GB/T 6495.801-2025Photovoltaic devices - Part 8-1: Measurement of spectral responsivity of multi-junction photovoltaic (PV) devices (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 8-1 of GB/T 6495 "Photovoltaic Devices". GB/T 6495 has already published the following parts.

---Part 1: Measurement of Photovoltaic Current-Voltage Characteristics;

---Part 1-1.Measurement of Current-Voltage Characteristics of Multijunction Photovoltaic Devices;

---Part 2: Requirements for Standard Photovoltaic Devices;

---Part 3: Measurement Principles of Ground-Based Photovoltaic Devices Based on Standard Spectral Irradiance Data;

---Part 5: Determining the Equivalent Cell Temperature (ECT) of Photovoltaic Devices Using the Open-Circuit Voltage Method;

---Part 7: Calculation Method for Spectral Mismatch Correction in Photovoltaic Device Measurements;

---Part 8: Measurement of the Spectral Response of Photovoltaic Devices;

---Part 8-1.Measurement of the Spectral Response of Multijunction Photovoltaic Devices;

---Part 9: Solar Simulator Characteristic Classification;

---Part 10: Methods for measuring linear correlation and linearity;

---Part 11: Initial light-induced degradation test method for crystalline silicon solar cells.

This document is equivalent to IEC 60904-8-1:2017 "Photovoltaic devices - Part 8-1.Measurement of spectral response of multijunction photovoltaic devices".

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.

This document is under the jurisdiction of the National Technical Committee on Standardization of Solar Photovoltaic Energy Systems (SAC/TC90).

Introduction

GB/T 6495 proposes methods for measuring the performance of photovoltaic devices, as well as standards, value transfer, and result correction related to performance measurement.

The requirements for the classification of testing equipment, etc., have positive guiding significance for the performance measurement of photovoltaic devices such as photovoltaic cells and photovoltaic modules.

GB/T 6495 is proposed to consist of the following parts.

---Part 1: Measurement of Photovoltaic Current-Voltage Characteristics. The purpose is to define the basic requirements for measuring the IV curve of photovoltaic devices.

---Part 1-1.Measurement of Current-Voltage Characteristics of Multijunction Photovoltaic Devices. The purpose is to specify the measurement of the IV characteristics of multijunction photovoltaic devices.

Quantification method.

---Part 1-2.Measurement of Current-Voltage Characteristics of Bifacial Photovoltaic Devices. The purpose is to specify the measurement of the IV characteristics of bifacial photovoltaic devices.

Quantification method.

---Parts 1-3.Measurement of Current-Voltage Characteristics of Curved Photovoltaic Devices. The purpose is to specify the measurement of the IV characteristics of curved photovoltaic devices.

Quantification method.

---Part 2: Requirements for Standard Photovoltaic Devices. The purpose is to specify the requirements for standard photovoltaic devices.

---Part 3: Measurement Principles of Ground-Based Photovoltaic Devices Based on Standard Spectral Irradiance Data. The aim is to provide standard photovoltaic irradiance data.

Degree data.

---Part 4: Procedures for Establishing Standard Photovoltaic Device Calibration Traceability. The purpose is to establish traceability for photovoltaic device calibration.

program.

---Part 5: Determining the Equivalent Cell Temperature (ECT) of Photovoltaic Devices Using the Open-Circuit Voltage Method. The aim is to define the equivalent cell temperature (ECT) of photovoltaic devices.

Method for testing the open-circuit voltage of battery temperature.

---Part 7: Calculation Method for Spectral Mismatch Correction in Photovoltaic Device Measurements. The purpose is to specify the calculation method for spectral mismatch correction.

---Part 8: Measurement of the Spectral Response of Photovoltaic Devices. The purpose is to specify the methods for measuring the spectral response.

---Part 8-1.Measurement of the Spectral Response of Multijunction Photovoltaic Devices. The purpose is to specify the measurement method for the spectral response of multijunction photovoltaic devices.

method.

