Semiconductor nanocrystals‐based triplet‐triplet annihilation photon‐upconversion: Mechanism, materials and applications DOI Creative Commons

Kezhou Chen,

Qingxin Luan, Tiegen Liu

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

Abstract Triplet‐triplet annihilation photon upconversion (TTA‐UC) has emerged as a promising strategy for enhancing solar energy harvesting efficiency by converting two low‐energy, long‐wavelength photons into high‐energy, short‐wavelength photon. In recent years, semiconductor nanocrystals have gained significant attention efficient photosensitizers TTA‐UC due to their excellent triplet transfer and the ability tune bandgap across spectrum. This review focuses on mechanism of NC‐based TTA‐UC, emphasizing key parameters evaluate performance systems. The influence various material‐related factors overall is thoroughly discussed. Moreover, advances in solid‐state approaches are highlighted, along with an overview current status applications this field. Lastly, identifies challenges opportunities that lie ahead future development providing insights potential advancements directions further research.

Language: Английский

Efficient Ultraviolet Circularly Polarized Luminescence in Zero‐Dimensional Hybrid Cerium Bromides DOI
Chen Li, Yi Wei, Yan Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(26)

Published: April 18, 2024

Ultraviolet circularly polarized luminescence (UV-CPL) with high photon energy shows great potential in light sources and stereoselective photopolymerization. However, developing luminescent materials UV-CPL performance remains challenging. Here, we report a pair of rare earth Ce

Language: Английский

Citations

8
Amine-Free CsPbBr3 Perovskite Nanoplatelets Produced with Monolayer-Precision Thickness Control DOI
Ye Wu, Yang Liu,

Nadesh Fiuza‐Maneiro

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(6), P. 2425 - 2433

Published: May 20, 2024

Ultrathin lead halide perovskite nanoplatelets (NPLs) can enable tunable emission across the entire visible spectrum of light. The band-gap tunability NPLs does not require composition engineering, so segregation be avoided. However, their photoluminescence quantum yield (PLQY) and optoelectronic applications are often hampered due to reversible protonation deprotonation conventional amine ligands. Herein, we demonstrate synthesis benzenesulfonate-terminated CsPbBr3 without use any amine, clarify nucleation growth mechanism. thickness amine-free is controlled with monolayer-level precision, thus, wavelength tuned between 437 504 nm. Amine-free solely terminated by a benzenesulfonate group, leading Cs-rich surface. exhibit PLQYs up 80%, slow charge carrier relaxation. This work offers comprehensive study surface chemistry ligand dynamics NPLs.

Language: Английский

Citations

7
Strategies for Stabilizing Metal Halide Perovskite Light-Emitting Diodes: Bulk and Surface Reconstruction of Perovskite Nanocrystals DOI
Ye Wu, Desui Chen, Guangruixing Zou

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Light-emitting colloidal lead halide perovskite nanocrystals (PeNCs) are considered promising candidates for next-generation vivid displays. However, the operational stability of light-emitting diodes (LEDs) based on PeNCs is still lower than those polycrystalline films, which requires an understanding defect formation in PeNCs, both inside crystal lattice ("bulk") and at surface. Meanwhile, uncontrollable ion redistribution electrochemical reactions under LED operation can be severe, also related to bulk surface quality a well-designed device architecture boost carrier injection balance radiative recombination. In this review, we consider reconstruction by enhancing rigidity rationally selecting ligands. Degradation pathways applied voltage discussed, strategies avoid undesirable migration PeNC films. Subsequently, other critical issues hindering commercial application LEDs including toxicity Pb perovskites, scale-up deposition design active-matrix prototypes high-resolution modules.

Language: Английский

Citations

1
Ultraviolet Circularly Polarized Luminescence: Progress in Chiral Materials and Emerging Applications DOI
Chen Li, Yi Wei, Zewei Quan

et al.

Journal of Luminescence, Journal Year: 2025, Volume and Issue: 280, P. 121127 - 121127

Published: Feb. 11, 2025

Language: Английский

Citations

0
Strong Upconverted Circularly Polarized Emission from a Chiral Tetrahedral Yb/Eu Cage DOI
Zhiwei Yao, Ting Gao, Peng‐Fei Yan

et al.

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The heteropolynuclear chiral tetrahedral cages (Yb/Eu) 4 L ( R / S -BINAPO) exhibit upconverted circularly polarized luminescence (UC-CPL) via a novel Yb** → T 1 Eu* upconversion mechanism.

