{"id":234055,"date":"2024-10-19T15:15:56","date_gmt":"2024-10-19T15:15:56","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iec-60747-5-82019\/"},"modified":"2024-10-25T09:47:30","modified_gmt":"2024-10-25T09:47:30","slug":"bs-iec-60747-5-82019","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iec-60747-5-82019\/","title":{"rendered":"BS IEC 60747-5-8:2019"},"content":{"rendered":"<p>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.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>undefined  <\/td>\n<\/tr>\n<tr>\n<td><b>4<b><\/td>\n<td>English <br \/> CONTENTS  <\/td>\n<\/tr>\n<tr>\n<td><b>5<b><\/td>\n<td>FOREWORD  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions <br \/> 3.1 General terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>3.2 Terms and definitions relating to the measurement of the efficiency  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>4 Measuring methods <br \/> 4.1 Basic requirements <br \/> 4.1.1 Measuring conditions <br \/> 4.1.2 Measuring instruments and equipment <br \/> 4.2 Power efficiency (\u03b7PE) measurement <br \/> 4.2.1 Purpose <br \/> 4.2.2 Measurement procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>4.3 External quantum efficiency (\u03b7EQE) measurement <br \/> 4.3.1 Purpose <br \/> 4.3.2 Measurement procedure <br \/> 4.4 Voltage efficiency (\u03b7VE) measurement <br \/> 4.4.1 Purpose <br \/> 4.4.2 Measurement procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>4.5 Internal quantum efficiency (\u03b7IQE) measurement <br \/> 4.6 Light extraction efficiency (\u03b7LEE) measurement <br \/> 4.6.1 Purpose <br \/> 4.6.2 Measurement procedure <br \/> 4.7 Measurement sequences  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>5 Test report <br \/> Figures <br \/> Figure 1 \u2013 Sequences of the efficiency measurements  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>Annex A (informative)Test example <br \/> Figure A.1 \u2013 Radiant power and forward voltage as a function of forward current  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>Figure A.2 \u2013 Power efficiency as a function of forward current <br \/> Figure A.3 \u2013 Emission spectrum distribution versus wavelength  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>Figure A.4 \u2013 Mean photon energy as a function of forward current <br \/> Figure A.5 \u2013 External quantum efficiency as a function of forward current  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>Figure A.6 \u2013 Voltage efficiency as a function of forward current <br \/> Figure A.7 \u2013 Internal quantum efficiency as a function of forward current  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>Figure A.8 \u2013 Light extraction efficiency as a function of forward current <br \/> Figure A.9 \u2013 Optoelectronic efficiencies as a function of forward current: PE, EQE, VE, IQE, and LEE  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>Table A.1 \u2013 Summary of test report  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Semiconductor devices &#8211; Optoelectronic devices. Light emitting diodes. Test method of optoelectronic efficiencies of light emitting diodes<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2019<\/td>\n<td>22<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":234060,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[577,2641],"product_tag":[],"class_list":{"0":"post-234055","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-31-080-99","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/234055","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/234060"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=234055"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=234055"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=234055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}