%0 Journal Article %1 ADMA:ADMA201705017 %A Yin, Tingting %A Fang, Yanan %A Chong, Wee Kiang %A Ming, Koh Teck %A Jiang, Shaojie %A Li, Xianglin %A Kuo, Jer-Lai %A Fang, Jiye %A Sum, Tze Chien %A White, Timothy J. %A Yan, Jiaxu %A Shen, Ze Xiang %D 2017 %J Advanced Materials %K comminution crystals perovskite pressure %P n/a--n/a %R 10.1002/adma.201705017 %T High-Pressure-Induced Comminution and Recrystallization of CH3NH3PbBr3 Nanocrystals as Large Thin Nanoplates %U http://dx.doi.org/10.1002/adma.201705017 %X High pressure (HP) can drive the direct sintering of nanoparticle assemblies for Ag/Au, CdSe/PbS nanocrystals (NCs). Instead of direct sintering for the conventional nanocrystals, this study experimentally observes for the first time high-pressure-induced comminution and recrystallization of organic–inorganic hybrid perovskite nanocrystals into highly luminescent nanoplates with a shorter carrier lifetime. Such novel pressure response is attributed to the unique structural nature of hybrid perovskites under high pressure: during the drastic cubic–orthorhombic structural transformation at ≈2 GPa, (301) the crystal plane fully occupied by organic molecules possesses a higher surface energy, triggering the comminution of nanocrystals into nanoslices along such crystal plane. Beyond bulk perovskites, in which pressure-induced modifications on crystal structures and functional properties will disappear after pressure release, the pressure-formed variants, i.e., large (≈100 nm) and thin (<10 nm) perovskite nanoplates, are retained and these exhibit simultaneous photoluminescence emission enhancing (a 15-fold enhancement in the photoluminescence) and carrier lifetime shortening (from ≈18.3 ± 0.8 to ≈7.6 ± 0.5 ns) after releasing of pressure from 11 GPa. This pressure-induced comminution of hybrid perovskite NCs and a subsequent amorphization–recrystallization treatment offer the possibilities of engineering the advanced hybrid perovskites with specific properties.

@article{ADMA:ADMA201705017, abstract = {High pressure (HP) can drive the direct sintering of nanoparticle assemblies for Ag/Au, CdSe/PbS nanocrystals (NCs). Instead of direct sintering for the conventional nanocrystals, this study experimentally observes for the first time high-pressure-induced comminution and recrystallization of organic–inorganic hybrid perovskite nanocrystals into highly luminescent nanoplates with a shorter carrier lifetime. Such novel pressure response is attributed to the unique structural nature of hybrid perovskites under high pressure: during the drastic cubic–orthorhombic structural transformation at ≈2 GPa, (301) the crystal plane fully occupied by organic molecules possesses a higher surface energy, triggering the comminution of nanocrystals into nanoslices along such crystal plane. Beyond bulk perovskites, in which pressure-induced modifications on crystal structures and functional properties will disappear after pressure release, the pressure-formed variants, i.e., large (≈100 nm) and thin (<10 nm) perovskite nanoplates, are retained and these exhibit simultaneous photoluminescence emission enhancing (a 15-fold enhancement in the photoluminescence) and carrier lifetime shortening (from ≈18.3 ± 0.8 to ≈7.6 ± 0.5 ns) after releasing of pressure from 11 GPa. This pressure-induced comminution of hybrid perovskite NCs and a subsequent amorphization–recrystallization treatment offer the possibilities of engineering the advanced hybrid perovskites with specific properties.}, added-at = {2017-12-01T14:26:42.000+0100}, author = {Yin, Tingting and Fang, Yanan and Chong, Wee Kiang and Ming, Koh Teck and Jiang, Shaojie and Li, Xianglin and Kuo, Jer-Lai and Fang, Jiye and Sum, Tze Chien and White, Timothy J. and Yan, Jiaxu and Shen, Ze Xiang}, biburl = {https://www.bibsonomy.org/bibtex/2f1dd794ea1cd187592d62126d7c83787/fabianopkm}, description = {High-Pressure-Induced Comminution and Recrystallization of CH3NH3PbBr3 Nanocrystals as Large Thin Nanoplates - Yin - 2017 - Advanced Materials - Wiley Online Library}, doi = {10.1002/adma.201705017}, interhash = {bda0be69fb987cddf7a3b56af162d831}, intrahash = {f1dd794ea1cd187592d62126d7c83787}, issn = {1521-4095}, journal = {Advanced Materials}, keywords = {comminution crystals perovskite pressure}, pages = {n/a--n/a}, timestamp = {2017-12-01T14:26:42.000+0100}, title = {High-Pressure-Induced Comminution and Recrystallization of CH3NH3PbBr3 Nanocrystals as Large Thin Nanoplates}, url = {http://dx.doi.org/10.1002/adma.201705017}, year = 2017 }