Graphene nanomesh photodetector with effective charge tunnelling from quantum dots

Nanoscale ◽  
2015 ◽  
Vol 7 (9) ◽  
pp. 4242-4249 ◽  
Author(s):  
Xiang Liu ◽  
Nianze Liu ◽  
Mingju Liu ◽  
Zhi Tao ◽  
Wenjian Kuang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Response Time ◽  
Effective Charge ◽  
High Performance ◽  
Short Response Time ◽  
High Responsivity ◽  
Graphene Nanomesh

A high-performance photodetector is fabricated with high responsivity, high on/off ratio and short response time with the merits of GNM and QDs.

2D Ferroelectric Devices: Working Principles and Research Progresses

2021 ◽  
Author(s):  
Minghao Liu ◽  
Ting Liao ◽  
Ziqi Sun ◽  
Yuantong Gu ◽  
Liangzhi Kou
Keyword(s):  
Response Time ◽  
Energy Cost ◽  
High Performance ◽  
Ferroelectric Materials ◽  
Low Energy ◽  
Two Dimensional ◽  
Short Response Time ◽  
Storage Density ◽  
Nanoelectronic Devices ◽  
High Storage

Two-dimensional (2D) ferroelectric materials are promising to be used for high-performance nanoelectronic devices, due to the non-volatility, high storage density, low energy cost and short response time originated from the...

High-performance photodetectors based on two-dimensional tin(ii) sulfide (SnS) nanoflakes

2018 ◽  
Vol 6 (37) ◽  
pp. 10036-10041 ◽  
Author(s):  
Gangzha Liu ◽  
Yan Li ◽  
Bo Li ◽  
He Tian ◽  
Chao Fan ◽  
...  
Keyword(s):  
Response Time ◽  
Visible Light ◽  
High Performance ◽  
Fast Response ◽  
Two Dimensional ◽  
Fast Response Time ◽  
High Responsivity

A visible-light photodetector, based on two-dimensional SnS nanoflakes, exhibits an extremely high responsivity and detectivity with a fast response time.

High-responsivity photodetector based on scrolling monolayer MoS2 hybridized with carbon quantum dots.

2021 ◽  
Author(s):  
Shichao Zhang ◽  
Feng Gao ◽  
Wei Feng ◽  
Huihui Yang ◽  
Yunxia Hu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Absorption ◽  
High Performance ◽  
Carbon Quantum Dots ◽  
Monolayer Mos2 ◽  
Significant Progress ◽  
Low Light ◽  
One Dimensional ◽  
High Responsivity ◽  
Device Architecture

Abstract The monolayer MoS2 based photodetectors have been widely investigated, which show limited photoelectric performances due to its low light absorption and uncontrollable adsorbates. In this paper, we present a MoS2-based hybrid nanoscrolls device, in which one-dimensional nanoscrollsof MoS2 is hybridized with carbon quantum dots (CQDs). This device architecture effectively enhanced the photodetection performance. The photoresponsivity and detectivity values of MoS2/CQDs-NS photodetectors are respectively 1793 A W-1 and 5.97×1012 Jones, which are 830-fold and 268-fold higher than those of pristine MoS2 under 300 nm illumination at Vds = 5 V. This research indicates a significant progress in fabricating high-performance MoS2 photodetectors.

scholarly journals High responsivity and high speed InGaN-based blue-light photodetectors on Si substrates

RSC Advances ◽  
2021 ◽  
Vol 11 (40) ◽  
pp. 25079-25083
Author(s):  
Jixing Chai ◽  
Deqi Kong ◽  
Sheng Chen ◽  
Liang Chen ◽  
Wengliang Wang ◽  
...  
Keyword(s):  
Response Time ◽  
Blue Light ◽  
High Speed ◽  
High Performance ◽  
Applied Bias ◽  
High Responsivity ◽  
Si Substrates

High-performance InGaN-based blue-light PDs have been fabricated with a high responsivity of 0.49 A W−1 and a short rise/fall response time of 1.25/1.74 ms at an applied bias of −3 V.

