Metal Immiscibility Route to Synthesis of Ultrathin Carbides, Borides, and Nitrides

Wang, Zixing; Kochat, Vidya; Pandey, Prafull; Kashyap, Sanjay; Chattopadhyay, Soham; Samanta, Atanu; Sarkar, Suman; Manimunda, Praveena; Zhang, Xiang; Asif, S. A. Syed; Singh, Akhilesh Kumar; Chattopadhyay, K.; Tiwary, Chandra Sekhar; Ajayan, Pulickel M.

doi:10.1002/adma.201700364

Cited by 66 publications

(44 citation statements)

References 60 publications

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“…[ 29 ] Although this selective etching method is efficient, it is essential to get rid of HF, considering its serious toxicity and surface‐fluorine groups unfavored for biomedical applications. [ 30–32 ] Recently, exclusively Cl‐terminated MXenes (Ti 3 C 2 Cl 2 and Ti 2 CCl 2 ) were obtained in the molten ZnCl 2 (a Lewis acid) environment, known as a nonfluorine chemical approach. [ 14b ] Both the theoretical and experimental studies have revealed the thermal stability of the chloride termination.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in 2D MXenes for Photodetection

Ren

et al. 2020

Adv Funct Materials

149

112

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A new class of 2D transition metal carbides, carbonitrides and nitrides, termed MXenes, has emerged as a new candidate for many applications in electronics, optoelectronics, and energy storage. Since their first discovery in 2011, MXenes have gathered increasingly more interest owing to their unique physical, chemical, and mechanical properties that can be tuned by different surface terminations and transition metals. In particular, the intriguing optical and electrical properties, including transparency, saturable absorption, and high conductivity, grant MXenes various roles in photodetectors, such as transparent electrodes, Schottky contacts, photoabsorbers, and plasmonic materials. Given the solution‐processability, MXenes also hold great potential for large‐scale synthesis, and thus are favored for a number of electronic and photonic device applications. In this review, recent advances in photodetectors based on 2D MXenes are summarized. Despite the fact that such applications have only recently been explored compared with other 2D materials, MXenes have shown promise in low‐cost and high‐performance photodetection.

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Section: Introductionmentioning

confidence: 99%

Recent Advances in 2D MXenes for Photodetection

Ren

et al. 2020

Adv Funct Materials

149

112

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“…The small lateral size and thermal instability of MXene also limits its application in planar optoelectronic devices [34]. The chemical vapor deposition (CVD) method offers a new way to synthesize large-area 2D TMCs (such as Mo 2 C, TaC, and WC) and their derivatives, without surface terminations [35][36][37][38][39][40]. Ultrathin Mo 2 C crystals with a work function of 3.8 eV, prepared by the CVD method, are both thermally (they remain stable in air at 200 °C) and environmentally stable under H 2 plasma treatment [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

MoS2-Based Photodetectors Powered by Asymmetric Contact Structure with Large Work Function Difference

et al. 2019

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HIGHLIGHTS • 2D Mo 2 C was produced by a modified chemical vapor deposition method, and 2D Mo 2 C-Au was formed as an asymmetric contact structure with a large work function difference. • Mo 2 C/MoS 2 /Au photodetectors powered by asymmetric contact structure can work under self-powered condition with a responsivity of 10 −1 mA W −1. The detection performance of the photodetectors can be stable for at least 110 days.

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“…Small lateral dimensions and thermal instability have made it difficult for MCene-based electrodes to meet the needs of optoelectronic devices. Fortunately, the chemical vapor deposition (CVD) method provides an effective way to prepare large-area and thermally stable TMCs [17,18,19]. However, the pure TMC film prepared by the CVD method tends to grow vertically during the growth process, which is disadvantageous for its application in the transparent electrode [20].…”

Section: Introductionmentioning

confidence: 99%

Controlled Growth of an Mo2C—Graphene Hybrid Film as an Electrode in Self-Powered Two-Sided Mo2C—Graphene/Sb2S0.42Se2.58/TiO2 Photodetectors

Kang

Zheng

Wei

et al. 2019

Sensors

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The monotonic work function of graphene makes it difficult to meet the electrode requirements of every device with different band structures. Two-dimensional (2D) transition metal carbides (TMCs), such as carbides in MXene, are considered good candidates for electrodes as a complement to graphene. Carbides in MXene have been used to make electrodes for use in devices such as lithium batteries. However, the small lateral size and thermal instability of carbides in MXene, synthesized by the chemically etching method, limit its application in optoelectronic devices. The chemical vapor deposition (CVD) method provides a new way to obtain high-quality ultrathin TMCs without functional groups. However, the TMCs film prepared by the CVD method tends to grow vertically during the growth process, which is disadvantageous for its application in the transparent electrode. Herein, we prepared an ultrathin Mo2C—graphene (Mo2C—Gr) hybrid film by CVD to solve the above problem. The work function of Mo2C—Gr is between that of graphene and a pure Mo2C film. The Mo2C—Gr hybrid film was selected as a transparent hole-transporting layer to fabricate novel Mo2C—Gr/Sb2S0.42Se2.58/TiO2 two-sided photodetectors. The Mo2C—Gr/Sb2S0.42Se2.58/TiO2/fluorine-doped tin oxide (FTO) device could detect light from both the FTO side and the Mo2C—Gr side. The device could realize a short response time (0.084 ms) and recovery time (0.100 ms). This work is believed to provide a powerful method for preparing Mo2C—graphene hybrid films and reveals its potential applications in optoelectronic devices.

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Metal Immiscibility Route to Synthesis of Ultrathin Carbides, Borides, and Nitrides

Cited by 66 publications

References 60 publications

Recent Advances in 2D MXenes for Photodetection

Recent Advances in 2D MXenes for Photodetection

MoS2-Based Photodetectors Powered by Asymmetric Contact Structure with Large Work Function Difference

Controlled Growth of an Mo2C—Graphene Hybrid Film as an Electrode in Self-Powered Two-Sided Mo2C—Graphene/Sb2S0.42Se2.58/TiO2 Photodetectors

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