published: July 12, 2018

Abstract The spatial localization of charge carriers to promote the formation bound excitons and concomitantly enhance radiative recombination has long been a goal for luminescent semiconductors. Zero‐dimensional materials structurally impose carrier result in localized Frenkel excitons. Now fully inorganic, perovskite‐derived zero‐dimensional Sn II material Cs 4 SnBr 6 is presented that exhibits room‐temperature broad‐band photoluminescence centered at 540 nm with quantum yield (QY) 15±5 %. A series analogous compositions following general formula 4− x Sn(Br 1− y I ) (A=Rb, K; ≤1, ≤1) can be prepared. emission these ranges from 500 620 possibility compositionally tune Stokes shift self‐trapped exciton bands.

Language: Английский

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Bi³⁺‐Er³⁺ and Bi³⁺‐Yb³⁺ Codoped Cs₂AgInCl₆ Double Perovskite Near‐Infrared Emitters

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(28), P. 11307 - 11311

Published: March 13, 2020

Bi3+ and lanthanide ions have been codoped in metal oxides as optical sensitizers emitters. But such codoping is not known typical semiconductors Si, GaAs, CdSe. Metal halide perovskite with coordination number 6 provides an opportunity to codope ions. Codoping of Ln3+ (Ln=Er Yb) Cs2 AgInCl6 double presented. -Er3+ shows Er3+ f-electron emission at 1540 nm (suitable for low-loss communication). decreases the excitation (absorption) energy, that samples can be excited ca. 370 light. At excitation, 45 times higher intensity compared doped . Similar results are also observed -Yb3+ sample emitting 994 nm. A combination temperature-dependent (5.7 K 423 K) photoluminescence calculations used understand sensitization processes.

Language: Английский

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Efficient Lone-Pair-Driven Luminescence: Structure–Property Relationships in Emissive 5s² Metal Halides

ACS Materials Letters, Journal Year: 2020, Volume and Issue: 2(9), P. 1218 - 1232

Published: Aug. 4, 2020

Low-dimensional metal halides have been the focus of intense investigations in recent years following success hybrid lead halide perovskites as optoelectronic materials. In particular, light emission low-dimensional based on 5s2 cations Sn2+ and Sb3+ has found utility a variety applications complementary to those three-dimensional because its unusual properties such broadband character highly temperature-dependent lifetime. These derive from exceptional chemistry lone pair, but terminology explanations given for vary widely, hampering efforts build cohesive understanding these materials that would development efficient devices. this Perspective, we provide structural overview with dynamics driven by stereoactivity pair identify features enable strong emission. We unite different theoretical models able explain bright centers into framework, which is then applied array compounds recently developed our group other researchers, demonstrating generating holistic picture field point view chemist. highlight state-of-the-art demonstrate unique capabilities versatile emissive promising future directions halides.

Language: Английский

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All‐Inorganic CsCu₂I₃ Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(46)

Published: Oct. 3, 2019

Energy-saving white lighting from the efficient intrinsic emission of semiconductors is considered as a next-generation source. Currently, white-light can be composited with blue light-emitting diode and yellow phosphor. However, this solution has an inevitable light loss, which makes improvement energy utilization efficiency more difficult. To deal problem, (IWE) in single solid material gives possibility. Here, all-inorganic lead-free CsCu2 I3 perovskite crystal (SC) stable high photoluminescence quantum yield (≈15.7%) IWE through strongly localized 1D exciton recombination synthesized. In , Cu-I octahedron, provides most electron states, isolated by Cs atoms two directions to form electronic structure, resulting radiation rate excitons. With structure design, SCs have great potential energy-saving lighting.

Language: Английский

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