IEC TS 62607-3-5:2026

• Abstract:

  IEC TS 62607-3-5:2026, which is a Technical Specification, establishes a standardized method to determine the optical key control characteristic; • light conversion efficiency; for quantum dot enabled light conversion films (Q-LCFs) by; • luminance meter.; The light conversion efficiency is derived by the photoluminescence spectrum.; The typical application areas of this standardized measurement method are the nano-photoelectric display devices using Q-LCF as key component, and other relevant optical conversion devices.; WARNING – Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.

• Status: Published
• Publication Date: 25-Aug-2026
• ICS: 07.120 - Nanotechnologies
• Technical Committee: TC 113 - Nanotechnology for electrotechnical products and systems
• Drafting Committee: WG 10 - TC 113/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 26-Aug-2026
• Completion Date: 21-Aug-2026

Overview

IEC TS 62607-3-5:2026 is an international technical specification published by the International Electrotechnical Commission (IEC) that establishes a standardized method to evaluate the light conversion efficiency (LCE) of quantum dot enabled light conversion films (Q-LCFs). The method utilizes a luminance meter to derive light conversion efficiency from the photoluminescence spectrum of the material. This standard is vital for manufacturers, suppliers, and users in the nanomanufacturing and display device sectors, ensuring accurate and reproducible measurements for quality assurance and product development.

Quantum dot enabled light conversion films are advanced nanophotonic products commonly used in next-generation display technologies, notably in televisions and other optical conversion devices. The LCE of Q-LCFs directly impacts the color gamut and brightness of these devices, making precise characterization essential for optimized performance and enhanced product differentiation.

Key Topics

• Standardized Measurement of LCE: Describes the use of a luminance meter and specific test conditions to determine the light conversion efficiency based on the photoluminescence spectrum of Q-LCFs.
• Quantum Dot (QD) Fundamentals: Covers key properties of QDs, such as size-dependent emission peaks, quantum confinement effects, and broad absorption spectra, all crucial for industrial light conversion applications.
• Test Environment and Procedure: Specifies conditions for accurate and repeatable testing, including ambient temperature, humidity, pressure, and the use of a standard darkroom with minimal stray light.
• Sample Preparation and Handling: Outlines requirements for Q-LCF samples, emphasizing clean, defect-free surfaces and proper encapsulation of quantum dots to prevent environmental degradation.
• Data Reporting: Details essential data points for the test report, including ambient conditions, photoluminescence wavelengths, FWHM, and calculated LCE, supporting both technical validation and regulatory compliance.

Applications

• Nano-Photoelectric Display Devices: The primary application for this standard is in the manufacture and quality control of displays-such as televisions, monitors, and digital signage-using quantum dot enabled light conversion films to enhance color rendition and luminance.
• Optical Conversion Devices: The measurement process is also applicable to related optical components that leverage quantum dots for wavelength conversion, including light diffusing plates and specialty lighting systems.
• Quality Control and Product Validation: The standardized LCE test enables rapid, meaningful assessment of Q-LCF quality and longevity, helping manufacturers and purchasers ensure component stability, efficient quantum dot performance, and compliance with specification requirements.
• Research and Development: Laboratories and R&D teams use this standard to optimize quantum dot formulations and encapsulation methods, improving barrier properties and advancing the next generation of nanophotonic products.

Related Standards

• ISO/TS 27687:2008 - Nanotechnologies - Terminology and definitions for nano-objects.
• Other IEC 62607 Series Parts - These standards provide further methods for evaluating key control characteristics of nanomanufactured products.
• IEC Electropedia - An essential terminology resource for consistent use of terms in nanotechnology and electrotechnology.

For professionals in the field of nanomanufacturing and display technology, IEC TS 62607-3-5:2026 delivers a foundation for consistent, reliable measurement of quantum dot product performance, supporting the effective adoption and advancement of quantum dot technologies in the global marketplace.

For more on this and other related IEC standards, consult the IEC webstore or your national standards body.

