scholarly journals Mn2+ induced significant improvement and robust stability of radioluminescence in Cs3Cu2I5 for high-performance nuclear battery

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaoming Li ◽  
Jiaxin Chen ◽  
Dandan Yang ◽  
Xi Chen ◽  
Dongling Geng ◽  
...  
Keyword(s):  
High Performance ◽  
Light Yield ◽  
Structure Design ◽  
Photovoltaic Device ◽  
Impact Excitation ◽  
Device Structure ◽  
Total Irradiation ◽  
High Light Yield ◽  
Nuclear Batteries ◽  
Nuclear Battery

AbstractFluorescent type nuclear battery consisting of scintillator and photovoltaic device enables semipermanent power source for devices working under harsh circumstances without instant energy supply. In spite of the progress of device structure design, the development of scintillators is far behind. Here, a Cs3Cu2I5: Mn scintillator showing a high light yield of ~67000 ph MeV−1 at 564 nm is presented. Doping and intrinsic features endow Cs3Cu2I5: Mn with robust thermal stability and irradiation hardness that 71% or >95% of the initial radioluminescence intensity can be maintained in an ultra-broad temperature range of 77 K-433 K or after a total irradiation dose of 2590 Gy, respectively. These superiorities allow the fabrication of efficient and stable nuclear batteries, which show an output improvement of 237% respect to the photovoltaic device without scintillator. Luminescence mechanisms including self-trapped exciton, energy transfer, and impact excitation are proposed for the anomalous dramatic radioluminescence improvement. This work will open a window for the fields of nuclear battery and radiography.

Mn2+ Induced Significant Improvement and Robust Stability of Radioluminescence in Cs3Cu2I5 for High Performance Nuclear Battery

2020 ◽  
Author(s):  
Haibo Zeng ◽  
Xiaoming Li ◽  
Jiaxin Chen ◽  
Dandan Yang ◽  
Xi Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Light Yield ◽  
Structure Design ◽  
Emission Wavelength ◽  
Impact Excitation ◽  
Device Structure ◽  
Long Wavelength ◽  
High Light Yield ◽  
Nuclear Battery

Abstract Fluorescent type nuclear battery (NB) consisting of scintillator and photovoltaic device (PVD) enables semipermanent power source for both small and large devices working under harsh circumstances without instant energy supply. In spite of the progress of device structure design, the development of scintillators with high light yield (LY) and longer emission wavelength catering to PVDs is far behind. Here, a novel Cs3Cu2I5: Mn scintillator, which exhibits an ultrahigh LY of ~ 67000 ph/MeV at an emission wavelength of 564 nm is presented, and this is the highest value at such a long wavelength based on low cost precursors. Besides, doping and intrinsic features endow Cs3Cu2I5: Mn with robust thermal stability and irradiation hardness that 71% or > 90% of the initial radioluminescence (RL) intensity can be maintained in an ultra-broad temperature range of 77 K-433 K or after a total irradiation dose of 38.7 Gy at 333 K, respectively. These superiorities allow the fabrication of an efficient and stable NB, which showed an output improvement of 337% respect to that without scintillator. Luminescence mechanisms including self-trapped exciton, energy transfer, and impact excitation are proposed for the dramatic RL improvement. It is expected that such a new and robust scintillator will open a window for the fields of NBs and radiography.

Structure design and performance of photomultiplication-type organic photodetectors based on an aggregation-induced emission material

Nanoscale ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 2648-2656 ◽  
Author(s):  
Dechao Guo ◽  
Zeng Xu ◽  
Dezhi Yang ◽  
Dongge Ma ◽  
Benzhong Tang ◽  
...  
Keyword(s):  
High Performance ◽  
Structure Design ◽  
Device Structure ◽  
Aggregation Induced Emission ◽  
And Performance ◽  
Organic Photodetectors

High performance photomultiplication-type organic photodetectors based on an AIE material were successfully fabricated by designing a device structure.

Highly Efficient Copper Halide Scintillators for High-Performance and Dynamic X-ray Imaging

Nanoscale ◽  
2021 ◽  
Author(s):  
Quan Zhou ◽  
Jiwei Ren ◽  
Jiawen Xiao ◽  
Lin Lei ◽  
Feiyi Liao ◽  
...  
Keyword(s):  
Homeland Security ◽  
High Performance ◽  
Low Cost ◽  
Light Yield ◽  
Medical Diagnostics ◽  
Dynamic Imaging ◽  
Copper Halide ◽  
X Ray ◽  
X Ray Imaging ◽  
High Light Yield

Progress towards high performance X-ray detection and dynamic imaging applications, including nondestructive inspection, homeland security, and medical diagnostics, requires scintillators with high light yield, reasonable decay time, low cost, and...

