An advanced LED-based setup enabling characterization of full-size modules at different temperatures and spectra

Abstract

Standard IV characterization of solar cells and modules is typically performed with Xe-, W- and/or metalhalide-based systems. These are either built around a flash or a steady-state illumination. However, there is a growing trend towards LED-based systems, which allows both flash and steady-state white-light illumination, as well as spectrally-tuned irradiance, broadening the scope of measurements from IV to also include spectral dependencies [1]. In this paper we introduce an advanced LED-based setup for modules and investigate its potential for spectrally-tuned measurements as a function of temperature. While the impact of temperature in measured currents and resulting extraction of accurate EQE requires further fine-tuning of the equipment, some applications with comparative measurements are elaborated to demonstrate the approach and capabilities at its current stage.