Symmetry-Broken 2D Lead–Tin Mixed Chiral Perovskite for High Asymmetry Factor Circularly Polarized Light Detection

Yao, Bing; Wei, Qi; Yang, Yunqing; Zhou, Wenjia; Wang, Hao; Ma, Mingyu; Yu, Danni; Yang, Yingguo; Ning, Zhijun

doi:10.1021/acs.nanolett.2c05085

Cited by 47 publications

(27 citation statements)

References 33 publications

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“…Chiral perovskite materials have attracted increasing research attention owing to their many promising applications in the fields of 3D display, optical information processing, quantum optics, biological detection, and spin electronics. [1][2][3][4][5][6][7] The chiral 3D perovskites always have inherently high photoluminescence quantum yields (PLQY) at room temperature. However, the chiral optical activity originates from the lattice distortion induced by the surface chiral ligands, leading to poor CD (circular dichroism) signals.…”

Section: Introductionmentioning

confidence: 99%

Ligand‐Assisted Self‐Assembly of 3D Perovskite Nanocrystals into Chiral Inorganic Quasi‐2D Perovskites (n = 3) with Ligand‐Ratio‐Dependent Chirality Inversion

Zhao

Shao

et al. 2023

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Chiral inorganic quasi‐2D perovskites are prepared by self‐assembling 3D perovskites in solution for the first time. The quasi‐2D perovskite synthesized is a pure‐phase perovskite with <n> = 3 and is periodically arranged, which is a big breakthrough in quasi‐2D inorganic perovskites. With the individual chiral CsPbBr3 nanocrystals (NCs) assemble into quasi‐2D perovskite, the g‐factor significantly improved (≈5 × 10−3). In addition, the chiroptical activity of quasi‐2D perovskites is explored to be improved with the lateral size increasing. In the first stage of assembly, chiral optical activity is increased due to the lateral size‐dependent optical activity, while the changes in the later stages are attributable to the chiral morphology. Interestingly, chirality inversion is found to be correlated to the number of ligands. It is believed that different conformers of chiral ligands caused by steric hindrance of the original ligand oleylamine result in opposite circular dichroism (CD) polarities. The chirality inversion phenomenon is universal, regardless of the choice of ligands. This work opens up a new path for the synthesis of quasi‐2D perovskites and provides more opportunities for the modulation of chiral optical activity.

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Section: Introductionmentioning

confidence: 99%

Ligand‐Assisted Self‐Assembly of 3D Perovskite Nanocrystals into Chiral Inorganic Quasi‐2D Perovskites (n = 3) with Ligand‐Ratio‐Dependent Chirality Inversion

Zhao

Shao

et al. 2023

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“…The remarkable evolution of g Iph in self-powered mode compared to the bias mode may contribute to the accelerated separation of the spin-polarized carriers from the spontaneous polarization in self-powered mode by the internal electric fields. The performance comparison between SBFP and other PHP-based CPL detectors is shown in Figure f. ,− Notability, SBFP is the first single compound PHP that can directly detect a CPL signal in the NIR region. Compared with the reported (R/SBPEA)PbI 4 , which applies a two-photon absorption process to realize NIR CPL detection, SBFP exhibits more than two times of g I ph in the NIR region .…”

Section: Resultsmentioning

confidence: 99%

Bulk Photovoltaic Effect in Chiral Layered Hybrid Perovskite Enables Highly Sensitive Near-Infrared Circular Polarization Photodetection

Ye,

Peng,

Wei

et al. 2023

Chem. Mater.

