Ultrafast transformation of PbI2 in two-step fabrication of halide perovskite films for long-term performance and stability via nanosecond laser shock annealing

Journal of Materials Chemistry C ◽

10.1039/d1tc02475b ◽

2021 ◽

Author(s):

Huanrui Yang ◽

Chunpeng Song ◽

Tiancheng Xia ◽

Shifeng Li ◽

Dingyue Sun ◽

...

Keyword(s):

Tensile Strain ◽

Organic Salt ◽

Nanosecond Laser ◽

Laser Shock ◽

Halide Perovskite ◽

Long Term Performance ◽

Salt Diffusion ◽

Term Performance ◽

Kinetics Of

Nanosecond laser shock annealing is used to induce ultrafast organic salt diffusion into the PbI2 layer to modulate the crystalline structure, residual tensile strain, and electron transport kinetics of perovskite films.

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The Role of Metal Ion Solubility in Leaching of Nuclear Waste Glasses

MRS Proceedings ◽

10.1557/proc-11-93 ◽

1981 ◽

Vol 11 ◽

Cited By ~ 6

Author(s):

B. Grambow

Keyword(s):

Nuclear Waste ◽

Metal Ion ◽

Short Term ◽

Long Term Performance ◽

Term Performance ◽

Kinetics Of ◽

Elemental Release ◽

Nuclear Waste Forms

The leachability of solid nuclear waste forms has been studied by many investigators to evaluate the short-term kinetics of elemental release or to determine the effects of leachant composition or other system parameters. Some general observations from these studies have included: incongruent leaching; formation of reaction layers that contain rare-earth, alkaline-earth, or transition metal elements; and apparent saturation of some elements in solution while others continue to be leached. Before these observations can be used to predict long-term performance of waste glasses under repository conditions, the mechanisms controlling the release of elements from the solid must be understood.

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Affects of Hydrogen Peroxide on the Stability of Becquerelite

MRS Proceedings ◽

10.1557/proc-0893-jj05-19 ◽

2005 ◽

Vol 893 ◽

Cited By ~ 3

Author(s):

Karrie-Ann Kubatko ◽

Daniel Unruh ◽

Peter C. Burns

Keyword(s):

Hydrogen Peroxide ◽

Spent Nuclear Fuel ◽

Yucca Mountain ◽

Geologic Repository ◽

Geological Repository ◽

The Stability ◽

Long Term Performance ◽

Term Performance ◽

Kinetics Of

AbstractWhile the majority of studies of alteration of UO2 and commercial spent nuclear fuel under simulated geological repository conditions have emphasized the importance of uranyl oxide hydrates and uranyl silicates, the influence of peroxide on repository performance has been largely overlooked. There is considerable evidence that uranyl peroxides will be important alteration phases of nuclear waste, and that these phases may impact the long-term performance of a geologic repository such as Yucca Mountain. Here we report the thermodynamics and kinetics of becquerelite, Ca[(UO2)6O4(OH)6](H2O)8, in the presence of solutions containing hydrogen peroxide. Thermodynamic calculations reveal that in solutions containing 3.5 × 10-6 M hydrogen peroxide, studtite is thermodynamically favorable over becquerelite at 298 K. To access the kinetics of this reaction, batch experiments were conducted by the reaction of becquerelite and solutions containing hydrogen peroxide. In the presence of 0.1 M hydrogen peroxide, becquerelite altered to studtite within eight hours.

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