Are There Fast-Responding Photoresistors for Light Sensing?

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SUMMARY

Fast-responding photoresistors are essential for effective light sensing applications. While photodiodes offer rapid response times, they require amplification through transistors, complicating their use. In contrast, CdS photoresistors are slow, particularly in transitioning from light to dark, with minimal resistance change. The discussion highlights the potential of POLYVINYLCARBAZOLE as an alternative material for achieving quicker response times and significant resistance variation.

PREREQUISITES
  • Understanding of photoconductive materials
  • Familiarity with photodiodes and their operational principles
  • Knowledge of resistance measurement techniques
  • Basic electronics, including transistors and amplification
NEXT STEPS
  • Research the properties and applications of POLYVINYLCARBAZOLE in light sensing
  • Explore the design and implementation of photodiode circuits with transistors
  • Investigate alternative fast-responding photoresistor materials
  • Learn about the characteristics and performance metrics of various light sensors
USEFUL FOR

Electronics engineers, hobbyists in light sensing technology, and researchers exploring advanced photoconductive materials will benefit from this discussion.

planety_vuki
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Are there any easy to obtain and fast responding photoresistors out there ? The resistance of material must decrease when light in shining on it, and the response must be fast.

Note: I know that photodiodes respond extremely fast but they must be used coupled with a transistor to amplify the detection. Also photodiodes response is not decrease in resistance but generation of voltage.

I use a cheap CdS photoresistors but they are too slow, especially when going from light to dark.
 
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Oh and response must be huge. CdS photoresistors, although slow responding, change their resistance from almost infinity to almost zero. I mean what's the mean if material changes resistance from say 1000 ohm to 800 ohm or something like that.
 
does anybody have experience with POLYVINYLCARBAZOLE ?
 

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