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A bulk photovoltaic effect (BPVE), as a form of optoelectronic conversion phenomenon mostly appearing in polar materials, has shown tremendous potential in applications of solar harvesting and photodetectors. However, materials exhibiting nearinfrared (NIR) BPVEs to meet the growing requirement of night vision and modern informational technology are scarce and urged to be developed. Recently discovered polar hybrid perovskites (PHPs) with various chemical and structural tunabilities provide opportunities to obtain materials with desired optoelectronic properties. Herein, by precisely regularizing the arrangement of PbI 6 octahedra, chiral PHPs of [R/S-BEPA] 2 FAPb 2 I 7 (RBFP and SBFP, space group P2 1 , R/S-BEPA = (R/S)-1-(4-bromophenyl)ethylammonium, FA = formidinum) with a state-of-the-art bandgap (E g = 1.45 eV) were designed and synthesized successfully. Benefited from chiral polar structures and a narrow bandgap, bulk crystal devices of SBFP exhibit Vis−NIR BPVEs with an optimized open circuit voltage and short circuit current up to 0.91 V and 14 μA cm −2 , respectively. Moreover, boosted by the chiral BPVE, a broad spectrum (from 405 to 785 nm) circularly polarized light (CPL) detection with high asymmetry factors up to 0.376 based on the bulk crystal devices of SBFP was realized. Notably, SBFP is the first single compound PHP capable of directly detecting NIR CPL signals without an external absorber or a specific laser source. This work provides an ideal platform for having a deeper understanding of the interplay between the BPVE and optical helicity in the NIR region in the future.

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“…[24,25] Due to its structural diversity and large anisotropic absorption for circularly polarized light, CPL photodetectors have been fabricated based on chiral perovskites. [2,[26][27][28][29][30][31][32][33][34][35][36][37] Compared with three-dimensional organic-inorganic hybrid perovskites, the moisture stability of 2D perovskite is enhanced due to the hydrophobicity of the large intercalating ammoniums. [38][39][40][41][42] However, poor temperature, ultraviolet (UV) stability, and large electro-phonon coupling still hamper the efficiency improvement and bottleneck the commercialization of 2D chiral perovskites.…”

Section: Introductionmentioning

confidence: 99%

Interlayer Polymerization of 2D Chiral Perovskite Single‐Crystal Films toward High‐Performance Flexible Circularly Polarized Light Detection

Zhao,

Yin,

et al. 2023

Adv Funct Materials

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Abstract2D chiral perovskite has greatly boosted the development of optoelectronic devices, ranging from nonlinear optics, spintronics, and ferroelectrics to energy harvesting devices. Despite circularly polarized light (CPL) detection based on chiral perovskite has been achieved, the environmental humidity‐, ultraviolet (UV), and temperature‐induced structural degradation and its large electro‐phonon coupling restrict its commercial application. Here, this study first realizes polymerized chiral perovskite single‐crystal films by combining in situ cross‐linking polymerization with the space‐confined crystallization method. Compared with uncross‐linked chiral perovskites, cross‐linked chiral perovskites exhibit enhanced crystallinity and lattice rigidity, yielding high‐performance circularly polarized photodetectors with a maximum anisotropy factor of 0.22, the responsivity of 1.6 A W−1, and detectivity of 2.17 × 1013 Jones. In addition, flexible circularly polarized photodetectors with extremely high mechanical stability are also realized originating from the polymer‐like behavior of cross‐linked chiral perovskite single‐crystal films. This study opens up new avenues to further enhance the performance and stability of portable and wearable devices based on chiral perovskites.

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Symmetry-Broken 2D Lead–Tin Mixed Chiral Perovskite for High Asymmetry Factor Circularly Polarized Light Detection

Cited by 47 publications

References 33 publications

Ligand‐Assisted Self‐Assembly of 3D Perovskite Nanocrystals into Chiral Inorganic Quasi‐2D Perovskites (n = 3) with Ligand‐Ratio‐Dependent Chirality Inversion

Ligand‐Assisted Self‐Assembly of 3D Perovskite Nanocrystals into Chiral Inorganic Quasi‐2D Perovskites (n = 3) with Ligand‐Ratio‐Dependent Chirality Inversion

Bulk Photovoltaic Effect in Chiral Layered Hybrid Perovskite Enables Highly Sensitive Near-Infrared Circular Polarization Photodetection

Interlayer Polymerization of 2D Chiral Perovskite Single‐Crystal Films toward High‐Performance Flexible Circularly Polarized Light Detection

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