Organic photodetectors with frustrated charge transport for small-pitch image sensors

2019 ◽  
Vol 126 (4) ◽  
pp. 045501
Author(s):  
Z. Ma ◽  
C. K. Renshaw
Keyword(s):  
Charge Transport ◽  
Image Sensors ◽  
Small Pitch ◽  
Organic Photodetectors

Spray-Coated Organic Photodetectors and Image Sensors with Silicon-Like Performance

2018 ◽  
Vol 4 (1) ◽  
pp. 1800158 ◽  
Author(s):  
Markus Biele ◽  
Cindy Montenegro Benavides ◽  
Judith Hürdler ◽  
Sandro F. Tedde ◽  
Christoph J. Brabec ◽  
...  
Keyword(s):  
Image Sensors ◽  
Organic Photodetectors

scholarly journals Organic Photodetectors and their Application in Large Area and Flexible Image Sensors: The Role of Dark Current

2019 ◽  
Vol 30 (20) ◽  
pp. 1904205 ◽  
Author(s):  
Giulio Simone ◽  
Matthew J. Dyson ◽  
Stefan C. J. Meskers ◽  
René A. J. Janssen ◽  
Gerwin H. Gelinck
Keyword(s):  
Dark Current ◽  
Image Sensors ◽  
Large Area ◽  
Organic Photodetectors

scholarly journals Carrier Blocking Layer Materials and Application in Organic Photodetectors

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1404
Author(s):  
Yi Li ◽  
Hu Chen ◽  
Jianhua Zhang
Keyword(s):  
High Performance ◽  
Spectral Response ◽  
Critical Role ◽  
Cost Effective ◽  
Image Sensors ◽  
Large Area ◽  
Solution Processes ◽  
Response Range ◽  
Long Time ◽  
Organic Photodetectors

As a promising candidate for next-generation photodetectors, organic photodetectors (OPDs) have gained increasing interest as they offer cost-effective fabrication methods using solution processes and a tunable spectral response range, making them particularly attractive for large area image sensors on lightweight flexible substrates. Carrier blocking layers engineering is very important to the high performance of OPDs that can select a certain charge carriers (holes or electrons) to be collected and suppress another carrier. Carrier blocking layers of OPDs play a critical role in reducing dark current, boosting their efficiency and long-time stability. This Review summarizes various materials for carrier blocking layers and some of the latest progress in OPDs. This provides the reader with guidelines to improve the OPD performance via carrier blocking layers engineering.

Large-gain low-voltage and wideband organic photodetectors via unbalanced charge transport

2020 ◽  
Vol 7 (12) ◽  
pp. 3234-3241
Author(s):  
Jianfei Huang ◽  
Jaewon Lee ◽  
Max Schrock ◽  
Alana L. Dixon ◽  
Alexander T. Lill ◽  
...  
Keyword(s):  
Charge Transport ◽  
Low Voltage ◽  
Bulk Heterojunction ◽  
Photoconductive Gain ◽  
Highly Efficient ◽  
Large Gain ◽  
Organic Photodetectors

Tetracyanoquinodimethane leads to trap-enhanced photoconductive gain and highly efficient broadband sensing for bulk heterojunction organic photodetectors.

Object Detection Using an Ideal Observer Model

2020 ◽  
Vol 2020 (16) ◽  
pp. 41-1-41-7
Author(s):  
Orit Skorka ◽  
Paul J. Kane
Keyword(s):  
Object Detection ◽  
Matched Filter ◽  
Image Sensors ◽  
Ideal Observer ◽  
Noise Power ◽  
Relative Evaluation ◽  
Detection And Identification ◽  
Cross Correlation Analysis ◽  
Observer Model ◽  
The Ideal

Many of the metrics developed for informational imaging are useful in automotive imaging, since many of the tasks – for example, object detection and identification – are similar. This work discusses sensor characterization parameters for the Ideal Observer SNR model, and elaborates on the noise power spectrum. It presents cross-correlation analysis results for matched-filter detection of a tribar pattern in sets of resolution target images that were captured with three image sensors over a range of illumination levels. Lastly, the work compares the crosscorrelation data to predictions made by the Ideal Observer Model and demonstrates good agreement between the two methods on relative evaluation of detection capabilities.

Magnetic Ordering via Itinerant Ferromagnetism in a Metal-Organic Framework

2020 ◽  
Author(s):  
Jesse Park ◽  
Brianna Collins ◽  
Lucy Darago ◽  
Tomce Runcevski ◽  
Michael Aubrey ◽  
...  
Keyword(s):  
Charge Transport ◽  
Magnetic Order ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Magnetic Ordering ◽  
Double Exchange ◽  
Itinerant Ferromagnetism ◽  
Organic Solids ◽  
Metal Organic ◽  
Organic Framework

<b>Materials that combine magnetic order with other desirable physical attributes offer to revolutionize our energy landscape. Indeed, such materials could find transformative applications in spintronics, quantum sensing, low-density magnets, and gas separations. As a result, efforts to design multifunctional magnetic materials have recently moved beyond traditional solid-state materials to metal–organic solids. Among these, metal–organic frameworks in particular bear structures that offer intrinsic porosity, vast chemical and structural programmability, and tunability of electronic properties. Nevertheless, magnetic order within metal–organic frameworks has generally been limited to low temperatures, owing largely to challenges in creating strong magnetic exchange in extended metal–organic solids. Here, we employ the phenomenon of itinerant ferromagnetism to realize magnetic ordering at <i>T</i><sub>C</sub> = 225 K in a mixed-valence chromium(II/III) triazolate compound, representing the highest ferromagnetic ordering temperature yet observed in a metal–organic framework. The itinerant ferromagnetism is shown to proceed via a double-exchange mechanism, the first such observation in any metal–organic material. Critically, this mechanism results in variable-temperature conductivity with barrierless charge transport below <i>T</i><sub>C</sub> and a large negative magnetoresistance of 23% at 5 K. These observations suggest applications for double-exchange-based coordination solids in the emergent fields of magnetoelectrics and spintronics. Taken together, the insights gleaned from these results are expected to provide a blueprint for the design and synthesis of porous materials with synergistic high-temperature magnetic and charge transport properties. </b>

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