Language: Английский

Citations

0
Helical Perovskite Nanowires with Strong Circularly Polarized Luminescence Self-Assembled from Red-Emitting CsPbI3 Quantum Dots Following Chiral Ligand Exchange DOI
Haochen Liu,

Arsenii S. Portniagin,

Bing Tang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Circularly polarized luminescence (CPL) of chiral perovskite nanocrystals is crucial for applications such as spin-polarized light-emitting diodes and photodetectors. However, the reported dissymmetry factors are often too low practical applications; it also important CPL wavelengths to cover red emission range display applications. Herein, we realized helical nanowires self-assembled from red-emitting CsPbI3 quantum dots (QDs) with a strong signal around 640 nm, which was enabled by ligand R-/S-binaphthyl phosphoric acid. The formation QDs occurred oriented attachment; remaining in solution attached at surface nanowires, forming structures. films produced these demonstrate high 1.1 × 10-2 2.3 absorption luminescence, respectively, surpassing many previously nanomaterials. We employed multilayer nanowire filters, generating left- right-handed CPL.

Language: Английский

Citations

0
Efficient Ultraviolet Circularly Polarized Luminescence in Zero‐Dimensional Hybrid Cerium Bromides DOI
Chen Li, Yi Wei, Yan Zhang

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(26)

Published: April 18, 2024

Abstract Ultraviolet circularly polarized luminescence (UV‐CPL) with high photon energy shows great potential in light sources and stereoselective photopolymerization. However, developing luminescent materials UV‐CPL performance remains challenging. Here, we report a pair of rare earth Ce 3+ ‐based zero‐dimensional (0D) chiral hybrid metal halides (HMHs), R/S ‐(C 14 H 24 N 2 ) CeBr 7 , which exhibits characteristic UV emissions derived from the 5d–4f transition. The compounds show simultaneously photoluminescent quantum yields (32–39)% large dissymmetry factor (|g lum |) values (1.3–1.5)×10 −2 . Thus, figures merits are calculated to be (4.5–5.8)×10 −3 superior reported emissive materials. Additionally, nearly 91 % their PL intensities at 300 K can well preserved 380 (LED operating temperature) without phase transition or decomposition, demonstrating excellent structural optical thermal stabilities Based on these enantiomers, fabricated UV‐emitting CP‐LEDs exhibit polarization degrees ±1.0 %. Notably, generated devices significantly trigger enantioselective photopolymerization diacetylene remarkable stereoselectivity, consequently yield polymerized products anisotropy factors circular dichroism (g CD up ±3.9×10 outperforming other as UV‐polarized sources.

Language: Английский

Citations

2
Energy Transfer for Constructing Circularly Polarized Luminescence Materials: Recent Progress and Future Prospects DOI
Run Zhang, Hai Zhong, Kai Yang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 14, 2024

Abstract Circularly polarized luminescence (CPL) materials hold significant promise in multidisciplinary fields such as circularly organic light‐emitting diodes, biological probes, data storage, and information encryption. However, these cutting‐edge applications also put forward higher requirements for the design of CPL materials, requiring large dissymmetry factor high emission quality. For this purpose, diverse approaches have been explored to generate enhance emission. Among them, energy transfer (ET) strategy stands out it can be readily implemented a wide range materials. The present work overviews latest advances generating modulating CPL, involving small molecules, polymers, metal complexes, liquid crystals, well new‐emerging chiral luminescent It is anticipated that review article will garner increased attention toward systems facilitate advancement

Language: Английский

Citations

2
Semiconductor nanocrystals‐based triplet‐triplet annihilation photon‐upconversion: Mechanism, materials and applications DOI Creative Commons

Kezhou Chen,

Qingxin Luan, Tiegen Liu

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

Abstract Triplet‐triplet annihilation photon upconversion (TTA‐UC) has emerged as a promising strategy for enhancing solar energy harvesting efficiency by converting two low‐energy, long‐wavelength photons into high‐energy, short‐wavelength photon. In recent years, semiconductor nanocrystals have gained significant attention efficient photosensitizers TTA‐UC due to their excellent triplet transfer and the ability tune bandgap across spectrum. This review focuses on mechanism of NC‐based TTA‐UC, emphasizing key parameters evaluate performance systems. The influence various material‐related factors overall is thoroughly discussed. Moreover, advances in solid‐state approaches are highlighted, along with an overview current status applications this field. Lastly, identifies challenges opportunities that lie ahead future development providing insights potential advancements directions further research.

Language: Английский

Citations

0