prBAS IEC TS 63109:2026

Photovoltaic (PV) modules and cells - Measurement of diode ideality factor by quantitative analysis of electroluminescence images

General information

Status:Project

Number of pages:32

Adoption method:Proglašavanje

Language:engleski

Edition:1.

Realization date:13.11.2025

Forseen date for next stage code:15.01.2026

Technical committee:BAS/TC 56, Conventional and alternative sources of electrical energy

ICS:

27.160, Solar energy engineering

Abstract

IEC TS 63109:2022 specifies a method to measure the diode ideality factor of photovoltaic cells and modules by quantitative analysis of electroluminescence (EL) images. This document provides a definition of the term diode ideality factor n, as the inverse of increment ratio of natural logarithm of current as a function of applied voltage, which is related to the fill factor FF, and is useful as an effective indicator to represent the output efficiency of photovoltaic cells and modules with the other key parameters open circuit voltage Voc and short circuit current Isc.

Lifecycle

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Original document and degree of correspondence

IEC TS 63109:2022, identical

Work material

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