LED As a Solar Cell




About: Hello, I am 17 year old innovator living in India. My interest lies in Electronics. Surf through my creations and enjoy!!!!1

Here the presented instructable shows you how to generate electricity from LED. LED acts as a solar cell when it is kept in reverse bias condition. Read the complete instructable to know how to use LED as a Solar Cell.

Step 1: Materials

1. LED

2. Multimeter

3. Source of Light

Step 2: LED

LED is the light emitting Diode. In my previous instructable I have shown you how to Generate Electricity from Diode. Here, LED is used which is also one type of Diode.

Here LED is to be kept in Reverse Bias i.e. Negative terminal of the LED should be connected to positive terminal of Multi meter and vice versa.

Step 3: How To

As decided earlier Connect the LED in Reverse Bias Condition

Step 4: Observations

When the LED is open in the sun there are readings on multi meter and when the Sunlight is blocked then there are no voltages.

See the images for the observations.

Step 5: In Artificial Light

Here I have kept the LED under the Tubelight very near to it. It generates about 1.5v.



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    6 Discussions


    Question 11 months ago

    which led i can use means which color or type


    1 year ago

    I suspect that for any "usefull" applicatons, this would require several leds in parallel. Is that correct? Havd you tried measuring current output? Four in srries with enough parallel rows to get a useful current might just charge your cell phone. Worth comparing to a solar cell with similar padameters.

    1 reply
    Patel Darshilmikenaly

    Reply 1 year ago

    Yes you are definitely perfect. Well it can't charge your cell phone due to very less or no current obtained.


    1 year ago

    Great project. I just tried this on a few LEDs and it does work remarkably well. I got 1.6 volts when I exposed them to the outside sun light. And it was a solid 1.6 volts as well, measured on a Fluke multi-meter. Sure makes my head wonder now. Hummm.

    1 reply

    1 year ago

    cool! have u tried using it to power somethin? (I havent been able to see the vid yet, so, apology if its on vid)