Solar Cell Inspection Using Pulsed Light and Temperature Control
Solution Overview
Problem
Existing photoelectric device inspection techniques fail to accurately assess temperature-dependent characteristics, which are crucial due to thermal influences on semiconductor devices, leading to variability in device performance.
Innovation Solution
An inspection apparatus that uses pulsed light to generate terahertz waves from photoelectric devices, includes a temperature control system to maintain specified temperatures, and corrects detected wave intensities based on temperature correlation information, enabling precise inspection of temperature-dependent characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature control is not implemented during inspection, then the inspection process is simple and fast, but the measurement precision of temperature-dependent characteristics deteriorates
Solution Approach 1:
The temperature control is activated before the inspection process begins, and the photoelectric device is pre-heated to the target temperature. This preliminary temperature stabilization ensures that the inspection is performed under controlled temperature conditions, improving measurement precision without requiring continuous complex temperature management during the actual inspection.
Solution Approach 2:
The inspection system dynamically adjusts the temperature parameter of the photoelectric device during inspection by controlling the heating lamp. The temperature control unit modifies heating power based on feedback from the temperature sensor, maintaining the desired temperature parameter and enabling accurate inspection of temperature-dependent characteristics.
2Measurement precision
If temperature control is implemented during inspection, then the measurement precision of temperature-dependent characteristics improves, but the inspection time increases
Solution Approach 1:
The temperature control unit activates the heating lamp before inspection begins and maintains temperature during the process. By preparing the temperature environment in advance and maintaining it continuously, the system achieves accurate temperature-dependent inspection without requiring repeated heating cycles, thus minimizing total inspection time while ensuring measurement precision.
Solution Approach 2:
The heating lamp operates continuously during the inspection process to maintain stable temperature conditions. This continuous temperature maintenance ensures that the photoelectric device remains at the target temperature throughout the inspection, eliminating interruptions and reducing total inspection time while preserving measurement accuracy.
3Measurement precision
If temperature correlation information is used for correction, then the inspection accuracy improves, but the data processing complexity increases
Solution Approach 1:
The temperature control unit uses feedback from the temperature sensor to continuously monitor and adjust the heating power. Similarly, the inspection results are corrected using feedback from temperature correlation information. This feedback mechanism enables automatic compensation for temperature variations, improving inspection accuracy while keeping the processing logic systematic and manageable.
Solution Approach 2:
The inspection results are dynamically adjusted based on temperature correlation parameters. By applying correction factors derived from temperature-dependent calibration data, the system compensates for temperature effects on measurement accuracy. This parameter-based correction approach maintains high inspection accuracy while using straightforward mathematical adjustments rather than complex processing algorithms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise inspection of photoelectric device characteristics by accounting for temperature fluctuations, improving the accuracy of evaluating device performance under various temperature conditions.
Implementation Method 1
pulsed light irradiation part for irradiating the photoelectric device with pulsed light to cause the photoelectric device to radiate an electromagnetic wave, which is a terahertz wave
Implementation Method 2
temperature changing part for changing a temperature of the photoelectric device at a part irradiated with the pulsed light to be maintained at a specified temperature
Data Source
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AI summary
An inspection apparatus 100 is an apparatus for inspecting a solar cell panel 90. The inspection apparatus 100 includes: an excitation light irradiation part 12 for irradiating the solar cell panel 90 with pulsed light LP11 for causing the solar cell panel 90 to radiate an electromagnetic wave pulse LT1; a detection part 13 for detecting the electromagnetic wave pulse LT1 radiated from the solar cell panel 90 in response to irradiation with the pulsed light LP11; and a temperature changing part 31 for changing a temperature of the solar cell panel 90 at a part irradiated with the pulsed light LP11.