Fast & Responsive Light Sensing Materials: Exploring Options for Photoresistors

In summary, the conversation discussed the search for easy to obtain and fast responding photoresistors that can decrease in resistance when exposed to light. The use of photodiodes was mentioned, but it was noted that they require a transistor to amplify the detection and their response is not a decrease in resistance. The use of CdS photoresistors was also mentioned, but they are too slow and the response must be significant. The question was raised if anyone has experience with POLYVINYLCARBAZOLE.
  • #1
planety_vuki
21
1
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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  • #2
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.
 
  • #3
does anybody have experience with POLYVINYLCARBAZOLE ?
 

Related to Fast & Responsive Light Sensing Materials: Exploring Options for Photoresistors

1. How do photoresistors work?

Photoresistors, also known as light-dependent resistors, are made of a semiconductor material that changes its resistance when exposed to light. When light hits the material, it causes a flow of electrons and changes the electrical conductivity of the material, resulting in a change in resistance.

2. What are the advantages of using fast and responsive light sensing materials for photoresistors?

The use of fast and responsive light sensing materials in photoresistors allows for quicker detection and response to changes in light intensity. This makes them ideal for applications such as light sensors in cameras and automatic lighting systems.

3. What are some common materials used in fast and responsive light sensing photoresistors?

Some common materials used in fast and responsive light sensing photoresistors include silicon, cadmium sulfide, and lead sulfide. These materials have high sensitivity to light and can produce a fast response time.

4. How are fast and responsive light sensing materials tested for their performance in photoresistors?

Fast and responsive light sensing materials are tested by measuring their sensitivity to different wavelengths of light and their response time. They are also tested for their stability and durability over time.

5. What are some current research and advancements in fast and responsive light sensing materials for photoresistors?

Current research in this area is focused on developing new materials with even faster response times and higher sensitivity to light. Some advancements include using nanotechnology to create more efficient and sensitive photoresistors, as well as incorporating these materials into flexible and wearable devices.

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