The Spi-Cell Tester™ tests the electrical performance of photovoltaic cells under simulated sunlight. A xenon arc lamp with an optical filter provides a close match to the Air Mass 1.5 Global (AM1.5G) solar spectrum.
The Spi-Cell Tester measures current-voltage (I-V) characteristics of cells with dimensions up to 156 mm x 156 mm at 1 sun intensity. Its high resolution also permits testing of very small area devices. Separate current and voltage probes on the top and bottom of the cell permit four-point (Kelvin) I-V measurements. A calibrated monitor cell is located on the test plane to monitor the light intensity.
A computer with user friendly software adjusts the lamp intensity, controls the measurement process, and acquires cell performance data. A programmable electronic load varies the resistance across the cell to measure its I-V characteristics. The computer plots the I-V curve and displays a variety of cell characteristics. Curves and data can be printed and stored on disk.