IEC TS 62607-7-2:2023

Nanomanufacturing - Key control characteristics - Part 7-2: Nano-enabled photovoltaics - Device evaluation method for indoor light

IEC TS 62607-7-2:2023 specifies the efficiency testing of photovoltaic cells (excluding multi-junction cells) under indoor light. Although it is primarily intended for nano-enabled photovoltaic cells (organic thin-film, dye-sensitized solar cells (DSC), and Perovskite solar cells), it can also be applied to other types of photovoltaic cells, such as Si, CIGS, GaAs cells, and so on.

General Information

• Status: Published
• Publication Date: 26-Jul-2023
• ICS: 07.030 - Physics. Chemistry
• ICS: 07.120 - Nanotechnologies
• ICS: 27.160 - Solar energy engineering
• Technical Committee: TC 113 - Nanotechnology for electrotechnical products and systems
• Drafting Committee: PT 62607-7-2 - TC 113/PT 62607-7-2
• Current Stage: PPUB - Publication issued
• Start Date: 17-Jul-2023
• Completion Date: 27-Jul-2023

Standards Content (Sample)

IEC TS 62607-7-2 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Nanomanufacturing – Key control characteristics –
Part 7-2: Nano-enabled photovoltaics – Device evaluation method for indoor
light
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IEC TS 62607-7-2 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Nanomanufacturing – Key control characteristics –

Part 7-2: Nano-enabled photovoltaics – Device evaluation method for indoor

light
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 07.120; 07.030; 27.160 ISBN 978-2-8322-7255-8

– 2 – IEC TS 62607-7-2:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Abbreviated terms . 9
5 Methods for measuring current-voltage characterization . 10
5.1 General . 10
5.2 Requirements . 10
5.2.1 Device under test (DUT) . 10
5.2.2 Illumination adjustment . 10
5.2.3 Measurement procedure . 11
5.3 Important additional information . 13
6 Indoor reference photovoltaic cells . 14
6.1 Requirements . 14
6.1.1 Selecting indoor reference photovoltaic cells . 14
6.1.2 Calibrating indoor reference photovoltaic cells . 14
6.2 Important notes . 15
7 Standard indoor light – Requirements . 16
7.1 Standard indoor illuminance . 16
7.2 Standard indoor light . 16
7.3 Spectral irradiance of standard indoor light . 16
8 Traceability . 19
8.1 Description – General . 19
8.2 Calibration chain example . 19
9 Temperature correction . 20
9.1 Requirements . 20
9.2 Temperature of the DUT . 20
10 Spectral-mismatch correction . 20
10.1 Requirements . 20
10.1.1 Indoor reference photovoltaic-cell method . 20
10.1.2 Recording results. 21
10.2 Important additional information . 21
11 Spectral responsivity . 21
11.1 Requirements . 21
11.1.1 Spectral responsivity, S(λ) . 21
11.1.2 Measurement methods . 21
11.2 Important notes . 21
12 Illumination sources . 22
12.1 Requirements . 22
12.1.1 Indoor spectral coincidence . 22
12.1.2 Illuminance non-uniformity . 22
12.1.3 Temporal stability . 23
12.1.4 Light source classification . 23
12.1.5 Indoor standard relative spectral responsivity . 23

12.2 Illuminance non-uniformity . 35
13 Nonlinearity . 35
13.1 Requirements . 35
13.2 Important notes . 35
Annex A (informative) Explanations of the provisions, descriptions, and other content
in the standard main body of this document. . 36
A.1 Purpose of this document . 36
A.2 Target of this document . 36
A.3 Issues discussed during deliberation . 36
A.3.1 Adjusting light intensity with an illuminometer . 36
A.3.2 Indoor spectral coincidence . 36
A.3.3 Stability of a DUT (5.2.2) . 37
A.3.4 Maximum power (P ). 37
max
A.4 Supplemental remarks on requirements . 38
A.4.1 Requirements for the DUTs (5.2.1) . 38
A.4.2 Standard indoor light (Clause 7) . 38
A.4.3 Methods for adjusting illuminance (5.2.2) . 39
A.4.4 Quasi-reference photovoltaic cell . 42
A.4.5 Standard indoor light (7.1, 7.2) . 42
A.4.6 Spectral responsivity (11.1.2) . 42
A.4.7 Illumination source and indoor spectral coincidence (12.1.1) . 43
A.4.8 Illumination sources and non-uniformity of brightness (12.1.2) . 44
A.4.9 Temporal stability (12.1.3) . 44
A.4.10 Classification of illumination sources (12.1.5) . 44
A.4.11 Nonlinearity (13.1) . 45
A.5 Correspondence between this document and the IEC 60904 series . 45
Bibliography . 47

Figure 1 – Spectral irradiance of standard indoor light at 1 000 lx . 19
Figure 2 – Calibration chain example . 20
Figure 3 – Standard relative spectral responsivity . 34
Figure A.1 – Configurations of illuminance adjusting methods described in a) A.4.3.2,
b) A.4.3.3 and c) A.4.3.4 . 39
Figure A.2 – PRISM or spectroradiometer method . 40
Figure A.3 – Measurement laboratories. 41
Figure A.4 – Temporal fluctuation of illuminance of a fluorescent lamp . 44

Table 1 – Standard indoor illuminance . 12
Table 2 – Result record . 13
Table 3 – Calibration record . 15
Table 4 – Spectral irradiance (mW/m /nm) of standard indoor light at 1 000 lx . 16
Table 5 – Light source classification . 23
Table 6 – Indoor standard relative spectral responsivity (%) . 24
Table A.1 – Spectral coincidence of F to reference spectrum CIE FL10 . 42
Table A.2 – Spectral coincidence of L to reference spectrum CIE LED-B4 . 42
Table A.3 – Correspondence between clauses of this document and IEC 60904 . 46
Table A.4 – New concepts in this document derived from IEC 60904 . 46

– 4 – IEC TS 62607-7-2:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NANOMANUFACTURING –
KEY CONTROL CHARACTERISTICS –
Part 7-2: Nano-enabled photovoltaics –
Device evaluation method for indoor light

FOREWORD
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