IEC TS 62607-7-2:2023

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
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specific
...