Researchers enhance efficiency of solar cell light-absorption capacity

• DGIST has announced that the research team led by Professor Choi Jong-min of the Department of Energy Engineering at DGIST enhanced the light absorption capacity and also photocurrent generation of solar cells by applying a nano-structured electrode on the back of a perovskite quantum-dot solar cell, a next-generation solar cell material. On top of that, the group systematically verified the connection between the shape of the nanostructure and the performance of the solar cell and the optimized conditions for the formation of nanopatterns in organic materials.

Perovskite quantum dot solar cells have actually lately remained in the spotlight as a next-generation solar cell since energy generation performance is swiftly enhancing. The effectiveness of a solar cell is generally identified by its capability to absorb light and send electric fees generated by light to the electrode. Although perovskite quantum dots have excellent photoelectric residential or commercial properties, they have limitations in generating photocurrent as they do not develop a thick light absorption layer when producing a solar cell.

Meanwhile, the research group led by Professor Choi Jong-min of the Department of Energy Engineering at DGIST improved the light absorption and photocurrent while preserving the thickness that maximizes the amount of fee removal by forming the back electrode of the perovskite quantum dot solar cell into a nanostructure. The research team effectively personified a back nanostructure electrode by forming a nanopattern on the hole transport layer of a perovskite quantum-dot solar cell through a nanoimprint lithography and consistently transferring an electrode material in addition to it along the contours of the hole transport layer nanopattern.

Additionally, the study group developed nanostructured rear electrodes of various elevations and cycles to verify the partnership amongst the form of the nanostructure, the light absorption capacity, and the electrical loss of the solar cell due to nanostructure. Afterward, the group designed optically as well as electrically effective nanostructured back electrodes and optically enhanced the light absorption capacity of the solar cell and maximized the performance of the solar cell without electrical loss.

The group additionally verified the optimum conditions for nanoimprint lithography based on the partnership in between the glass shift temperature and flexibility of organic materials, which are widely used as cost transfer materials for photoelectric gadgets including solar cells. These success are anticipated to contribute to study on the formation of nanopatterns of various photoelectric devices using organic materials as charge transportation layers in the future.