Enabling Efficient Blue‐Emissive Circularly Polarized Luminescence by In Situ Crafting of Chiral Quasi‐2D Perovskite Nanosheets within Polymer Nanofibers

Wen, Zhangchuan; Lu, Rong; Gu, Fan; Zheng, Kai; Zhang, Lijie; Jin, Huile; Chen, Yihuang; Wang, Shun; Pan, Shuang

doi:10.1002/adfm.202212095

Cited by 27 publications

(26 citation statements)

References 52 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We find that the intensity differences for chiral (R) and (S) samples cover a broad wavelength range from 480 to 600 nm. Such broad CPL signals are also found in other chiral perovskites ( 16 , 28 , 39 , 40 ), which may derive from strong electron-phonon interaction in low-dimensional perovskites. Quantitatively, the degrees of polarization of CPL can be expressed asPCPL=Iσ+−Iσ−Iσ++Iσ−where I σ + and I σ − are the integrated PL spectral intensities with right-handed and left-handed detectors, respectively.…”

Section: Resultsmentioning

confidence: 70%

Bright circularly polarized photoluminescence in chiral layered hybrid lead-halide perovskites

Liu,

Kepenekian,

Bodnar

et al. 2023

Sci. Adv.

View full text Add to dashboard Cite

Hybrid perovskite semiconductor materials are predicted to lock chirality into place and encode asymmetry into their electronic states, while softness of their crystal lattice accommodates lattice strain to maintain high crystal quality with low defect densities, necessary for high luminescence yields. We report photoluminescence quantum efficiencies as high as 39% and degrees of circularly polarized photoluminescence of up to 52%, at room temperature, in the chiral layered hybrid lead-halide perovskites (R/S/Rac)-3BrMBA 2 PbI 4 [3BrMBA = 1-(3-bromphenyl)-ethylamine]. Using transient chiroptical spectroscopy, we explain the excellent photoluminescence yields from suppression of nonradiative loss channels and high rates of radiative recombination. We further find that photoexcitations show polarization lifetimes that exceed the time scales of radiative decays, which rationalize the high degrees of polarized luminescence. Our findings pave the way toward high-performance solution-processed photonic systems for chiroptical applications and chiral-spintronic logic at room temperature.

show abstract

Section: Resultsmentioning

confidence: 70%

Bright circularly polarized photoluminescence in chiral layered hybrid lead-halide perovskites

Liu,

Kepenekian,

Bodnar

et al. 2023

Sci. Adv.

View full text Add to dashboard Cite

show abstract

“…Hence, more attempts need to focus on exploring effective strategies such as heterostructures to improve the stability of chiral PeNCs. [152][153][154] The toxicity of the lead element is also a concern. Under such circumstances, more effective strategies should be developed to replace toxic lead with non-toxic ions.…”

Section: Discussionmentioning

confidence: 99%

Chiral Lead Halide Perovskite Nanocrystals: Construction Strategies and Photophysical Properties

He,

Cui,

et al. 2023

Adv Quantum Tech

View full text Add to dashboard Cite

Lead halide perovskite nanocrystals (PeNCs) have attracted intense interest by virtue of their numerous remarkable optoelectronic properties, which render them promising for various optoelectronic applications. Over the past few years, substantial progress has been made in the study of chiral PeNCs, from the sample preparation, spectroscopic characterization to practical applications. In this review, the state‐of‐the‐art progress of the construction strategies and photophysical properties of chiral PeNCs has been summarized. The focus is placed on emerging developments in terms of synthetic methods, chiroptical properties, nonlinear optics, and chiral spintronics in chiral PeNCs. In the end, there is a discussion on the current challenges and future prospects in this versatile, rapidly evolving field.

show abstract

“…[33] Recently, hypothesized mechanisms like chiral Förster resonance energy transfer, [47] or CPL photon upconversion, [48] and strategies, for example, based on the assembly of small molecules into chiral supramolecular structures [49][50][51][52][53] or direction-dependent CPL [22,54] were successfully employed to push the boundaries of accessible dissymmetry factors. Chiral inorganic or hybrid semiconductors, [55,56] such as chiral halide perovskites in various morphologies (bulk, [57] chains, [58] sheets, [59] nanocrystals [60,61] ) and chiral metal nanoparticles [62,63] (typically leveraging plasmon resonances) are also promising candidates for next-generation CPL emitters.…”

Section: Introductionmentioning

confidence: 99%

Fundamentals, Advances, and Artifacts in Circularly Polarized Luminescence (CPL) Spectroscopy

Kitzmann,

Freudenthal,

Reponen

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Objects are chiral when they cannot be superimposed with their mirror image. Materials can emit chiral light with an excess of right‐ or left‐handed circular polarization. This circularly polarized luminescence (CPL) is key to promising future applications, such as highly efficient displays, holography, sensing, enantiospecific discrimination, synthesis of drugs, quantum computing, and cryptography. Here, a practical guide to CPL spectroscopy is provided. First, the fundamentals of the technique are laid out and a detailed account of recent experimental advances to achieve highly sensitive and accurate measurements is given, including all corrections required to obtain reliable results. Then the most common artifacts and pitfalls are discussed, especially for the study of thin films, for example, based on molecules, polymers, or halide perovskites, as opposed to dilute solutions of emitters. To facilitate the adoption by others, custom operating software is made publicly available, equipping the reader with the tools needed for successful and accurate CPL determination.

show abstract

Enabling Efficient Blue‐Emissive Circularly Polarized Luminescence by In Situ Crafting of Chiral Quasi‐2D Perovskite Nanosheets within Polymer Nanofibers

Abstract: Chiral metal halide perovskites have emerged as a class of highly intriguing circularly polarized luminescence (CPL)-

Cited by 27 publications

References 52 publications

Bright circularly polarized photoluminescence in chiral layered hybrid lead-halide perovskites

Bright circularly polarized photoluminescence in chiral layered hybrid lead-halide perovskites

Chiral Lead Halide Perovskite Nanocrystals: Construction Strategies and Photophysical Properties

Fundamentals, Advances, and Artifacts in Circularly Polarized Luminescence (CPL) Spectroscopy

Contact Info

Product

Resources

About