Two-step vapor deposition of self-catalyzed large-size PbI<sub>2</sub> nanobelts for high-performance photodetectors

Han, Mingming; Sun, Jiamin; Bian, Luozhen; Wang, Zhou; Zhang, Lei; Yin, Yanxue; Gao, Zhaofeng; Li, Fulin; Xin, Qian; He, Longbin; Han, Ning; Song, Aimin; Yang, Zaixing

doi:10.1039/c8tc01180j

Cited by 33 publications

(37 citation statements)

References 60 publications

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“…[ 29 ] A typical 2D layered semiconductor, lead iodide (PbI 2 ) with an energy gap in the range 2.2–2.6 eV has attracted our concern. [ 30,31 ] The pure PbI 2 only detects near ultraviolet and visible light, severely limiting its potential applications. Therefore, many people have put a lot of efforts on it.…”

Section: Introductionmentioning

confidence: 99%

High Sensitive and Broadband Photodetectors Based on Hybrid PbI₂ Nanosheet/CdSe Nanobelt

Cheng

et al. 2021

Advanced Optical Materials

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The limited detection of lead iodide (PbI2) to visible light hinders the further development of PbI2 in the field of optoelectronic applications. A photodetector based on PbI2 nanosheet/CdSe nanobelt (PbI2 NS/CdSe NB) is prepared for the first time. This composite structure exhibits broadband spectral photoresponse from ultraviolet (400 nm) to red (730 nm). More importantly, PbI2 NS/CdSe NB can promote the effective separation of electron–hole pairs and improve the photoelectric performance. Compared to single PbI2 NS, the PbI2 NS/CdSe NB photodetector exhibits higher light–dark current ratio (6.778 × 103 A), responsivity (347.57 A W−1), and detectivity (3.625 × 1015 Jones) under 490 nm illumination. A new strategy is provided here to design broadband and high‐performance photodetectors.

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Section: Introductionmentioning

confidence: 99%

High Sensitive and Broadband Photodetectors Based on Hybrid PbI₂ Nanosheet/CdSe Nanobelt

Cheng

et al. 2021

Advanced Optical Materials

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“…Traditionally, the growth of PbI 2 single crystals can be carried out using the Bridgman−Stockbarger method [9] and the Czochralski method [10]. However, some physical and chemical methods, such as physical vapor deposition (PVD) [11], liquid solution method [12], vapor−liquid−solid method [13], and hydrothermal synthesis [14] have been successfully used to synthesize PbI 2 nanobelts or nanowires. To date, growing PbI 2 single crystals with high chemical and structural quality has been challenging but essential for high performance detectors.…”

Section: Introductionmentioning

confidence: 99%

PbI2 Single Crystal Growth and Its Optical Property Study

et al. 2019

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In this work, we used the chemical vapor transport (CVT) method to grow PbI2 crystals using iodine as a self-transporting agent. The crystals’ structure, composition, and uniformity were confirmed by X-ray diffraction (XRD) and electron probe microanalysis (EPMA) measurements. We investigated the band gap energy using absorption spectroscopy measurements. Furthermore, we explored the temperature dependence of the band gap energy, which shifts from 2.346 eV at 300 K to 2.487 eV at 20 K, and extracted the temperature coefficients. A prototype photodetector with a lateral metal–semiconductor–metal (MSM) configuration was fabricated to evaluate its photoelectric properties using a photoconductivity spectrum (PC) and persistent photoconductivity (PPC) experiments. The resonance-like PC peak indicates the excitonic transition in absorption. The photoresponse ILight/IDark-1 is up to 200%.

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“…Layered PbI 2 has been shown to be excellent candidate for use in optoelectronic applications, photodetectors, and photon detection [20][21][22][23] . Ultrathin PbI 2 is an interesting system for studying quantum-confinement effects because the exciton-phonon couplings are dependent on the degree of localization of electronic charge 24,25 .…”

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Atomic structure and defect dynamics of monolayer lead iodide nanodisks with epitaxial alignment on graphene

et al. 2020

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Lead Iodide (PbI 2 ) is a large bandgap 2D layered material that has potential for semiconductor applications. However, atomic level study of PbI 2 monolayer has been limited due to challenges in obtaining thin crystals. Here, we use liquid exfoliation to produce monolayer PbI 2 nanodisks (30-40 nm in diameter and > 99% monolayer purity) and deposit them onto suspended graphene supports to enable atomic structure study of PbI 2 . Strong epitaxial alignment of PbI 2 monolayers with the underlying graphene lattice occurs, leading to a phase shift from the 1 T to 1 H structure to increase the level of commensuration in the two lattice spacings. The fundamental point vacancy and nanopore structures in PbI 2 monolayers are directly imaged, showing rapid vacancy migration and self-healing. These results provide a detailed insight into the atomic structure of monolayer PbI 2 , and the impact of the strong van der Waals interaction with graphene, which has importance for future applications in optoelectronics.

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Two-step vapor deposition of self-catalyzed large-size PbI₂ nanobelts for high-performance photodetectors

Abstract: Large-size, single-crystalline and high-density PbI2 nanobelts are successfully synthesized by a two-step vapor deposition process at a slow heating rate.

Cited by 33 publications

References 60 publications

High Sensitive and Broadband Photodetectors Based on Hybrid PbI₂ Nanosheet/CdSe Nanobelt

High Sensitive and Broadband Photodetectors Based on Hybrid PbI₂ Nanosheet/CdSe Nanobelt

PbI2 Single Crystal Growth and Its Optical Property Study

Atomic structure and defect dynamics of monolayer lead iodide nanodisks with epitaxial alignment on graphene

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Two-step vapor deposition of self-catalyzed large-size PbI2 nanobelts for high-performance photodetectors

Abstract: Large-size, single-crystalline and high-density PbI2 nanobelts are successfully synthesized by a two-step vapor deposition process at a slow heating rate.

Cited by 33 publications

References 60 publications

High Sensitive and Broadband Photodetectors Based on Hybrid PbI2 Nanosheet/CdSe Nanobelt

High Sensitive and Broadband Photodetectors Based on Hybrid PbI2 Nanosheet/CdSe Nanobelt

PbI2 Single Crystal Growth and Its Optical Property Study

Atomic structure and defect dynamics of monolayer lead iodide nanodisks with epitaxial alignment on graphene

Contact Info

Product

Resources

About

Two-step vapor deposition of self-catalyzed large-size PbI₂ nanobelts for high-performance photodetectors

High Sensitive and Broadband Photodetectors Based on Hybrid PbI₂ Nanosheet/CdSe Nanobelt

High Sensitive and Broadband Photodetectors Based on Hybrid PbI₂ Nanosheet/CdSe Nanobelt