Creation of Highly Efficient and Durable Organic and Perovskite Solar Cells Using Nanocarbon Materials
Yutaka Matsuo
Abstract
Abstract This accounts article describes examples of improving power conversion efficiency and stability of organic and perovskite solar cells by using nanocarbon nanotubes such as fullerene derivatives, endohedral fullerenes, and carbon nanotubes. Appropriately doped carbon nanotubes can replace indium-tin-oxide transparent electrodes and evaporated metal electrodes to produce stable and flexible solar cells. Properly designed fullerene derivatives can serve as electron transporting layer through passivation of defects at the interface between perovskite crystals and an inorganic charge selective layer. Lithium-ion endohedral fullerene can dope organic semiconducting molecules and carbon nanotubes for improving not only power conversion efficiency but also stability because neutral lithium endohedral fullerene forms to scavenge intruding oxygen. The author suggests creation of carbon-rich solar cells using such nanocarbon materials for further development of practical organic solar cells.