Carbon nanotubes provide a boost to perovskite solar
While perovskites and carbon nanotubes are both hot topics for research, few studies have looked at combinations of the two. Research to date has established, while pure carbon nanotubes can boost the efficiency of perovskites when used as an electrode layer, the two do not bond well, leading to potential problems at the interface between layers.
Scientists at the Tokyo Institute of Technology chose to study that bonding mechanism in depth and found adding an oxygen-containing functional group to the nanotube structure strengthened interaction between the two layers, resulting in a better interface.
The team also found perovskite cells underwent a crystallization process when stored in the dark, further improving the interface. “We have discovered the self-recrystallization ability of perovskite at room temperature, whose morphology greatly improved after long-term storage,” said Keiko Waki, who led the research group. “However, the most interesting result was the ability of functionalized CNTs [carbon nanotubes] to make use of the self-recrystallization nature to form a stronger junction between the perovskite and CNTs through the reconstruction.”
The results, published in RRL Solar, showed cells with initial efficiencies of 3.21-7.89% improved to 9.54-12.14% after two months stored in an ambient medium with relative humidity of 20-50%.
While those efficiencies are far below what has already been achieved with similar perovskite materials, the researchers noted using carbon nanotubes could solve many of the stability issues associated with perovskites as the CNTs served to protect against moisture damage and also drove production of perovskites with fewer defects.
“We hope this study contributes toward the production of perovskites with higher stability and reproducibility,” added Waki.
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[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]
[…] this in mind, researchers from Japan’s Tokyo Institute of Technology (Tokyo Tech) are proposing an alternative system: a “carbon/air secondary battery” (CASB) that […]
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[…] Tokyo Institute of Technology researchers have developed a chemically stable catalyst for the synthesis of ammonia from green hydrogen, improving metal nitride complexes by introducing aluminum into the lanthanum nitride (LaN) lattice. La−Al metallic bonds (La−Al−N) prevent lanthanum atoms from reacting with moisture. “The catalytic activity did not degrade after exposure to air and moisture,” wrote the researchers in “Approach to Chemically Durable Nickel and Cobalt Lanthanum-Nitride-Based Catalysts for Ammonia Synthesis,” which was recently published in Angewandte Chemie. They aim to address rare-earth nitride complexes’ chemical sensitivity to air and moisture to improve their catalytic performance. The La-Al-N support – along with the active metals, such as nickel and cobalt (Ni, Co) – was able to produce NH3 at rates similar to that with conventional metal nitride catalysts. “Kinetic analysis and isotopic experiment showed that La−Al−N is responsible for N2 absorption and activation despite substantial Al being introduced into its lattice because the local coordination of the lattice N remained largely unchanged,” said the researchers. […]