Graphene-Ta2O5 Heterostructure Enabled High Performance, Deep-Ultraviolet to Mid-Infrared Photodetection

Nanoscale ◽  
2021 ◽  
Author(s):  
Vinh Ho ◽  
Yifei Wang ◽  
Michael Cooney ◽  
Nguyen Q Vinh
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Low Cost ◽  
Infrared Region ◽  
Temperature Sensitive ◽  
Mid Infrared ◽  
Significant Challenge ◽  
Deep Ultraviolet ◽  
Infrared Photodetection

Ultrafast, high sensitive, low cost photodetectors operating at room temperature sensitive from the deep-ultraviolet to mid-infrared region remain a significant challenge in optoelectronics. Achievements in traditional semiconductors using cryogenic operation...

scholarly journals Room-Temperature Solution-Processed 0D/1D Bilayer Electrodes for Translucent CsPbBr3 Perovskite Photovoltaics

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1489
Author(s):  
Bhaskar Parida ◽  
Saemon Yoon ◽  
Dong-Won Kang
Keyword(s):  
Solar Cells ◽  
Indium Tin Oxide ◽  
High Performance ◽  
Room Temperature ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Ambient Air ◽  
Plasma Damage ◽  
Temperature Solution ◽  
Ito Nanoparticles

Materials and processing of transparent electrodes (TEs) are key factors to creating high-performance translucent perovskite solar cells. To date, sputtered indium tin oxide (ITO) has been a general option for a rear TE of translucent solar cells. However, it requires a rather high cost due to vacuum process and also typically causes plasma damage to the underlying layer. Therefore, we introduced TE based on ITO nanoparticles (ITO-NPs) by solution processing in ambient air without any heat treatment. As it reveals insufficient conductivity, Ag nanowires (Ag-NWs) are additionally coated. The ITO-NPs/Ag-NW (0D/1D) bilayer TE exhibits a better figure of merit than sputtered ITO. After constructing CsPbBr3 perovskite solar cells, the device with 0D/1D TE offers similar average visible transmission with the cells with sputtered ITO. More interestingly, the power conversion efficiency of 0D/1D TE device was 5.64%, which outperforms the cell (4.14%) made with sputtered-ITO. These impressive findings could open up a new pathway for the development of low-cost, translucent solar cells with quick processing under ambient air at room temperature.

Highly Sensitive, Gate-Tunable, Room-Temperature Mid-Infrared Photodetection Based on Graphene–Bi2Se3 Heterostructure

ACS Photonics ◽  
2017 ◽  
Vol 4 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Jaeseok Kim ◽  
Sungjoon Park ◽  
Houk Jang ◽  
Nikesh Koirala ◽  
Jae-Bok Lee ◽  
...  
Keyword(s):  
Room Temperature ◽  
Mid Infrared ◽  
Highly Sensitive ◽  
Infrared Photodetection

The Optimization of Extraction of Cordycepin from Fruiting Body of Cordyceps militaris (L.) Link

2011 ◽  
Vol 393-395 ◽  
pp. 1024-1028 ◽  
Author(s):  
Hong Zhang ◽  
Jun Wei Wang ◽  
Sheng Zhong Dong ◽  
Fang Xu Xu ◽  
Sheng Hou Wang
Keyword(s):  
Fruiting Body ◽  
High Performance ◽  
Room Temperature ◽  
Low Cost ◽  
Cordyceps Militaris ◽  
Ultrasonic Extraction ◽  
Water Extraction ◽  
Synergistic Extraction ◽  
Control Group ◽  
Low Loss

The optimization of extraction of cordycepin from fruiting body of Cordyceps militaris YCC-01 by water extraction, ethanol extraction, ultrasonic extraction, and synergistic extraction is studied in this paper. The optimal conditions, water extraction at 85°C for 2.5h plus ultrasonic extraction at 600W for 35min, were determined through high performance liquid chromatography (HPLC). The dried fruiting body of cordycepin content was 9.559 mg/g by this synergistic extraction method. The yield was 66.2% higher than the control group 85°C water extraction 2.5h and 11.3% higher than the room temperature ultrasonic extraction 35min. This method has a short extraction time, low cost, low loss of active ingredients and other characteristics with good prospects.