Efficient Instruction and Data Caching for High Performance Embedded Processors

1970 ◽  
pp. 9
Author(s):  
A. Ferrerón Labari ◽  
D. Suárez Gracia ◽  
V. Viñals Yúfera
Keyword(s):  
Embedded Systems ◽  
Power Consumption ◽  
Low Power ◽  
Interconnection Networks ◽  
High Performance ◽  
Critical Issue ◽  
Content Management ◽  
Structure Design ◽  
Portable Devices ◽  
On Chip

In the last years, embedded systems have evolved so that they offer capabilities we could only find before in high performance systems. Portable devices already have multiprocessors on-chip (such as PowerPC 476FP or ARM Cortex A9 MP), usually multi-threaded, and a powerful multi-level cache memory hierarchy on-chip. As most of these systems are battery-powered, the power consumption becomes a critical issue. Achieving high performance and low power consumption is a high complexity challenge where some proposals have been already made. Suarez et al. proposed a new cache hierarchy on-chip, the LP-NUCA (Low Power NUCA), which is able to reduce the access latency taking advantage of NUCA (Non-Uniform Cache Architectures) properties. The key points are decoupling the functionality, and utilizing three specialized networks on-chip. This structure has been proved to be efficient for data hierarchies, achieving a good performance and reducing the energy consumption. On the other hand, instruction caches have different requirements and characteristics than data caches, contradicting the low-power embedded systems requirements, especially in SMT (simultaneous multi-threading) environments. We want to study the benefits of utilizing small tiled caches for the instruction hierarchy, so we propose a new design, ID-LP-NUCAs. Thus, we need to re-evaluate completely our previous design in terms of structure design, interconnection networks (including topologies, flow control and routing), content management (with special interest in hardware/software content allocation policies), and structure sharing. In CMP environments (chip multiprocessors) with parallel workloads, coherence plays an important role, and must be taken into consideration.

scholarly journals High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhenrong Jia ◽  
Shucheng Qin ◽  
Lei Meng ◽  
Qing Ma ◽  
Indunil Angunawela ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Short Circuit ◽  
Power Conversion ◽  
High Power Conversion Efficiency ◽  
Device Structure ◽  
Narrow Bandgap

AbstractTandem organic solar cells are based on the device structure monolithically connecting two solar cells to broaden overall absorption spectrum and utilize the photon energy more efficiently. Herein, we demonstrate a simple strategy of inserting a double bond between the central core and end groups of the small molecule acceptor Y6 to extend its conjugation length and absorption range. As a result, a new narrow bandgap acceptor BTPV-4F was synthesized with an optical bandgap of 1.21 eV. The single-junction devices based on BTPV-4F as acceptor achieved a power conversion efficiency of over 13.4% with a high short-circuit current density of 28.9 mA cm−2. With adopting BTPV-4F as the rear cell acceptor material, the resulting tandem devices reached a high power conversion efficiency of over 16.4% with good photostability. The results indicate that BTPV-4F is an efficient infrared-absorbing narrow bandgap acceptor and has great potential to be applied into tandem organic solar cells.

scholarly journals Lateral PbS Photovoltaic Devices for High Performance Infrared and Terahertz Photodetectors

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1692
Author(s):  
Emmanuel K. Ampadu ◽  
Jungdong Kim ◽  
Eunsoon Oh
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Photovoltaic Device ◽  
Photovoltaic Devices ◽  
Temperature Spectrum ◽  
Terahertz Region ◽  
Room Temperature Spectrum ◽  
Ftir Spectrometer ◽  
Titanium Substrates ◽  
Deposition Conditions

We fabricated a lateral photovoltaic device for use as infrared to terahertz (THz) detectors by chemically depositing PbS films on titanium substrates. We discussed the material properties of PbS films grown on glass with varying deposition conditions. PbS was deposited on Ti substrates and by taking advantage of the Ti/PbS Schottky junction, we discussed the photocurrent transients as well as the room temperature spectrum response measured by Fourier transform infrared (FTIR) spectrometer. Our photovoltaic PbS device operates at room temperature for wavelength ranges up to 50 µm, which is in the terahertz region, making the device highly applicable in many fields.

Performance Boost Using a New Device Structure Design for SOI MOSFETs Beyond 25nm Node

2019 ◽  
Vol 11 (6) ◽  
pp. 349-355 ◽  
Author(s):  
Weitao Cheng ◽  
Akinobu Teramoto ◽  
Tadahiro Ohmi
Keyword(s):  
Structure Design ◽  
Device Structure ◽  
New Device

Two-Dimensional InSb/GaAs- and InSb/InP-based Tandem Photovoltaic Device with Matched Bandgap

Nanoscale ◽  
2022 ◽  
Author(s):  
Meiqiu Xie ◽  
Xuhai Liu ◽  
Yang Li ◽  
Xing'ao Li
Keyword(s):  
High Performance ◽  
Fossil Fuels ◽  
Photovoltaic Device ◽  
Energy Crisis ◽  
Two Dimensional ◽  
The Past

The past several years have witnessed remarkable research efforts to develop high-performance photovoltaics (PVs), to curtail energy crisis by avoiding dependence on traditional fossil fuels. In this regard, it is...

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