Overview
IEC 60747-5-10:2019 is an international standard published by the International Electrotechnical Commission (IEC) that specifies a test method for measuring the internal quantum efficiency (IQE) of single light emitting diode (LED) chips or packages without phosphor. This standard focuses on a room-temperature measurement method, known as the room-temperature reference-point method (RTRM), and applies exclusively to non-phosphor LEDs. White LEDs used in general lighting are outside the scope of this document.
By detailing procedures for determining IQE via relative external quantum efficiency (EQE) at an operating temperature, IEC 60747-5-10:2019 enables consistent, repeatable measurements that are crucial for LED performance evaluation and comparison.
Key Topics
- Internal Quantum Efficiency (IQE): Defines IQE as the ratio of photons emitted from the active region to electrons injected, establishing clear terminology and measurement requirements.
- Relative External Quantum Efficiency (EQE): Utilizes the relative EQE measured at room temperature as the basis for IQE calculations.
- Room-Temperature Reference-Point Method (RTRM): Specifies how to find an operating current corresponding to 100% injection efficiency and determine the reference IQE by analyzing infinitesimal changes in relative EQE.
- Normalized Variables & Measurement Sequence: Describes the computation of normalized current and radiant power, determination of reference point, and sequential measurement steps.
- Environmental & Test Conditions: Outlines requirements for temperature, humidity, and measurement setup to ensure accuracy and reproducibility.
Applications
IEC 60747-5-10:2019 provides practical guidance for:
- LED Manufacturers: Enables reliable and standardized assessment of IQE for development, quality control, and specification of non-phosphor LED devices.
- Testing Laboratories: Assists in setting up test procedures and environmental conditions, promoting consistency between results from different facilities.
- R&D and Academic Research: Offers a robust, reference method for investigating device physics and improving LED designs by accurately measuring internal efficiency.
- Quality Assurance: Facilitates effective comparison of devices and fosters transparency in performance data across the LED supply chain.
The standard is especially relevant for advanced optoelectronic and semiconductor device testing, supporting innovation and performance benchmarking in the LED industry.
Related Standards
IEC 60747-5-10:2019 draws on and complements several key standards:
- IEC 60747-5-6:2016: Details optoelectronic LED device characterization and measuring instruments referenced throughout IEC 60747-5-10.
- IEC 60747-5-8:2019: Concerns the test method of optoelectronic efficiencies of LEDs, providing additional context for efficiency measurements.
- IEC 60747 Series: A broad set of international standards defining characteristics and measurement procedures for semiconductor devices.
Users should also consult related documentation on quantum efficiency, optoelectronic measurement, and LED testing procedures for a comprehensive approach to device evaluation.
By adhering to IEC 60747-5-10:2019, organizations ensure consistent, internationally recognized testing methods for LED IQE, advancing semiconductor device quality and performance worldwide. For further detail, refer to the IEC Webstore or contact your national committee.
Open preview (PDF)Semiconductor devices - Part 5-10: Optoelectronic devices - Light emitting diodes - Test method of the internal quantum efficiency based on the room-temperature reference point
