State of the Art and Prospects for Halide Perovskite Nanocrystals

ACS Nano, Год журнала: 2021, Номер 15(7), С. 10775 - 10981

Опубликована: Июнь 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.

Язык: Английский

---

Quantum and Dielectric Confinement Effects in Lower-Dimensional Hybrid Perovskite Semiconductors

Chemical Reviews, Год журнала: 2019, Номер 119(5), С. 3140 - 3192

Опубликована: Янв. 14, 2019

Hybrid halide perovskites are now superstar materials leading the field of low-cost thin film photovoltaics technologies. Following surge for more efficient and stable 3D bulk alloys, multilayered colloidal perovskite nanostructures appeared in 2016 as viable alternative solutions to this challenge, largely exceeding original proof concept made 2009 2014, respectively. This triggered renewed interest lower-dimensional hybrid at same time increasingly numerous differentiated applications. The present paper is a review past literature on both compounds, emphasizing that availability accurate structural information dramatic importance reach fair understanding quantum dielectric confinement effects. Layered occupy special place history perovskites, with large number seminal papers 1980s 1990s. In recent years, rationalization structure-properties relationship has greatly benefited from new theoretical approaches dedicated their electronic structures optoelectronic properties, well growing contributions based modern experimental techniques. necessary step provide in-depth tools decipher extensive chemical engineering possibilities which surpass ones counterparts. Comparisons classical semiconductor 2D van der Waals heterostructures also stressed. Since 2015, have undergone quick development applications light emission. Although intensively studied last two years by various spectroscopy techniques, description effects properties still its infancy.

Язык: Английский

---

Lead‐Free Halide Rb₂CuBr₃ as Sensitive X‐Ray Scintillator

Advanced Materials, Год журнала: 2019, Номер 31(44)

Опубликована: Сен. 18, 2019

Abstract Scintillators are widely utilized for radiation detections in many fields, such as nondestructive inspection, medical imaging, and space exploration. Lead halide perovskite scintillators have recently received extensive research attention owing to their tunable emission wavelength, low detection limit, ease of fabrication. However, the light yields toward X‐ray irradiation lead toxicity these perovskites severely restricts practical application. A novel lead‐free is presented, namely Rb 2 CuBr 3 , a scintillator with exceptionally high yield. exhibits 1D crystal structure enjoys strong carrier confinement near‐unity photoluminescence quantum yield (98.6%) violet emission. The combined negligible self‐absorption from self‐trapped exciton absorption capability enables record ≈91056 photons per MeV among relative scintillators. Overall, provides nontoxicity, radioluminescence intensity, good stability, thus laying foundations potential application low‐dose radiography.

Язык: Английский

---

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

Angewandte Chemie International Edition, Год журнала: 2019, Номер 58(16), С. 5277 - 5281

Опубликована: Фев. 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.

Язык: Английский

---

0D Perovskites: Unique Properties, Synthesis, and Their Applications

Advanced Science, Год журнала: 2021, Номер 8(24)

Опубликована: Окт. 24, 2021

0D perovskites have gained much attention in recent years due to their fascinating properties derived from peculiar structure with isolated metal halide octahedra or clusters. However, the systematic discussion on crystal and electronic of further understand photophysical characteristics comprehensive overview for applications are still lacking. In this review, unique diverse comprehensively analyzed, including large bandgaps, high exciton binding energy, largely Stokes-shifted broadband emissions self-trapped excitons. Furthermore, photoluminescence regulation discussed. Then, various synthetic methods perovskite single crystals, nanocrystals, thin films summarized. Finally, emerging light-emitting diodes, solar cells, detectors, some others illustrated, outlook future research field is also provided.

Язык: Английский

---

Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges

The Journal of Physical Chemistry Letters, Год журнала: 2018, Номер 9(9), С. 2326 - 2337

Опубликована: Апрель 13, 2018

Over the past decade, lead halide perovskites (LHPs) have emerged as new promising materials in fields of photovoltaics and light emission due to their facile syntheses exciting optical properties. The enthusiasm generated by LHPs has inspired research perovskite-related materials, including so-called "zero-dimensional cesium halides", which will be focus this Perspective. structure these is formed disconnected octahedra that are stabilized ions. Their properties dominated transitions localized within individual octahedra, hence title "'zero-dimensional perovskites". Controversial results on physical recently been reported, true nature photoluminescence still unclear. In Perspective, we take a close look at both nanocrystals bulk crystals/thin films, discuss contrasting opinions properties, propose potential applications, provide an outlook future experiments.

Язык: Английский

---

Unraveling luminescence mechanisms in zero-dimensional halide perovskites

Journal of Materials Chemistry C, Год журнала: 2018, Номер 6(24), С. 6398 - 6405

Опубликована: Янв. 1, 2018

Zero-dimensional (0D) halides perovskites, in which anionic metal-halide octahedra (MX₆)⁴⁻ are separated by organic or inorganic countercations, have recently shown promise as excellent luminescent materials.

Язык: Английский

---

Detecting ionizing radiation using halide perovskite semiconductors processed through solution and alternative methods

Nature Photonics, Год журнала: 2021, Номер 16(1), С. 14 - 26

Опубликована: Дек. 23, 2021

Язык: Английский

---

White light emission in low-dimensional perovskites

Journal of Materials Chemistry C, Год журнала: 2019, Номер 7(17), С. 4956 - 4969

Опубликована: Янв. 1, 2019

Structural properties closely affect the photophysical processes underlying photoluminescence broadening and white-light emission in low-dimensional perovskites.

Язык: Английский

---

Photoluminescence Origin of Zero-Dimensional Cs₄PbBr₆ Perovskite

ACS Energy Letters, Год журнала: 2019, Номер 5(1), С. 87 - 99

Опубликована: Ноя. 22, 2019

Green-emitting zero-dimensional perovskite Cs4PbBr6, consisting of an array isolated [PbBr6]4– octahedra, has drawn a magnitude interest due to its peculiar yet robust photoluminescence properties. Given many advances in the past few years, true nature unusual green emission from wide-bandgap Cs4PbBr6 remains elusive. Although number reviews have been published on this subject, emerging evidence motivates us summarize rapid progress about debate, whereby critical comments were made either rationalize or question each point view. This Review summarizes latest findings PL origins covering both CsPbBr3 impurity and defect theories. Specifically, chemical defects, including Br vacancies, polybromide, self-trapped excitons, interstitial molecules, is discussed. The phase transformation between particularly stressed because it brought more cloud puzzle. Finally, we discuss potential application material envisioned several future directions that may clarify mechanism PL.

Язык: Английский

---