Abstract
Perovskite solar cells (PSCs), as one kind of thin-film photovoltaic technology, has dramatic development during the last decades. In recent years, the power conversion efficiency (PCE) of perovskite solar cells has reached ~25%, which is being comparable with the performance of crystalline Silicon solar cells. With low-temperature solution processing method and the thin film structure compared with high temperature processed bulk crystalline Silicon solar cells, the PSCs have attracted much attention with its potential to be developed into low-cost thin film photovoltaic devices.
Although PSCs has achieved favorable PCE at current stage, there are still factors limiting its application. One of the most serious problem hindering the commercialization process is the stability of PSCs. The perovskite tend to decompose under constant light illumination and the degradation process can be accelerated by the penetration of moisture and oxygen from ambient environment. Although encapsulation of PSCs can physically block the moisture and oxygen from external environment, the water will still penetrate at a low rate across the encapsulation layer. Therefore, the interfacial modification is considered as an important strategy to not only perform as barrier material between charge transport layers(CTLs) and perovskite, but also help to improve the PCE. Interfacial modification can tune the energy level alignment, passivate interfacial defects, improve the crystallinity of perovskite and act as barrier material against moisture, hence improve the efficiency and stability at the same time. This seminar will introduce PSCs, interfacial modificaton and the plan to fabricate efficient PSCs with high stability by searching better interlayer materials.
Anyone interested is welcome to attend.