Interface engineering of inverted wide-bandgap perovskite solar cells for tandem photovoltaics

Wide-bandgap perovskite solar cells(WBG PSCs)have garnered significant research attention for their potential in tandem solar cells.However,they face challenges such as high open-circuit voltage losses and severe phase instability.These issues are primarily owing to the formation of defects,ion migration,and energy level mismatches at the interface of WBG perovskite devices.Meanwhile,inverted PSCs demonstrate superior stability potential and compatibility with tandem devices,making them the most promising application for WBG perovskite materials.Consequently,interface modulation for such devices has become imperative.In this review,from the perspective of applicability in tandem devices,we first provided a concise overview of WBG perovskite research and its efficiency progress in inverted devices.We further discussed interface carrier dynamics and the potential impact of interfaces on such device performance.Afterward,we presented a comprehensive summary of interface engineering in inverted WBG perovskite(1.60 eV-1.80 eV)solar cells.The research particularly explored both the upper and buried interfaces of WBG absorbers in the inverted PSCs,thoroughly investigating interface design strategies and outlining promising research directions.Finally,this review provides insight into the future development of interface engineering for high-performance and large-area WBG PSCs.

Production of hydrogen-rich gas and multi-walled carbon nanotubes from ethanol decomposition over molybdenum modified Ni/MgO catalysts

A series of molybdenum modified Ni/MgO catalysts （Ni-Mo/MgO） with different loading ratios of Ni ： Mo were prepared by impregnation method. Ethanol decomposition to co-produce multi-walled carbon nanotubes and hydrogen-rich gas at temperatures of 600-800 ℃ was inves- tigated over the synthesized Ni-Mo/MgO catalysts. The results showed that the catalytic activity depended strongly on the reaction temperature and loading ratio of Ni ： Mo. According to the gaseous and solid products obtained, the reaction pathways for ethanol decomposition were suggested.

Scalable spray coated high performance sulfurized electron transporter for efficient and stable perovskite solar modules

The stability issue has been acknowledged as the bottleneck in the practical application of perovskite photovoltaics,while the stabilized interface between the perovskites and charge transport layers dominates their stability performance under different stresses.Here,we developed a high-performance sulfurized zinc-titanium mixed oxide(ZTO-S)electron transport layer(ETL)to fabricate large-area efficient and long-term 85℃/85%RH stable perovskite solar modules.The scalably prepared ZTO-S using the facile spray coating method demonstrates excellent electron mobility close to that of Zn O,in addition to promoting the uniform crystallization of perovskite film across the entire module via the interaction between surface S and Pb^(2+).Furthermore,this novel coordination stabilized the interface and reduced the interfacial non-radiative recombination defects within the devices,yielding an efficient and stable performance for the modules.High efficiency of 21.73%and 17.50%was achieved for blade-coated 36 cm^(2)and 100 cm^(2)perovskite solar modules,respectively.In addition,the encapsulated module(36 cm^(2))shows an attractive humidity and heat stability(85℃/85%RH)performance with a maintained 93.5%of the initial PCE over 1000 h.