IEC 62899-203-2:2025

Overview

IEC 62899-203-2:2025 - Printed electronics: Semiconductor ink - Space charge limited mobility measurement in printed organic semiconductive layers specifies a standardized test method to determine the effective charge carrier mobility of printed organic semiconductive layers using the space charge limited current (SCLC) technique. Designed as a reproducible benchmark at a specified temperature for planar devices, the standard defines sample and equipment requirements, the measurement procedure, data-analysis protocol and reporting format to enable consistent comparison between materials, formulations and fabrication processes.

Key topics and requirements

• Scope and limitations
  • Intended for unipolar devices (hole-only or electron-only) with efficient charge injection and where series resistance does not dominate the I–V curve.
  • Not suitable for devices with problematic electron injection, highly doped materials (no SCLC regime), or applications requiring lateral transport (e.g., transistors).
• Sample and DUT requirements
  • Geometry and active area definitions for planar sandwich structures (thin semiconductive layer between parallel electrodes).
• Test equipment and measurement
  • Protocol for stepwise voltage sweeps, current settling time, and temperature control to measure the I–V curve for SCLC analysis.
• Data analysis and corrections
  • Procedures for series resistance checks, compensation for built‑in voltage, selection of valid data ranges, and least-squares fitting to extract the effective mobility.
  • Recording of fit parameters, mobility values at specified electric fields, and fit images for traceability.
• Reporting
  • A standardized reporting template and example (Annex A) to ensure reproducible, comparable results across labs.

Applications and users

• Materials R&D teams benchmarking semiconductor inks and printed organic semiconductive layers.
• Ink formulators and manufacturers evaluating formulation changes and process impacts on charge carrier mobility.
• Test laboratories and QA departments performing mobility measurements for product specification and supplier comparison.
• Academic and industrial researchers studying transport properties in printed electronics using the SCLC mobility technique.

Practical value

• Provides a reproducible, widely applicable benchmark for mobility in printed devices, improving comparability across vendors and publications.
• Reduces variability introduced by differing measurement practices and data-analysis methods, enabling better material selection for OLEDs, OPVs and other printed electronic components where vertical transport dominates.

Related standards

• IEC 62899-203 (Printed electronics - Part 203: Materials - Semiconductor ink)
• Other parts of the IEC 62899 series: IEC 62899-201 (Substrates), IEC 62899-202 (Conductive ink), IEC 62899-204 (Insulator ink)

Keywords: IEC 62899-203-2:2025, printed electronics, semiconductor ink, SCLC, space charge limited current, charge carrier mobility, mobility measurement, printed organic semiconductive layers.