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Related Concept Videos

Photoelectric Effect02:26

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

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Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors
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Contact-type line image sensor using Pb(2)CrO(5) thin film.

S Yoshida, K Toda

    Applied Optics
    |June 22, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel contact-type line image sensor utilizing lead chromate thin films. The sensor achieves a fast 1 ms/line scanning rate, demonstrating potential for high-speed image reading applications.

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    Area of Science:

    • Materials Science
    • Optoelectronics
    • Sensor Technology

    Background:

    • Development of advanced imaging sensors is crucial for various applications.
    • Thin-film deposition techniques offer pathways to novel sensor structures.
    • Lead chromate (Pb(2)CrO(5)) presents unique optoelectronic properties.

    Purpose of the Study:

    • To develop and characterize a contact-type line image sensor.
    • To investigate the performance of semi-insulating Pb(2)CrO(5) thin films in sensor applications.
    • To demonstrate the feasibility of high-speed image reading with the developed sensor.

    Main Methods:

    • Fabrication of a semi-insulating Pb(2)CrO(5) thin film on a glass substrate using electron beam evaporation.
    • Construction of a contact-type line image sensor with a simple structure.
    • Implementation of a matrix driving method with a simple reading circuit for sensor operation.
    • Testing the sensor's response to modulated light and demonstrating image reading capabilities.

    Main Results:

    • The sensor exhibits a simple structure and a high scanning rate of 1 ms/line.
    • Individual sensor elements respond to light modulated at 100 kHz, indicating potential for even higher scanning rates.
    • A 32-element sensor operated at 8 elements/mm using the matrix driving method.
    • Successful demonstration of practical image reading using the developed sensor.

    Conclusions:

    • Semi-insulating Pb(2)CrO(5) thin films are suitable for fabricating contact-type line image sensors.
    • The developed sensor achieves a high scanning rate and demonstrates practical image reading capabilities.
    • The simple structure and matrix driving method offer a cost-effective approach for high-speed imaging.