{"id":878,"date":"2018-11-28T13:43:12","date_gmt":"2018-11-28T18:43:12","guid":{"rendered":"http:\/\/web.colby.edu\/ch141\/?p=878"},"modified":"2018-12-02T23:09:21","modified_gmt":"2018-12-03T04:09:21","slug":"making-while-light-materials-research-for-a-better-world","status":"publish","type":"post","link":"https:\/\/web.colby.edu\/ch141\/2018\/11\/28\/making-while-light-materials-research-for-a-better-world\/","title":{"rendered":"Making White Light – materials research for a better world"},"content":{"rendered":"
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\u201cIncandescent bulbs are one of the most energy-inefficient products in daily use<\/strong><\/a>,\u201d Joanna McKittrick says. Touch a regular old 100-W light bulb after it\u2019s been lit for a few minutes, and you\u2019ll see what she means.<\/span><\/p>\n<\/div>\n

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Less than 5% of the electrical energy that goes into the tungsten filament inside is converted to visible light, explains McKittrick, a luminescent materials specialist at the University of California, San Diego. The rest is wasted as heat that, should you follow our instructions, will burn your fingers.<\/p>\n<\/div>\n

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Incandescents \u201cbasically haven\u2019t changed since Thomas Edison invented them\u201d about 140 years ago, she says.<\/p>\n<\/div>\n

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Discovered via computational screening for new phosphors, this compound (above) is the first member of the previously unknown Sr-Li-Al-O crystal family. Black outline = unit cell. Gold = Sr. Red = Li. Green = Al. Blue = O.<\/p><\/div>\n

Bulbs that contain light-emitting diodes (LEDs), on the other hand, can produce the same amount of white light but barely feel warm to the touch. That\u2019s because LEDs are more energy efficient. A 15-to-20-W LED can produce the same brightness as a 100-W incandescent, roughly 1,500 lumens. LEDs are also less fragile and can last tens of thousands of hours longer. Nevertheless, these modern alternatives currently account for less than 10% of lighting worldwide, according to data from the U.S. Department of Energy.<\/p>\n<\/div>\n

more …\u00a0https:\/\/cen.acs.org\/materials\/inorganic-chemistry\/chemical-search-better-white-light\/96\/i46<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u201cIncandescent bulbs are one of the most energy-inefficient products in daily use,\u201d Joanna McKittrick says. Touch a regular old 100-W light bulb after it\u2019s been lit for a few minutes, and you\u2019ll see what she means. Less than 5% of the electrical energy that goes into the tungsten filament inside is converted to visible light, […]<\/p>\n","protected":false},"author":184,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[135920],"tags":[],"_links":{"self":[{"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/posts\/878"}],"collection":[{"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/users\/184"}],"replies":[{"embeddable":true,"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/comments?post=878"}],"version-history":[{"count":6,"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/posts\/878\/revisions"}],"predecessor-version":[{"id":895,"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/posts\/878\/revisions\/895"}],"wp:attachment":[{"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/media?parent=878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/categories?post=878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/web.colby.edu\/ch141\/wp-json\/wp\/v2\/tags?post=878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}