---Part 9: Classification of Solar Simulator Characteristics. The purpose is to specify the classification requirements for solar simulators used to measure photovoltaic devices.

---Part 10: Methods for Measuring Linear Correlation and Linearity Characteristics. The aim is to define the linearity characteristics of photovoltaic devices and their testing.

method.

---Part 11: Test Method for Initial Light-Induced Degradation of Crystalline Silicon Solar Cells. The purpose is to specify the initial light-induced degradation test method for crystalline silicon solar cells.

Attenuation test method.

---Part 12: Measurement methods for the current-voltage (IV) characteristics of perovskite photovoltaic cells and modules. The purpose is to specify the measurement methods for the current-voltage (IV) characteristics of perovskite photovoltaic cells and modules.

Methods for measuring the IV characteristics of voltage-voltage devices.

---Part 13: Electroluminescence of Photovoltaic Modules. The purpose is to specify the testing methods for the electroluminescence of photovoltaic modules.

Note. The correspondence between each part and the IEC 60904 series of international standards is as follows.

---Part 1 corresponds to IEC 60904-1;

---Part 1-1 corresponds to IEC 60904-1-1;

---Parts 1-2 correspond to IEC 60904-1-2;

---Parts 1-3 correspond to IEC 60904-1-3;

---Part 2 corresponds to IEC 60904-2;

---Part 3 corresponds to IEC 60904-3;

---Part 4 corresponds to IEC 60904-4;

---Part 5 corresponds to IEC 60904-5;

---Part 7 corresponds to IEC 60904-7;

---Part 8 corresponds to IEC 60904-8;

---Part 8-1 corresponds to IEC 60904-8-1;

---Part 9 corresponds to IEC 60904-9;

---Part 10 corresponds to IEC 60904-10;

---Part 13 corresponds to IEC 60904-13.

This document specifies the measurement guidelines for the spectral responsivity of multi-junction photovoltaic devices, as outlined in Part 8 of GB/T 6495, Single-junction Photovoltaic Devices.

Based on the existing requirements for spectral responsivity measurement, additional requirements for the measurement of spectral responsivity of multi-junction photovoltaic devices are specified, describing only the requirements for two-terminal multi-junction photovoltaic devices.

Measurement of the spectral responsivity of each single junction in the device.

Photovoltaic Devices Part 8-1.

Measurement of the spectral response of multijunction photovoltaic devices

1 Scope

This document applies to non-concentrating multi-junction photovoltaic (PV) devices. Some content in this document may also apply to concentrated multi-junction PV devices.

The spectral response is required when analyzing the current-voltage characteristics of multi-junction photovoltaic devices.

IEC 60904-8 specifies the requirements for measuring the spectral responsivity of single-junction photovoltaic devices, while this document specifies the requirements for measuring the spectral responsivity of multi-junction photovoltaic devices.

Additional requirements for spectral responsivity measurement. This document only describes the measurement of the spectral responsivity of each single junction in a two-terminal multi-junction photovoltaic device.

For photovoltaic devices designed and used under concentrated light conditions, this document may still be applicable if measurements are to be taken without concentrating optics.

Applicable.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

IEC 60904-8 Photovoltaic devices - Part 8: Measurement of the spectral response of photovoltaic devices Note. GB/T 6495.8-2025 Photovoltaic devices - Part 8: Measurement of spectral response of photovoltaic devices (IEC 60904-8:2014, IDT) Note. GB/T 6495.9-2025 Photovoltaic devices - Part 9: Characteristic classification of solar simulators (IEC 60904-9:2020, IDT)

3 Terms and Definitions

The terms and definitions defined in IEC TS61836 and the following terms and definitions apply to this document.

The ISO and IEC standard terminology database addresses are as follows.

The subjunction that produces the minimum photocurrent in a multi-junction photovoltaic device under given irradiation conditions.

4 Introduction

IEC 60904-8 details the measurement method for the spectral responsivity of single-junction photovoltaic devices. The spectral responsivity of multi-junction photovoltaic devices...