tag:blogger.com,1999:blog-34480619.post7231971442761982483..comments2024-03-11T13:47:03.621-05:00Comments on Physics and Physicists: Work Function And Photoemission ThresholdZapperZhttp://www.blogger.com/profile/15861398273820851809noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-34480619.post-89241095478108522102012-10-11T06:50:18.936-05:002012-10-11T06:50:18.936-05:00Thanks Garrett.
Thanks Garrett. <br /><br /> Omnihttps://www.blogger.com/profile/06470586734220576179noreply@blogger.comtag:blogger.com,1999:blog-34480619.post-44188626993133906402012-10-09T07:45:15.616-05:002012-10-09T07:45:15.616-05:00For what it's worth, I've added a discussi...For what it's worth, I've added a discussion to the talk page of the Wikipedia "Work Function" article:<br />https://en.wikipedia.org/wiki/Talk:Work_functionGarrett Curleyhttps://www.blogger.com/profile/02579130144987481839noreply@blogger.comtag:blogger.com,1999:blog-34480619.post-34887722341605971282012-10-09T07:03:53.002-05:002012-10-09T07:03:53.002-05:00"Hum. Been a while since I refreshed my memor..."Hum. Been a while since I refreshed my memory on band gaps and such stuff. If I followed you correctly, isn't the first sentence of the Wikipedia entry also false?<br />"the work function is the minimum energy needed to remove an electron from a solid ..."<br /><br />Shouldn't it be "the work function is defined as the energy difference between the vacuum energy level and the Fermi level of a solid"? I've just rooted out a solid materials book from our lab library and it refers to the energy needed to extract an electron from a semiconductor via a photon as the "photothreshold" = Evac - Ev"<br /><br />If you look at the band diagram, you'll notice that "Evac - Ev" IS equal to the electron affinity plus the band gap!<br /><br />I don't see a problem with that definition of the work function - FOR A METAL. This is because, as I've said, the work function, the electron affinity and the location of the Fermi level are all the same in a metal. In a semiconductor, they are not.<br /><br />Zz.ZapperZhttps://www.blogger.com/profile/15861398273820851809noreply@blogger.comtag:blogger.com,1999:blog-34480619.post-47957758943847961152012-10-09T06:33:48.031-05:002012-10-09T06:33:48.031-05:00Hum. Been a while since I refreshed my memory on b...Hum. Been a while since I refreshed my memory on band gaps and such stuff. If I followed you correctly, isn't the first sentence of the Wikipedia entry also false? <br />"the work function is the minimum energy needed to remove an electron from a solid ..."<br /><br />Shouldn't it be "the work function is defined as the energy difference between the vacuum energy level and the Fermi level of a solid"? I've just rooted out a solid materials book from our lab library and it refers to the energy needed to extract an electron from a semiconductor via a photon as the "photothreshold" = Evac - Ev<br /><br />But I suppose all that is irrelevant as it doesn't address the fundamental flaw of Wikipedia. Of course, it begs the question of why doesn't anybody start up a peer-reviewed equivalent of Wikipedia? Not as competition per say, but as a compliment. I suppose time and money are the main barriers to such a project?<br /><br />Cheers.Garrett Curleyhttps://www.blogger.com/profile/02579130144987481839noreply@blogger.comtag:blogger.com,1999:blog-34480619.post-84080002710279559602012-10-09T03:49:41.854-05:002012-10-09T03:49:41.854-05:00You need to learn how to read AND comprehend. I c...You need to learn how to read AND comprehend. I could spend a lifetime correcting it, and it will still not change my opinion of it. It is FUNDAMENTALLY FLAWED!<br /><br />Zz.ZapperZhttps://www.blogger.com/profile/15861398273820851809noreply@blogger.comtag:blogger.com,1999:blog-34480619.post-61638037708409383822012-10-09T03:10:38.352-05:002012-10-09T03:10:38.352-05:00Did you fix it? Why hate on wiki without editing i...Did you fix it? Why hate on wiki without editing it? Be the change you want to see in the world.Omnihttps://www.blogger.com/profile/06470586734220576179noreply@blogger.com