Energy data acquisition system I-V

voltagewith photovoltaic panelresistance

There are many types of photovoltaic elements. The main applications are light-emitting diodes, solar cells, photo detectors, and so on. The device characteristics have a great correlation with its current-voltage curve. From single pn junction to mutt junctions, from homo- junction to heterojunction, from surface microstructures to nanostructure design of active layer, each case has different current-vollage curve characteristics. Measurement of IV curve under solar simidator can help to obtain the energy conversion efficiency and related characteristics such as open circuit voltage (Voc), short crcuit current (Isc), ideality factor (FF), serie resistance (Rs), and shunt resistance (Rsh). Feature Hardware - Source meter of Keithley 24XX series, Keithley 26XX series, Agilient B29XX series Measurement items - Light IV / dark IV - Adjustable scan for specific voltage step, time step, compliance voltage / current, volatge / current measured range, step numbers and polarity - Forward and reverse scan - Multi measurements with specific time period - m2-wire and 4-wire measurement - Stability measurement curve over time @ constant voltage/current (voltage vs time or current vs time) - 4-wire resistance measurement (sheet resistance) - Temperature measurement of LiveStrong’s reference solar cell - Shutter control of solar simulator (option) - Multi channels measurement of solar cells or devices Analysis - IV curve measurement: To calculate solar cell parameters including Voc, Isc, Jsc, Vmax, Im-ax, Pmax, Fill Factor (FF), Efficiency, Re, Reh - Stability measurement: To calculate the max, min, average, standard deviation, of voltage / current