<i>Penta</i>‐PdPSe: A New 2D Pentagonal Material with Highly In‐Plane Optical, Electronic, and Optoelectronic Anisotropy

Li, Peiyang; Zhang, Jiantian; Zhu, Chao; Shen, Wanfu; Hu, Chunguang; Fu, Wei; Luo, Yan; Zhou, Liujiang; Zheng, Lu; Lei, Hongxiang; Liu, Zheng; Zhao, Weina; Gao, Pingqi; Yu, Peng; Yang, Guowei

doi:10.1002/adma.202102541

Cited by 75 publications

(97 citation statements)

References 67 publications

(88 reference statements)

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“…[28] The penta-PdPSe was also synthesized as a new 2D pentagonal Material with high in-plane optical anisotropy. [31] The penta-PdPSe has a remarkably high on/off ratio of 10 8 and large dichroic photoresponsivity of 6.17 at 808 nm, showing high potential in high-performance field-effect transistors (FETs) and photodetectors.…”

Section: Monochalcogenidesmentioning

confidence: 99%

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Liu

et al. 2021

Laser & Photonics Reviews

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Anisotropic 2D materials are promising building blocks for future photonic and optoelectronic devices due to their low structural symmetry and in-plane optical anisotropy. This review systematically summarizes the crystalline structure, growth dynamics, optical anisotropy and their modulation strategies, and the corresponding photonic applications for emerging anisotropic 2D materials. First, the physical properties and crystalline structures of typical anisotropic 2D materials are briefly introduced. After that, special attention is paid to the growth mechanism of low-symmetry lattices, where the competition between different growth modes determines the crystal morphologies. Then, the physical principles of anisotropic optical absorption, photoluminescence, Raman scattering, photodetection, and nonlinear response are discussed based on recent scientific advances. The discussion on the techniques to modify the intrinsic in-plane anisotropy, along with the possibility of introducing optical anisotropy to the isotropic materials, add a new degree of freedom to the control over their optical properties. The review of application prospects also helps bridge the gap between the scientific exploration of novel anisotropic materials and the development of polarization-sensitive photonic devices. The discussions in this review will push forward the scientific frontier in the crystalline growth and anisotropy control of anisotropic 2D materials.

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Section: Monochalcogenidesmentioning

confidence: 99%

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Liu

et al. 2021

Laser & Photonics Reviews

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“…[7] Moreover, 2D materials with unique crystal structure, such as pentagonal structure, exhibit excellent air stability, which is a crucial criterion for the practical application. [8] In recent years, various 2D materials like black-phosphorus (b-P), [9] tellurium, [10] MoS 2 , [11] ReS 2 , [12] ReSe 2 , [13] and PdPSe [14] have been applied in the research of photodetectors. Although these materials, as the main candidates for the next generation of photodetectors, express admirable photoelectric performances, they still show the obvious wavelength selectivity.…”

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confidence: 99%

Polarimetric Image Sensor and Fermi Level Shifting Induced Multichannel Transition Based on 2D PdPS

et al. 2021

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2D materials have been attracting high interest in recent years due to their low structural symmetry, excellent photoresponse, and high air stability. However, most 2D materials can only respond to specific light, which limits the development of wide‐spectrum photodetectors. Proper bandgap and the regulation of Fermi level are the foundations for realizing electronic multichannel transition, which is an effective method to achieve a wide spectral response. Herein, a noble 2D material, palladium phosphide sulfide (PdPS), is designed and synthesized. The bandgap of PdPS is around 2.1 eV and the formation of S vacancies, interstitial Pd and P atoms promote the Fermi level very close to the conduction band. Therefore, the PdPS‐based photodetector shows impressive wide spectral response from solar‐blind ultraviolet to near‐infrared based on the multichannel transition. It also exhibits superior optoelectrical properties with photoresponsivity (R) of 1 × 103 A W−1 and detectivity (D*) of 4 × 1011 Jones at 532 nm. Moreover, PdPS exhibits good performance of polarization detection with dichroic ratio of ≈3.7 at 808 nm. Significantly, it achieves polarimetric imaging and hidden‐target detection in complex environments through active detection.

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“…[130] In addition, a 2D pentagonal PdPSe, owning an orthorhombic crystal structure with space group of Pbcn has been discovered. [131] Each layer consists of puckered PdP 2 Se 2 pentagons connected by the covalent P-P bonds to form a lowsymmetry puckered pentagonal layers. The A lead-free perovskite CsCu 2 I 3 , has an orthorhombic lattice structure with the space group of Cmcm, which is composed of edge-sharing [CuI 4 ]dimerized units to form a 1D chain.…”

Section: Ternarymentioning

confidence: 99%

Anisotropic Low‐Dimensional Materials for Polarization‐Sensitive Photodetectors: From Materials to Devices

Wang

Jiang

et al. 2022

Advanced Optical Materials

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of polarization states: i) Natural light, the vibrational plane of which is not fixed. The electric vectors of natural light are axisymmetric, evenly distributed in all directions and synchronously vibrating. ii) Complete polarized light can be subdivided into linearly polarized light, elliptically polarized light, and circularly polarized light. Linearly polarized light has a fixed vibrational plane. The vibrational track of its electric vector is a straight line during propagation. Elliptically polarized light, similarly, the terminal trajectory that the electric vector vibrates is an ellipse. The plane of the ellipse is perpendicular to the propagative direction of light. And the electric vector rotates constantly, the magnitude and direction of which change regularly with time. When facing the direction light propagates, if the end of the electric vector travels counterclockwise, it is a right-handed circular polarization state; if clockwise, it is a left-handed circular polarization state. Circularly polarized light is a special case of elliptically polarized light. iii) Partially polarized light, the vibration of the electric vector has a comparative advantage in a certain direction. Simply, it is the superposition of natural light and complete polarized light. Because of that common characteristic of light, the polarization state of light provides a new degree of freedom in detection and application. [18,19] Early studies of the polarization-sensitive photodetectors mainly focus on the macroscopic anisotropy, which requires complex technologies for the patterning and aligning process. [20][21][22] Anisotropic low-dimensional materials have low-symmetry crystal structures including orthorhombic, monoclinic, and triclinic so that they have intrinsic anisotropic properties [23][24][25] obtaining highly polarization sensitivity for photodetectors. [26,27] Fortunately, low-dimensional materials are emerging due to their large families, [28][29][30][31][32] fascinating photo electric characteristics, [28,[32][33][34] and naturally microscopic anisotropy among most of them. [23] From early on, the pioneering work has been done on BP-based polarization-sensitive photodetectors, which advance the development of anisotropic systems in this application. [35] According to the diversified evolution of element types, apart from black phosphorus, [36][37][38][39][40] some monoelemental 2D materials with anisotropy like black arsenic, [41,42] antimonene, [43,44] borophene, [45,46] and tellurene [47,48] have been discovered and studied. Meanwhile, a mass of anisotropic binaries have sprung up typically including

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Penta‐PdPSe: A New 2D Pentagonal Material with Highly In‐Plane Optical, Electronic, and Optoelectronic Anisotropy

Cited by 75 publications

References 67 publications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Polarimetric Image Sensor and Fermi Level Shifting Induced Multichannel Transition Based on 2D PdPS

Anisotropic Low‐Dimensional Materials for Polarization‐Sensitive Photodetectors: From Materials to Devices

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