How LEDs Work: From Junction to Photon
In short: How an LED turns electric current into light: two doped parts of one semiconductor, a forward-biased junction, electrons meeting holes in a thin active region, and the bandgap that sets the colour, from the blue LED breakthrough to today's efficiency research.
A 2:03 short film in the series “How Things Work”, narrated by intellect_voice_01.
Sources used in this film: U.S. Department of Energy (Office of Scientific and Technical Information), final technical report by award recipient Cree, Inc., April 2016, “1261863”; U.S. Department of Energy, Office of Scientific and Technical Information (OSTI). The page is a final technical report submitted by Philips Lumileds Lighting Company under DOE agreement DE-FC26-08NT0…, “Kickoff Presentation Template – Have need to update”; HyperPhysics (R. Nave, Department of Physics and Astronomy, Georgia State University), “Light Emitting Diodes”; Physics Education Research Group, Kansas State University (Visual Quantum Mechanics teaching materials, NSF-supported), “09Energy_Level_Model_LEDs.pdf”; MIT OpenCourseWare (Massachusetts Institute of Technology), course 3.024 Electronic, Optical and Magnetic Properties of Materials, Spring 2013, Lecture 19-20 notes, “Lecture 19-20”; Cornell University (Farhan Rana, course notes for Semiconductor Optoelectronics, Chapter 7), “Microsoft Word - handout7.docx”; IEEE (Institute of Electrical and Electronics Engineers), IEEE Technology Navigator, “Light emitting diodes | IEEE Technology Navigator”; Nature Physics (Springer Nature), “Nobel Prize 2014: Akasaki, Amano & Nakamura - Nature Physics”; The Royal Swedish Academy of Sciences (press release published on nobelprize.org, Nobel Foundation), “Nobel Prize in Physics 2014”; Phys.org (reporting research from Nagoya University), “Brighter and more efficient LEDs with low polarization resist 'efficiency droop'”.
Sources used in this film
- U.S. Department of Energy (Office of Scientific and Technical Information), final technical report by award recipient Cree, Inc., April 2016 — 1261863 · View →
- U.S. Department of Energy, Office of Scientific and Technical Information (OSTI). The page is a final technical report submitted by Philips Lumileds Lighting Company under DOE agreement DE-FC26-08NT0… — Kickoff Presentation Template – Have need to update · View →
- HyperPhysics (R. Nave, Department of Physics and Astronomy, Georgia State University) — Light Emitting Diodes · View →
- Physics Education Research Group, Kansas State University (Visual Quantum Mechanics teaching materials, NSF-supported) — 09Energy_Level_Model_LEDs.pdf · View →
- MIT OpenCourseWare (Massachusetts Institute of Technology), course 3.024 Electronic, Optical and Magnetic Properties of Materials, Spring 2013, Lecture 19-20 notes — Lecture 19-20 · View →
- Cornell University (Farhan Rana, course notes for Semiconductor Optoelectronics, Chapter 7) — Microsoft Word - handout7.docx · View →
- IEEE (Institute of Electrical and Electronics Engineers), IEEE Technology Navigator — Light emitting diodes | IEEE Technology Navigator · View →
- Nature Physics (Springer Nature) — Nobel Prize 2014: Akasaki, Amano & Nakamura - Nature Physics · View →
- The Royal Swedish Academy of Sciences (press release published on nobelprize.org, Nobel Foundation) — Nobel Prize in Physics 2014 · View →
- Phys.org (reporting research from Nagoya University) — Brighter and more efficient LEDs with low polarization resist 'efficiency droop' · View →
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Sources
- Summary by Intellect · source: U.S. Department of Energy (Office of Scientific and Technical Information), final technical report by award recipient Cr: 1261863
- Also: U.S. Department of Energy, Office of Scientific and Technical Information (OSTI). The page is a final technical report s: Kickoff Presentation Template – Have need to update
- Also: HyperPhysics (R. Nave, Department of Physics and Astronomy, Georgia State University): Light Emitting Diodes
- Also: Physics Education Research Group, Kansas State University (Visual Quantum Mechanics teaching materials, NSF-supported): 09Energy_Level_Model_LEDs.pdf
- Also: MIT OpenCourseWare (Massachusetts Institute of Technology), course 3.024 Electronic, Optical and Magnetic Properties of : Lecture 19-20
- Also: Cornell University (Farhan Rana, course notes for Semiconductor Optoelectronics, Chapter 7): Microsoft Word - handout7.docx
- Also: IEEE (IEEE Technology Navigator): Light emitting diodes | IEEE Technology Navigator
- Also: Nature Physics (Springer Nature): Nobel Prize 2014: Akasaki, Amano & Nakamura - Nature Physics
- Also: The Royal Swedish Academy of Sciences (press release published on nobelprize.org, Nobel Foundation): Nobel Prize in Physics 2014
- Also: Phys.org (reporting research from Nagoya University): Brighter and more efficient LEDs with low polarization resist 'efficiency droop'
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