The efficiency of solar cells is a function of their internal complexity, lithium-ion discharge, and bonded structure. A recent research finds a deformity-based method to improve efficiency of solar cells. Light-emitting technologies and solar cells exhibit a peculiar property – defected internal structures. Further, these structures make room for increasing the overall efficiency of solar cells.
Researchers from the department of physics at Warwick University pioneered the research. And, Nature Communications journal published their findings.
Decoding the Importance of Strain Gradient
The inhomogeneous strain exerted inside solar cells can prevent recombination of photo-excited particles. Further, one can use an external force to facilitate this process inside solar cells. Hence, it is possible to enhance the efficiency of solar cells through successive fabrication and management of strain gradient.
The researchers superimposed an LaAlO3 substrate with a film of BiFeO3 to examine the impact of inhomogeneous deformation. Further, they were able to study BiFeO3 film’s ability to convert photo-energy into electricity. Also, scientists did this looking into the extent to which the film’s strain gradient could separate photo-excited particles.
All types of solar cells consist two forms of semiconductors – p-type and n-type. Post light absorption, the semiconductors split the photo-excited particles. And, the sub-particles tend to move in opposite directions. As a result, this separation is responsible for electricity generation. Further, recombination of particles can result in elimination of electrical charges and null electricity generation. However, the strain gradient inside solar cells can help in preventing this recombination.
Key Photoelectric Properties
The LaAlO3/ BiFeO3 film exhibited interesting photoelectric tendencies. Improved electrical conductivity of the film could have several applications in actuators, UV sensors, and transducers.
With miniaturization in technology, the structure of solar cells could become increasingly disruptive. This distortion in structure can be capitalised upon to increase the efficiency of solar cells. Several scientists could find fresh cues from this research to take their analysis of solar cells forward.