IEC TS 62789:2014

IEC TS 62789 ®
Edition 1.0 2014-12
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
colour
inside
Photovoltaic concentrator cell documentation

Documentation relative aux cellules photovoltaïques à concentration

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IEC TS 62789 ®
Edition 1.0 2014-12
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
colour
inside
Photovoltaic concentrator cell documentation

Documentation relative aux cellules photovoltaïques à concentration

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 27.160 ISBN 978-2-8322-1944-7

– 2 – IEC TS 62789:2014 © IEC 2014
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references . 6
3 Specifications for concentrator cells . 6
4 Concentrator cell characterization . 8
4.1 Overview. 8
4.2 Product identity . 8
4.2.1 General . 8
4.2.2 Manufacturer . 9
4.2.3 Model number . 9
4.2.4 Type of cell . 9
4.3 Product description . 9
4.3.1 General . 9
4.3.2 Total chip area. 9
4.3.3 Designated illumination area . 10
4.3.4 Nominal efficiency and design irradiance . 10
4.3.5 Nominal current ratios . 11
4.3.6 Temperature coefficients . 11
4.3.7 Front metallization . 11
4.3.8 Back metallization . 11
4.3.9 Antireflection coating design . 11
4.3.10 Thickness of substrate . 11
4.4 Cell processing and use conditions . 11
4.4.1 Recommended cell operating temperature . 11
4.4.2 Maximum cell photocurrent . 12
4.4.3 Recommended cell processing temperature . 12
4.4.4 Chemical compatibilities/incompatibilities . 12
4.4.5 Storage conditions . 12
4.4.6 Recommended bonding method . 12
4.5 Graphs and tables. 12
4.5.1 Typical I-V curve . 12
4.5.2 Efficiency versus irradiance . 13
4.5.3 Vmp versus irradiance . 13
4.5.4 Quantum efficiency . 14
4.5.5 Angular responsivity . 16
4.6 Cell testing. 17
Bibliography . 18

Figure 1 – Total cell area and designated illumination area . 10
Figure 2 – Example current-voltage graph. 12
Figure 3 – Example graph of efficiency as a function of irradiance . 13
Figure 4 – Example graph showing voltage as a function of irradiance . 13
Figure 5 – Example graph of external quantum efficiency . 14
Figure 6 – Example graph showing response as a function of the angle of incidence . 17

Table 1 – Specification template . 7
Table 2 – Example tabulation of quantum efficiency data . 14

– 4 – IEC TS 62789:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC CONCENTRATOR CELL DOCUMENTATION

FOREWORD
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