On July 3rd, the prestigious Solar Cell Efficiency Tables published Version 64, in which they announce a new world record for perovskite solar cell performance set by Professor Xu's team, with a certified stable efficiency of 26.7%. USTC achieved 26.7% efficiency for perovskite solar cells. (Image by USTC)
Among the certification agencies, Newport PV lab has certified most number of devices (34 out of 69 devices). Scaling up the size of the perovskite solar cell is a necessary step towards future commercialization. Larger solar cells or modules usually demonstrate lower efficiency due to scaling up issues (Rong et al., 2018).
Continuous efficiency improvements are still necessary for perovskite solar cells, and a data review on devices performance over multiple studies could boost the technology development. Such review could identify patterns or provide insights that are not obvious in a single study.
The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has developed rapidly over the past decade 1, 2, 3, 4, 5, 6, 7, with a certified efficiency of 26.1% obtained 8. Realizing long-term stability on highly efficient PSCs is an important prerequisite for commercialization.
One critical process to scale up for perovskite solar cell is deposition for perovskite as the absorber layer (Huang et al., 2019). Currently spin coating is the most adopted method to deposit perovskite layer in a research lab setting. 60 out of 69 certified solar cells used the spin coating method for perovskite deposition.
Under thermal cycling conditions, our PSCs sustained 95% of their efficiency over 500 cycles, exceeding the IEC 61215 and ISOS-T-3I standards. The mechanical stability of interfaces in perovskite solar cells is not well understood.