{"id":146,"date":"2022-01-04T17:37:10","date_gmt":"2022-01-04T09:37:10","guid":{"rendered":"https:\/\/www.eee.hku.hk\/microLED\/?p=146"},"modified":"2022-01-04T17:52:33","modified_gmt":"2022-01-04T09:52:33","slug":"spectral-conversion-with-fluorescent-microspheres-for-light-emitting-diodes","status":"publish","type":"post","link":"https:\/\/www.eee.hku.hk\/microLED\/spectral-conversion-with-fluorescent-microspheres-for-light-emitting-diodes\/","title":{"rendered":"Spectral conversion with fluorescent microspheres for light emitting diodes"},"content":{"rendered":"\n<p class=\"has-text-align-right\">&#8211; <em>KN Hui, PT Lai, and HW Choi<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"326\" height=\"225\" src=\"https:\/\/www.eee.hku.hk\/microLED\/wp-content\/uploads\/2022\/01\/microspherearray.jpg\" alt=\"\" class=\"wp-image-147\" srcset=\"https:\/\/www.eee.hku.hk\/microLED\/wp-content\/uploads\/2022\/01\/microspherearray.jpg 326w, https:\/\/www.eee.hku.hk\/microLED\/wp-content\/uploads\/2022\/01\/microspherearray-300x207.jpg 300w\" sizes=\"auto, (max-width: 326px) 100vw, 326px\" \/><figcaption>Schematic diagram of microsphere-array coated hexLED.<\/figcaption><\/figure>\n\n\n\n<p><strong>Optics Express, vol. 16, 1, pp. 13-18 (2008)<\/strong><\/p>\n\n\n\n<p>An innovative spectral conversion scheme for light emitting diodes using fluorescent microspheres has been demonstrated. An optimally mixed proportion of green and red fluorescent microspheres were coated onto a high-extraction-efficiency GaN micro-LED with emission centred at 470 nm. The microspheres self-assemble into ordered hexagonally arrays, forming regular and uniform coating layers. Devices with cool and warm white emission were achieved. The bluish-white LED has a luminous efficacy of 27.3 lm\/W (at 20 mA) with CIE coordinates of (0.26, 0.28) and 8500K CCT, while the yellowish-white LED has a luminous efficacy of 26.67 lm\/W (at 20 mA) with CIE coordinates of (0.36, 0.43) and 13000K CCT.<\/p>\n\n\n\n<p>DOI:<a href=\"https:\/\/doi.org\/10.1109\/LED.2004.826541\" data-type=\"URL\" data-id=\"https:\/\/doi.org\/10.1109\/LED.2004.826541\"> <\/a><a href=\"https:\/\/doi.org\/10.1364\/OE.16.000013\" data-type=\"URL\" data-id=\"https:\/\/doi.org\/10.1364\/OE.16.000013\" target=\"_blank\" rel=\"noreferrer noopener\">10.1364\/OE.16.000013<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8211; KN Hui, PT Lai, and HW Choi Optics Express, vol. 16, 1, pp. 13-18 (2008) An innovative spectral conversion scheme for light emitting diodes&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[7,4],"class_list":["post-146","post","type-post","status-publish","format-standard","hentry","category-publications","tag-color-tuning","tag-microled"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/146","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/comments?post=146"}],"version-history":[{"count":2,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/146\/revisions"}],"predecessor-version":[{"id":159,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/146\/revisions\/159"}],"wp:attachment":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/media?parent=146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/categories?post=146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/tags?post=146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}