Lead‐Free Cs3Sb2Br9 Single Crystals for High Performance Narrowband Photodetector

Liu, Ping; Liu, Yuan; Zhang, Siwei; Li, Jingzhou; Wang, Chunyun; Zhao, Cong; Nie, Pengbo; Dong, Yuhan; Zhang, Xuan; Zhao, Shunzheng; Wei, Guodan

doi:10.1002/adom.202001072

Cited by 59 publications

(41 citation statements)

References 55 publications

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“…Figure 4f schematically illustrates a phototransistor based on a lead‐free Cs 3 Sb 2 Br 9 nanosheet at 480 nm with responsivity of 2.29 A W −1 , EQE of 1.8 × 10 3 %, and D * of 3.77 × 10 12 Jones made by Liu et al. [ 59 ] Under a bias of 6 V, they plotted the function relationship between the EQE and the wavelength as shown in Figure 4g. In particular, a maximum value was noticed at peak position of 480 nm and the corresponding full width at half maximum is 15 nm, which indicates the narrowband photoresponse in this photodetector.…”

Section: Photodetectors Based On Single 2d Materialsmentioning

confidence: 99%

Recent Advances in 2D Materials for Photodetectors

Jiang

Wen

Wang

et al. 2021

Adv Elect Materials

116

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Photodetection technology has been systematically studied due to wide practical applications in temperature monitoring, thermal image technology, and light communication systems. To date, photodetectors based on multitudes of 2D materials have been reported because of their excellent performance. On account of their novel physical properties with ultrathin thickness, cost‐effective preparation with mechanical transfer process, natural passivated surface without dangling bonds, various bandgaps corresponding with a wide photoresponse, and so on, new 2D materials emerge to play significant roles in the field of photodetection. In this regard, a great advance has been achieved in terms of preparation and device application, especially in the last decade. However, there are still some challenges to obtain high‐performance photodetectors, such as growing high‐quality 2D materials, achieving higher quantum efficiency, effectively separating the photogenerated electron–hole pairs, and so on. In this review, the recent development of the state‐of‐the‐art photodetection composed of 2D materials is summarized. Moreover, the key parameters and mechanisms in photodetectors are highlighted, and an overview on 2D materials and their heterostructures is provided. Finally, the strategies for improving the performance of photodetectors are also highlighted. The review will provide a guide to further practical applications in photodetection devices.

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Section: Photodetectors Based On Single 2d Materialsmentioning

confidence: 99%

Recent Advances in 2D Materials for Photodetectors

Jiang

Wen

Wang

et al. 2021

Adv Elect Materials

116

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“…[ 33,102,106 ] Wei and co‐workers reported a narrowband photodetector based on 2D hexagonal Cs 3 Sb 2 Br 9 single crystals. [ 79 ] Figure 17h displays the EQE values of the devices at different wavelengths. The results demonstrated that a high EQE of 1.8 × 10 5 % located at 480 nm with a narrow distribution, implying the narrowband response of the devices.…”

Section: Applications Of Ilfp Single Crystalsmentioning

confidence: 99%

All‐Inorganic Lead‐Free Perovskite(‐Like) Single Crystals: Synthesis, Properties, and Applications

et al. 2021

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Due to their nontoxicity, stability, and unique optoelectronic properties, all‐inorganic lead‐free halide semiconductors with perovskite and perovskite‐like structures have successfully emerged as promising optoelectronic materials for various applications, such as solar cells, light‐emitting diodes (LEDs), photodetectors, and X‐ray detectors. To further explore their practical potentials, researchers have paid more attention in all‐inorganic lead‐free perovskite (‐like) (ILFP) single crystals. For these single crystals, the advantages of large sizes, uniform surface morphology, and few defects can facilitate their excellent performances and practical applications. Besides, compared with the low dimensional and polycrystalline ILFP materials, the ILFP single crystals feature enhanced performances, including a longer carrier diffusion length and a larger light absorption coefficient, which attract a great deal of attention. Therefore, focus is on the researching progress of ILFP single crystals and the development of their preparation methods, as well as the novel properties of ILFP single crystals. In addition, the reported applications of ILFP single crystals are proposed to highlight their practical importance. With the perspective of the evolution and challenges, the current limitations of the materials and devices are discussed, followed by an inspirational outlook on their future development directions.