Surface Organic Ligands-Passivated Quantum Dots: Toward High-Performance Light-Emitting Diodes with Long Lifetime

2021 ◽  
Author(s):  
Lishuang Wang ◽  
Ying Lv ◽  
Jie Lin ◽  
Jialong Zhao ◽  
Xingyuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Ligands ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Light Emitting ◽  
Long Lifetime

For quantum dots light-emitting diodes (QLEDs), typical colloidal quantum dots (QDs) are usually composed of a core/shell heterostructure which is covered with organic ligands as surface passivated materials to confine...

3D hierarchical porous N-doped carbon quantum dots/vanadium nitride hybrid microflowers as a superior electrode material toward high-performance asymmetric capacitive deionization

2021 ◽  
Author(s):  
Jingxuan Zhao ◽  
Zhibo Zhao ◽  
Yang Sun ◽  
Xiangdong Ma ◽  
Meidan Ye ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electrode Material ◽  
High Performance ◽  
Carbon Nanomaterials ◽  
Electrode Materials ◽  
Carbon Quantum Dots ◽  
Vanadium Nitride ◽  
Capacitive Deionization ◽  
Hierarchical Porous

Taking into account of time-confusing preparation processing and unsatisfied desalination capacity of carbon nanomaterials, exploring efficient electrode materials remains a great challenge for practical capacitive deionization (CDI) application. In this...

scholarly journals Dual-Cation Electrolytes Crosslinked with MXene for High-Performance Electrochromic Devices

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 874
Author(s):  
Soyoung Bae ◽  
Youngno Kim ◽  
Jeong Min Kim ◽  
Jung Hyun Kim
Keyword(s):  
Ionic Conductivity ◽  
Response Time ◽  
Indium Tin Oxide ◽  
High Performance ◽  
Fast Response ◽  
High Ionic Conductivity ◽  
Electrochromic Device ◽  
Fast Response Time ◽  
Coloration Efficiency ◽  
Conduction Pathway

MXene, a 2D material, is used as a filler to manufacture polymer electrolytes with high ionic conductivity because of its unique sheet shape, large specific surface area and high aspect ratio. Because MXene has numerous -OH groups on its surface, it can cause dehydration and condensation reactions with poly(4-styrenesulfonic acid) (PSSA) and consequently create pathways for the conduction of cations. The movement of Grotthuss-type hydrogen ions along the cation-conduction pathway is promoted and a high ionic conductivity can be obtained. In addition, when electrolytes composed of a conventional acid or metal salt alone is applied to an electrochromic device (ECD), it does not bring out fast response time, high coloration efficiency and transmittance contrast simultaneously. Therefore, dual-cation electrolytes are designed for high-performance ECDs. Bis(trifluoromethylsulfonyl)amine lithium salt (LiTFSI) was used as a source of lithium ions and PSSA crosslinked with MXene was used as a source of protons. Dual-Cation electrolytes crosslinked with MXene was applied to an indium tin oxide-free, all-solution-processable ECD. The effect of applying the electrolyte to the device was verified in terms of response time, coloration efficiency and transmittance contrast. The ECD with a size of 5 × 5 cm2 showed a high transmittance contrast of 66.7%, fast response time (8 s/15 s) and high coloration efficiency of 340.6 cm2/C.

Carbon quantum dot-sensitized hollow TiO2 spheres for high-performance visible light photocatalysis

2021 ◽  
Author(s):  
Xianfeng Zhang ◽  
Zongqun Li ◽  
Shaowen Xu ◽  
Yaowen Ruan
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Performance ◽  
Carbon Quantum Dots ◽  
Visible Light Photocatalysis ◽  
Carbon Quantum Dot ◽  
Visible Light Photocatalytic

TiO2/CQD composites were synthesized through carbon quantum dots covalently attached to the surface of hollow TiO2 spheres for visible light photocatalytic degradation of organics.

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