A device that transforms energy from one form to another is known as a transducer.
In biological terms plants are referred to as transducer organisms.
Plant species that trap energy from the sun and nutrients from the soil for the creation of food in the form of carbohydrates are known as producers.
This process of preparing food is known as photosynthesis.
Plants are known as converters or transducers because they transform light energy into chemical energy, which can then be released to power the organism's functions.