Article View: sci.electronics
Article #5144Re: Blue and UltraViolet LED's
From: John Berryhill
Date: Wed, 18 Jul 1990 16:54
Date: Wed, 18 Jul 1990 16:54
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In article <38692@cci632.UUCP> rdi@ccird3.UUCP (Rick Inzero) writes: >I may have missed a follow-up where my question was answered, but: >just what's so technologically difficult here, regarding the UV LEDs? Finding a wide, direct bandgap semiconductor that can be doped n and p type. Making it pure enough that midgap states won't overwhelm band-to-band recombination (which gets exponentially tougher as the bandgap increases). Making ohmic contact to it. Hoping that it has mechanical and thermal properties that allow it to tolerate operating conditions. Finding a market for it that justifies the R&D expense. Among others... -- John Berryhill 143 King William, Newark DE 19711
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<17596.2699d803@uctvax> <1990Jul11.233848.29098@zoo.toronto.edu> <1551@oucsace.cs.OHIOU.EDU> <38692@cci632.UUCP>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!uwm.edu!cs.utexas.edu!sdd.hp.com!uakari.primate.wisc.edu!aplcen!haven!udel!berryh From: berryh@udel.edu (John Berryhill) Newsgroups: sci.electronics Subject: Re: Blue and UltraViolet LED's Message-ID: <24958@nigel.udel.EDU> Date: 18 Jul 90 16:54:41 GMT References: <17596.2699d803@uctvax> <1990Jul11.233848.29098@zoo.toronto.edu> <1551@oucsace.cs.OHIOU.EDU> <38692@cci632.UUCP> Sender: usenet@ee.udel.EDU Reply-To: berryh@udel.edu (John Berryhill) Distribution: na Organization: University of Delaware Lines: 21