Photovoltaic devices - Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method

This technical specification establishes a standardized methodology for evaluating the temperature characteristics of optoelectronic components using the open-circuit voltage technique. The procedure provides a systematic approach to determine how thermal variations affect the performance and operational stability of such devices under specific test conditions. By defining precise measurement protocols and environmental requirements, the document ensures consistency in experimental results across different laboratories and manufacturing settings. It outlines the necessary apparatus configuration, including voltage measurement instruments and temperature control systems, while specifying data processing rules to derive accurate thermal parameters. The guidelines are designed to support quality control processes and facilitate technical communication within the industry regarding device performance under thermal stress. This framework aids engineers and researchers in characterizing components by linking electrical output directly to temperature changes, thereby contributing to more reliable product development and testing workflows without implying any specific regulatory enforcement or comparative merit.