LDR theory

[René Schmitz]

Well I remember reading something about LDRs in "Bauer/Wegener
Elektronische Bauelemente). Don't know if it covered temperature effects
however. My guess would be that their behaviour will be similar in nature
to NTCs which aren't devices with definite junctions as well. 
The resistance depends exponential to T in these and I'd expect the same
for a LDR in total darkness. Since additional carriers may be generated
using the same mechanism.

Bye,
 René



At 17:12 25.04.00 +0200, Martin Czech wrote:
>I tried to read more about it...  Most books simply state that "there
>exist LDRs" period.  I begin to realize that the physics of those compound
>semiconductors along with their doping impurities is far more complicated
>then the Shokley Diode model, therefore few formulas are given...
>CdS seems not to be of any interest. May be things vary a lot and are not
>well defined.
>
>Therefore I should try to measure the temperature dependance.
>Perhaps a bit more time this week, I'm a bit tired after
>750km cycling Fr, Sa, So and Mo. I need a rest.
>
>m.c.
>
>

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