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  • Physics  (3)
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  • Physics  (3)
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  • 1
    Online Resource
    Online Resource
    A Fully Solution‐Printed Photosynaptic Transistor Array with Ultralow Energy Consumption for Artificial‐Vision Neural Networks
    Wiley ; 2022
    In:  Advanced Materials Vol. 34, No. 18 ( 2022-05)
    Details
    In: Advanced Materials, Wiley, Vol. 34, No. 18 ( 2022-05)
    Abstract: Photosynaptic organic field‐effect transistors (OFETs) represent a viable pathway to develop bionic optoelectronics. However, the high operating voltage and current of traditional photosynaptic OFETs lead to huge energy consumption greater than that of the real biological synapses, hindering their further development in new‐generation visual prosthetics and artificial perception systems. Here, a fully solution‐printed photosynaptic OFET (FSP‐OFET) with substantial energy consumption reduction is reported, where a source Schottky barrier is introduced to regulate charge‐carrier injection, and which operates with a fundamentally different mechanism from traditional devices. The FSP‐OFET not only significantly lowers the working voltage and current but also provides extraordinary neuromorphic light‐perception capabilities. Consequently, the FSP‐OFET successfully emulates visual nervous responses to external light stimuli with ultralow energy consumption of 0.07–34 fJ per spike in short‐term plasticity and 0.41–19.87 fJ per spike in long‐term plasticity, both approaching the energy efficiency of biological synapses (1–100 fJ). Moreover, an artificial optic‐neural network made from an 8 × 8 FSP‐OFET array on a flexible substrate shows excellent image recognition and reinforcement abilities at a low energy cost. The designed FSP‐OFET offers an opportunity to realize photonic neuromorphic functionality with extremely low energy consumption dissipation.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v34.18
    DOI: 10.1002/adma.202200380
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1474949-X
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Boosting the Performance of Organic Photodetectors with a Solution‐Processed Integration Circuit toward Ubiquitous Health Monitoring
    Wiley ; 2023
    In:  Advanced Materials Vol. 35, No. 36 ( 2023-09)
    Details
    In: Advanced Materials, Wiley, Vol. 35, No. 36 ( 2023-09)
    Abstract: Organic photodetectors, as an emerging wearable photoplethysmographic (PPG) technology, offer exciting opportunities for next‐generation photonic healthcare electronics. However, the mutual restraints among photoresponse, structure complexity, and fabrication cost have intrinsically limited the development of organic photodetectors for ubiquitous health monitoring in daily activities. Here, an effective route to dramatically boost the performance of organic photodetectors with a solution‐processed integration circuit for health monitoring application is reported. Through creating an ideal metal–semiconductor junction interface that minimizes the trap states within the device, solution‐printed organic field‐effect transistors (OFETs) are achieved with an ultrahigh signal amplification efficiency of 37.1 S A −1 , approaching the theoretical thermionic limit. Consequently, monolithic integration of the OFET with an organic photoconductor enables the remarkable amplification of photoresponse signal‐to‐noise ratio by more than four orders of magnitude from 5.5 to 4.6 × 10 5 , which is able to meet the demand for accurately extracting physiological information from the PPG waveforms. This work offers an effective and versatile approach to greatly enhance the photodetector performance, promising to revolutionize health monitoring technologies.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v35.36
    DOI: 10.1002/adma.202301020
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1474949-X
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Water‐Surface Drag Coating: A New Route Toward High‐Quality Conjugated Small‐Molecule Thin Films with Enhanced Charge Transport Properties
    Wiley ; 2021
    In:  Advanced Materials Vol. 33, No. 5 ( 2021-02)
    Details
    In: Advanced Materials, Wiley, Vol. 33, No. 5 ( 2021-02)
    Abstract: Electronic properties of organic semiconductor (OSC) thin films are largely determined by their morphologies and crystallinities. However, solution‐processed conjugated small‐molecule OSC thin films usually exhibit abundant grain boundaries and impure grain orientations because of complex fluid dynamics during solution coating. Here, a novel methodology, water‐surface drag coating, is demonstrated to fabricate high‐quality OSC thin films with greatly enhanced charge transport properties. This method utilizes the water surface to alter the evaporation dynamics of solution to enlarge the grain size, and a unique drag‐coating process to achieve the unidirectional growth of organic crystals. Using 2,8‐difluoro‐5,11‐bis(triethylsilylethynyl)anthradithiophene (Dif‐TES‐ADT) as an example, thin films with millimeter‐sized single‐crystal domains and pure crystallographic orientations are achieved, revealing a significant enhancement (4.7 times) of carrier mobility. More importantly, the resulting film can be directly transferred onto any desired flexible substrates, and flexible transistors based on the Dif‐TES‐ADT thin films show a mobility as high as 16.1 cm 2 V −1 s −1 , which represents the highest mobility value for the flexible transistors reported thus far. The method is general for the growth of various high‐quality OSC thin films, thus opening up opportunities for high‐performance organic flexible electronics.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v33.5
    DOI: 10.1002/adma.202005915
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1474949-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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