Graphdiyne Visible‐Light Photodetector with Ultrafast Detectivity

Abstract

Two‐dimensional (2D) materials have captured a tremendous amount of attention worldwide due to their unique physical and chemical properties. Herein, a mesoscopic graphdiyne (GDY) film is prepared through a facile solution method and directly used to construct an ultra‐fast visible light detector. This GDY thin film‐based photodetector exhibits both stable and repeatable high‐performance photoelectric responses to the visible light with various wavelengths. Among the visible light range, the GDY thin film is discovered to be most sensitive to 640 nm laser, which can enable it to achieve the highest response value of up to 46300%, thus conferring GDY materials an undeniable superiority of application in photoelectric devices. Especially, such GDY‐based detectors demonstrate ultra‐fast response speeds with an ephemeral response/recovery time of only 5.15/19.83 µs, which is far better than most reported photosensitive materials, including inorganic materials, low‐dimensional composites, and heterojunctions. This study suggests that GDY thin films can be regarded as new promising candidates for application as rapid photoelectric sensors. More importantly, this paper reveals the vast potential of such sp‐hybridized carbon as novel carbon‐based semiconductors in future optoelectronic applications due to their unique structure and energy band.

Research of Low-Dimensional Carbon-Based Magnetic Materials

“…The unique sp 2 carbon atom structure makes it easily modifiable, providing an excellent host material for magnetic carbon materials . In contrast with graphene’s zero-bandgap feature, graphdiyne (GDY) composed of sp and sp 2 hybridized carbon, − possesses both two-dimensional planar reticulated structure and semiconductor properties. , GDY has recently flourished as a potential candidate for carbon-based magnetic semiconductors since this material has acquired an inherent direct bandgap, high mobility, and a mild chemical preparation method. , Though pristine GDY only exhibits paramagnetism, more active sites are beneficial for the introduction of magnetism, making it possible to prepare magnetic carbon-based semiconductors. , …”

“…21,22 Though pristine GDY only exhibits paramagnetism, 23 more active sites are beneficial for the introduction of magnetism, making it possible to prepare magnetic carbon-based semiconductors. 24,25 In this Review, the structural characteristics of three different host carbon materials are presented and various methods for the preparation of these carbon-based magnetic materials are introduced. The advantages and disadvantages of the corresponding methods and raw material structures are summarized in detail.…”

Pressure Engineering for Extending Spectral Response Range and Enhancing Photoelectric Properties of Iodine

“…In recent years, emerging 2D materials including black phosphorus, [1,2] MXenes, [3,4] graphdiyne, [5,6] transitionmetal dichalcogenides, [7,8] and metal halides MX n (M = metal, X = Cl, Br, I, n = 2, 3) [9][10][11][12][13][14] have attracted tremendous interest due to their excellent electrical, optical, and magnetic properties. Among these materials, 2D layered binary iodides with bandgaps in the range of 1.1-1.7 eV, that is, BiI 3 , [9][10][11] PbI 2 , [12] and RhI 3 , [13,14] have been found to have excellent properties for optoelectronic applications.…”

Advances in Self-Powered Ultraviolet Photodetectors Based on P-N Heterojunction Low-Dimensional Nanostructures

“…So far, researchers have made a lot of efforts and many gratifying developments have been acquired, but self-powered UV photodetectors with higher performance are still highly desired. On the one hand, exploring novel nanostructures that can promote the separation of photogenerated e-h pairs and be prepared by simple and stable methods may still be an important direction in the future; on the other hand, with the emergence of new high-performance semiconductor materials (such as graphdiyne [ 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 ], h-BN [ 112 , 113 , 114 , 115 , 116 ], perovskites [ 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 ], black phosphorus [ 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 ], and MoS 2 [ 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 ]), the situation of inorganic semiconductors as leading materials in self-powered photodetectors may be changed. In addition, inspired by the rise of wearable photodetectors in recent years, the new generation of photodetectors needs to be designed to be more dexterous and intelligent, which obviously puts forward new requir...…”