研究目的
Investigating the modified spin coating method for coating and fabricating ferroelectric thin films as sensors and solar cells.
研究成果
The modified spin coaters both first and second generation have given very good results on ferroelectric films, which are BST, LiTaO3, LiNbO3, and CuO, as sensors and solar cells. These thin films have been successfully applied in various devices and have potential for more sophisticated applications such as in satellite technology.
研究不足
The brushless motor is only capable of producing the minimum angular velocity of 4000 rpm and the maximum of 18,000 rpm with no load. The spin coater has an average difference of 82.67 rpm compared to the tachometer.
1：Experimental Design and Method Selection:
The study involves the design and development of a modified spin coater for fabricating ferroelectric thin films. The method includes the use of chemical solution deposition (CSD) followed by the spin coating technique.
2：Sample Selection and Data Sources:
Ferroelectric thin films such as barium strontium titanate (BST), lithium niobate (LiNbO3), cuprous oxide (CuO), and lithium tantalate (LiTaO3) are used.
3：List of Experimental Equipment and Materials:
The modified spin coater, substrates, and solutions of thin films are the main materials. The spin coater's components include a current source, step-down transformer, potentiometer, diode, capacitor, and disk spinner.
4：Experimental Procedures and Operational Workflow:
The solution of thin films is dripped on a substrate placed on the spin coater and rotated at desired rpm velocities. The process involves setting the voltage source, selecting output voltage via potentiometer, and using a diode to rectify AC current into DC.
5：Data Analysis Methods:
The electrical and optical properties of the thin films are analyzed, including dielectric constant, electrical conductivity, and energy gap.
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spin coater
portable spin coating-type 2004
Coating and fabricating uniform thin films by rotating substrate and solution of thin films with a certain angular velocity.
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tachometer
DT-2234C+
Measuring the angular velocity of the spin coater.
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Arduino Uno
Arduino
Data processing center for the spin coater.
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brushless motor
Driving component for the spin coater.
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ESC motor driver
Adjusting the angular velocity of the brushless motor.
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LCD
Displaying the magnitude of the angular velocity in rotation per minute (RPM).
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infrared sensor
Detecting colors for the spin coater.
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buzzer
Producing a sound as a notification for the spin coater.
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button
Supporting the functions of the spin coater.
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