| Work Detail |
Chinese perovskite solar module specialist Mellow Energy and Jinan University have developed a new perovskite solar module manufacturing process that enables the formation of a protective layer at the interface between the perovskite absorber and the perovskite transport layer. electrons. This prevents the effusion of volatile components from the perovskite film.
Chinese perovskite solar cell and module manufacturer Mellow Energy, a spin-off company from Jinan University Institute of New Energy Technology, has manufactured a monolithic perovskite solar module based on an interconnection technique that reportedly avoids the effusion of volatile components from the perovskite solar cell absorber.
“In monolithic perovskite solar modules, ion migration in the interconnection region is a critical factor that affects both efficiency and stability,” Shaohang Wu, a researcher at Jinan University, told pv magazine . “To solve this problem, Jinan University and Mellow Energy have proposed an innovative method for in situ generation of ion barrier layers, resulting in substantial improvement in efficiency and stability. “This gas phase treatment technique requires simple equipment, is easy to use and eliminates the need for additional coating processes, making it well suited for integration into production lines.”
The scientists fabricated the panel with an inverted perovskite cell based on an antidiffusion layer, a glass and indium tin oxide (ITO) substrate, a poly-triarylamine (PTAA) hole transport layer (HTL), an absorber of 3D-2D perovskite hybridized with PoBx species, an electron transport layer (ETL) based on a buckminsterfullerene (C60) and tin(IV) oxide (SnO2), and a silver metal (Ag). They interconnected the solar cells through stripes P1, P2 and P3.
They explained that ETL was deposited on the perovskite adsorbent by atomic layer deposition (ALD) to inhibit the vertical escape of volatile species. They then applied a post-hardening to improve the redistribution and recrystallization of the perovskite composition. The 2D/3D heterostructure aims to accelerate charge extraction at the perovskite/C60 interface and suppress light-induced halide segregation.
“PbOx materials are directionally generated by selective growth using a gas-solid reaction method,” the scientists explain. “And we have confirmed that PbOx can be a good barrier and passivation layer.”
Tested under standard lighting conditions, the solar cell achieved a power conversion efficiency of 21.37%, an open circuit voltage of 7.195 V, a short circuit current of 47.15 mA, and a fill factor of 80.89. %. The device was also able to retain about 90% of its initial efficiency after 1,184 h.
The solar module and its manufacturing process are described in the article “ Efficient and Stable Perovskite Solar Modules Enabled by Inhibited Escape of Volatile Species ,” recently published in Advanced Materials . “This scheme provides a good idea to achieve efficient and stable perovskite photovoltaic modules in the industry,” stated the research group.
Another research group from Jinan University recently presented a perovskite solar module with an efficiency of 21.07%. This device was fabricated by selective nanosecond pulse and laser-induced ablation to obtain high-quality interconnection. |
