BS IEC 60747-5-8:2019
$102.76
Semiconductor devices – Optoelectronic devices. Light emitting diodes. Test method of optoelectronic efficiencies of light emitting diodes
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 22 |
IEC 60747-5-8:2019 specifies the terminology and the measuring methods of various efficiencies of single light emitting diode (LED) chips or packages without phosphor. White LEDs for lighting applications are out of the scope of this part of IEC 60747. The efficiencies whose measuring methods are defined in this part are the power efficiency (PE), the external quantum efficiency (EQE), the voltage efficiency (VE), and the light extraction efficiency (LEE). To measure the LEE, the measurement data of the internal quantum efficiency (IQE) is used, whose measuring method is discussed in IEC 60747-5-9 and IEC 60747-5-10. The injection efficiency (IE) and the radiative efficiency (RE) are given definitions only.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | English CONTENTS |
| 5 | FOREWORD |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions 3.1 General terms and definitions |
| 8 | 3.2 Terms and definitions relating to the measurement of the efficiency |
| 10 | 4 Measuring methods 4.1 Basic requirements 4.1.1 Measuring conditions 4.1.2 Measuring instruments and equipment 4.2 Power efficiency (ηPE) measurement 4.2.1 Purpose 4.2.2 Measurement procedure |
| 11 | 4.3 External quantum efficiency (ηEQE) measurement 4.3.1 Purpose 4.3.2 Measurement procedure 4.4 Voltage efficiency (ηVE) measurement 4.4.1 Purpose 4.4.2 Measurement procedure |
| 12 | 4.5 Internal quantum efficiency (ηIQE) measurement 4.6 Light extraction efficiency (ηLEE) measurement 4.6.1 Purpose 4.6.2 Measurement procedure 4.7 Measurement sequences |
| 13 | 5 Test report Figures Figure 1 – Sequences of the efficiency measurements |
| 14 | Annex A (informative)Test example Figure A.1 – Radiant power and forward voltage as a function of forward current |
| 15 | Figure A.2 – Power efficiency as a function of forward current Figure A.3 – Emission spectrum distribution versus wavelength |
| 16 | Figure A.4 – Mean photon energy as a function of forward current Figure A.5 – External quantum efficiency as a function of forward current |
| 17 | Figure A.6 – Voltage efficiency as a function of forward current Figure A.7 – Internal quantum efficiency as a function of forward current |
| 18 | Figure A.8 – Light extraction efficiency as a function of forward current Figure A.9 – Optoelectronic efficiencies as a function of forward current: PE, EQE, VE, IQE, and LEE |
| 19 | Table A.1 – Summary of test report |
| 20 | Bibliography |
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