Timeline for n-p-n p-n-p and n-n-n heterostructure for LED
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 15, 2014 at 17:14 | vote | accept | celos | ||
| Apr 4, 2014 at 5:51 | comment | added | boyfarrell | celos you should start exception some answer to your questions, you have accepted non so far... | |
| Mar 28, 2014 at 9:10 | answer | added | boyfarrell | timeline score: 2 | |
| Mar 24, 2014 at 14:16 | comment | added | celos | ok, suppose I want to make nnn type heterostructure LED by sandwiching a lower BG material(n-GaAs) in between two higher BG material(n-AlGaAs).I tried drawing its energy diagram and and then found out that in this case only holes can be confined in active layer. Also according to this energy diagram, electron injection is not difficult. Similarly for ppp-hetrostructure (p-GaAs sandwiched between two p-AlGaAs) only electrons can be confined(Am I right?). So my question is that would these types of heterostructure LED work effectively? Also why ppn-hetrostructure LED is more preferred? | |
| Mar 23, 2014 at 15:52 | comment | added | boyfarrell | Can you post more information about the specific structure that is confusing you. As user6972 correctly suggests LEDs are basically a forward biased pn-junction. Any deviation from that basic structure is just an optimisation, nothing fundamental. | |
| Mar 22, 2014 at 18:46 | comment | added | user6972 | For example here is a resonant cavity led structure. ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-org/chap23/… or a current blocking layer ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-org/chap23/… | |
| Mar 22, 2014 at 18:21 | comment | added | user6972 | Are you learning about band gap theory or quantum well theory? Can you edit your question with the example? Basically LED's are pn junctions with other things doped in between. As shown in the paper there are many considerations as to structure and doping. It has less to do with nnp, ppn, etc. Perhaps this will provide some more background ee.sc.edu/personal/faculty/simin/ELCT566/… | |
| Mar 22, 2014 at 14:45 | comment | added | celos | That was really a good paper but it didn't answer my question. That paper explained the advantages of SH over DH LED. But I want to know why ppn DH LED, why not other types like nnp, nnn type DH? | |
| Mar 22, 2014 at 9:06 | history | edited | anna v | CC BY-SA 3.0 |
spellings
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| Mar 22, 2014 at 8:26 | comment | added | user6972 | Double Heterostructures are more common. Here's an old paper discussing single vs. double and a variety of example structures. www3.alcatel-lucent.com/bstj/vol58-1979/articles/… | |
| Mar 22, 2014 at 7:15 | history | edited | John Rennie | CC BY-SA 3.0 |
Typo
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| Mar 22, 2014 at 4:15 | history | asked | celos | CC BY-SA 3.0 |