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“…[29,42,43] Moreover, while the adoption of X − = Br − or Cl − allows the formation of a 2D structure, the corresponding bandgap is too large for visiblelight detection. [40,[44][45][46][47][48] More generally, the external quantum efficiencies (EQEs) of A 3 M 2 X 9 photodetectors operated in self-powered mode have been rather modest, typically in the range of ≈0.5-5% (i.e., much lower compared to lead-halide perovskite photodetectors). [48][49][50] 0D/2D bismuth-based PIMs have also delivered comparatively low EQEs in self-powered mode.…”

Section: Introductionmentioning

confidence: 99%

“…[48][49][50] 0D/2D bismuth-based PIMs have also delivered comparatively low EQEs in self-powered mode. [51,52] Therefore, it is not surprising that most photodetector studies to date featuring antimony-and bismuthbased PIMs have resorted to operation with an applied bias voltage, [38][39][40][44][45][46][47][53][54][55][56][57][58] as that can generally mitigate the effects of an inefficient photoconversion process.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to a large photoconversion efficiency, real-world applications require photodetectors to deliver a photoresponse that is linear with optical power. Interestingly, most photodetectors comprising antimony-and bismuth-based PIMs have revealed a strongly sublinear photoresponse to date, [38][39][40]46,47,[49][50][51][52][53][54][55][56][57]59] which suggests the presence of broad, non-uniform distributions of defect levels within the forbidden gap. [60][61][62] Among the very few implementations exhibiting a linear behavior, those operated in self-power mode could maintain their linearity over an optical power range narrower than three orders of magnitude (i.e., appreciably narrower than lead-halide perovskite photodetectors).…”

Section: Introductionmentioning

confidence: 99%

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Two‐Dimensional Antimony‐Based Perovskite‐Inspired Materials for High‐Performance Self‐Powered Photodetectors

Mei

Liu

Vivo

et al. 2021

Adv Funct Materials

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The ongoing Internet of Things revolution has led to strong demand for lowcost, ubiquitous light sensing based on easy-to-fabricate, self-powered photodetectors. While solution-processable lead-halide perovskites have raised significant hopes in this regard, toxicity concerns have prompted the search for safer, lead-free perovskite-inspired materials (PIMs) with similar optoelectronic potential. Antimony-and bismuth-based PIMs are found particularly promising; however, their self-powered photodetector performance to date has lagged behind the lead-based counterparts. Aiming to realize the full potential of antimony-based PIMs, this study examines, for the first time, the impact of their structural dimensionality on their self-powered photodetection capabilities, with a focus on 2D Cs 3 Sb 2 I 9−x Cl x and Rb 3 Sb 2 I 9 and 0D Cs 3 Sb 2 I 9 . The 2D absorbers deliver cutting-edge self-powered photodetector performance, with a more-thantenfold increase in external quantum efficiency (up to 55%), speed of response (>5 kHz), and linear dynamic range (>four orders of magnitude) compared to prior self-powered A 3 M 2 X 9 implementations (A + : monovalent cation; M 3+ : Sb 3+ / Bi 3+ ; X − : halide anion). Detailed characterization reveals that such a performance boost originates from the superior carrier lifetimes and reduced exciton self-trapping enabled by the 2D structure. By delivering cutting-edge performance and mechanistic insight, this study represents an important step in lead-free perovskite-inspired optoelectronics toward self-powered, ubiquitous light sensing.

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Lead‐Free Cs₃Sb₂Br₉ Single Crystals for High Performance Narrowband Photodetector

Cited by 59 publications

References 55 publications

Recent Advances in 2D Materials for Photodetectors

Recent Advances in 2D Materials for Photodetectors

All‐Inorganic Lead‐Free Perovskite(‐Like) Single Crystals: Synthesis, Properties, and Applications

Two‐Dimensional Antimony‐Based Perovskite‐Inspired Materials for High‐Performance Self‐Powered Photodetectors

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