High-performance mid-infrared photodetection based on Bi2Se3 maze and free-standing nanoplates

2020 ◽  
Vol 32 (10) ◽  
pp. 105705
Author(s):  
Shi Luo ◽  
JiaLu Li ◽  
Tai Sun ◽  
Xiangzhi Liu ◽  
Dacheng Wei ◽  
...  
Keyword(s):  
High Performance ◽  
Free Standing ◽  
Mid Infrared ◽  
Infrared Photodetection

scholarly journals Narrow bandgap oxide nanoparticles coupled with graphene for high performance mid-infrared photodetection

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Xuechao Yu ◽  
Yangyang Li ◽  
Xiaonan Hu ◽  
Daliang Zhang ◽  
Ye Tao ◽  
...  
Keyword(s):  
High Performance ◽  
Oxide Nanoparticles ◽  
Mid Infrared ◽  
Narrow Bandgap ◽  
Infrared Photodetection

scholarly journals High-Performance Mg3Sb2-xBix Thermoelectrics: Progress and Perspective

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-22 ◽  
Author(s):  
Airan Li ◽  
Chenguang Fu ◽  
Xinbing Zhao ◽  
Tiejun Zhu
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Low Cost ◽  
Successful Implementation ◽  
Low Grade ◽  
Structure Property ◽  
Promising Alternative ◽  
Band Engineering ◽  
Device Applications ◽  
Boundary Modification

Since the first successful implementation of n-type doping, low-cost Mg3Sb2-xBix alloys have been rapidly developed as excellent thermoelectric materials in recent years. An average figure of merit zT above unity over the temperature range 300–700 K makes this new system become a promising alternative to the commercially used n-type Bi2Te3-xSex alloys for either refrigeration or low-grade heat power generation near room temperature. In this review, with the structure-property-application relationship as the mainline, we first discuss how the crystallographic, electronic, and phononic structures lay the foundation of the high thermoelectric performance. Then, optimization strategies, including the physical aspects of band engineering with Sb/Bi alloying and carrier scattering mechanism with grain boundary modification and the chemical aspects of Mg defects and aliovalent doping, are extensively reviewed. Mainstream directions targeting the improvement of zT near room temperature are outlined. Finally, device applications and related engineering issues are discussed. We hope this review could help to promote the understanding and future developments of low-cost Mg3Sb2-xBix alloys for practical thermoelectric applications.

scholarly journals Broadband infrared photodetection using a narrow bandgap conjugated polymer

2021 ◽  
Vol 7 (24) ◽  
pp. eabg2418
Author(s):  
Jarrett H. Vella ◽  
Lifeng Huang ◽  
Naresh Eedugurala ◽  
Kevin S. Mayer ◽  
Tse Nga Ng ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
High Performance ◽  
Low Cost ◽  
Modern Science ◽  
Long Wavelength ◽  
Narrow Bandgap ◽  
Wavelength Absorption ◽  
Donor Acceptor ◽  
Infrared Photodetection ◽  
Bandgap Semiconductors

Photodetection spanning the short-, mid-, and long-wave infrared (SWIR-LWIR) underpins modern science and technology. Devices using state-of-the-art narrow bandgap semiconductors require complex manufacturing, high costs, and cooling requirements that remain prohibitive for many applications. We report high-performance infrared photodetection from a donor-acceptor conjugated polymer with broadband SWIR-LWIR operation. Electronic correlations within the π-conjugated backbone promote a high-spin ground state, narrow bandgap, long-wavelength absorption, and intrinsic electrical conductivity. These previously unobserved attributes enabled the fabrication of a thin-film photoconductive detector from solution, which demonstrates specific detectivities greater than 2.10 × 109 Jones. These room temperature detectivities closely approach those of cooled epitaxial devices. This work provides a fundamentally new platform for broadly applicable, low-cost, ambient temperature infrared optoelectronics.

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