Spi-Cell Tester™ One-Sun Solar Cell Tester he 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. Measures one-sun cells Probes and temperature controlled vacuum chuck (with optional third bus bar contact) F E AT U R E S A N D B E N E F I T S Measures and displays the following cell parameters: - Complete I-V curve - Open circuit voltage, Voc - Short-circuit current, Isc - Cell temperature, °C - Peak power, Pmax - Cell efficiency, η - Fill factor, FF - Series resistance, Rs - Shunt resistance, Rsh Illumination uniformity within ±2% at 1 sun Xenon light source filtered to Class A spectrum (AM1.5G) for intensities from 70 to 110 mW/cm² Calibrated monitor cell traceable to NREL Four point probe (Kelvin) for accurate measurements Temperature controlled vacuum chuck using a closed loop water chiller Computer system and software package for operation, measurements, data analysis, printed output, and disk storage w w w.spiresolar.com ©2014 Spire Corporation. All rights reserved. Specifications are subject to change without notice.