IEC TS 62607-3-5 ®
Edition 1.0 2026-08
TECHNICAL
SPECIFICATION
Nanomanufacturing - Key control characteristics -
Part 3-5: Nanophotonic products - Light conversion efficiency of quantum dot
enabled light conversion films: luminance meter
ICS 07.120  ISBN 978-2-8327-1401-0

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CONTENTS
FOREWORD . 2
INTRODUCTION . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and abbreviated terms . 5
3.1 Terms and definitions . 5
3.2 Abbreviated terms. 6
4 General . 6
4.1 Ambient conditions for measurement . 6
4.2 Standard darkroom conditions for LCE test. 6
4.3 Measurement system for LCE test . 7
5 Measurement of light conversion efficiency . 8
5.1 General . 8
5.2 Spectral radiance measurement instrument . 8
5.3 Display backlight test platform . 8
5.4 Sample preparation. 8
5.5 Backlight setting . 9
5.6 Measurement procedure . 9
6 Test report . 10
Bibliography . 12

Figure 1 – Standard measurement system . 7
Figure 2 – Schematic structure of Q-LCF . 9

Table 1 – Test report - LCE of Q-LCF (blank) . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Nanomanufacturing - Key control characteristics -
Part 3-5: Nanophotonic products - Light conversion efficiency
of quantum dot enabled light conversion films: luminance meter

FOREWORD
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IEC TS 62607-3-5 has been prepared by IEC technical committee 113: Nanotechnology for
electrotechnical products and systems. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
113/957/DTS 113/986/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 62607 series, published under the general title Nanomanufacturing -
Key control characteristics, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
INTRODUCTION
This document specifies how to measure the light conversion efficiency, which is one of key
control characteristics of quantum dot enabled light conversion films (Q-LCFs).
Quantum dot (QD) is a kind of representative nanomaterial, has typical quantum confinement
effects and exhibits distinct size-dependent properties, that is, the luminescence peak is
adjustable with the QD size. QDs have broad absorption spectra, as the absorption edge is
continuous for all wavelengths shorter than the absorption edge. They are also known for
narrow emission spectra – a trait that arises when QDs are consistent in both size and
composition. Using the same excitation source, commonly blue light-emitting diode, to excite
quantum dots of different particle sizes, QDs of different particle sizes can emit spectra with
different peak wavelengths which are larger than the excitation wavelength. Based on the above
unique characteristics, Q-LCFs are used in display products, greatly improving the colour gamut.
Currently Q-LCFs are widely adopted by television makers (manufacturers, suppliers, etc.) to
add a new feature to liquid crystal displays.
Although they have such advantageous features, quantum dots are sensitive to water, oxygen,
light, high temperature and so on. During the manufacturing process of Q-LCFs, various
chemicals are used to form a solid matrix in which quantum dots are dispersed. After the
quantum dots have been encapsulated in the films, water and oxygen still can pass through the
polymer matrix and reach the quantum dots to a certain degree, depending on the barrier
property of the matrix and encapsulation layer. During and after manufacturing, adverse effects,
such as lowering of quantum efficiency and stability of quantum dots, will occur.
It is critical to measure quantum efficiency of quantum dots in Q-LCFs; however, measurement
of this characteristic by integrating sphere is relatively complicated and of low test efficiency,
the integrating sphere test has limitations, such as the sample size must be smaller than the
size of the integrating sphere, and the luminance range of backlight is narrow. The light
conversion efficiency (LCE) parameter is more meaningful than the quantum efficiency (QE)
parameter in practical industrial applications, as the LED backlight usually has higher luminance.
For measuring LCE, a luminance meter is used as the test tool, which only measures the number
of photons within 2π steradian directly in front of the backlight after excitation of the sample.
This is significantly less than the number of photons collected by the integrating sphere. So the
light conversion efficiency (LCE) measured by this document is directly related to the luminance
actually detected in the display industry, whereas the quantum efficiency is not. It is for this
reason that LCE, a more straightforward characteristic, is measured instead. Brighter Q-LCFs
correlate with higher quantum efficiency of the quantum dots inside the film.
These characteristics will enable supplier and purchas
...