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Article Abstract
Widening the bandgaps while maintaining a strong second harmonic generation response has always been a research hotspot in the field of nonlinear optical iodate materials. A strategy involving covalent bonding is proposed that leverages the high valent later main group cation to construct iodates with predominantly covalent interactions. By using BiO(IO) as a template, the first Sb-containing polar iodate, SbO(OH)(IO) is successfully isolated. The introduction of the two hydroxide anions led to the reduction of layered BiO(IO) into 1D SbO(OH)(IO) in which two corner-sharing SbO(OH) octahedra are further bridged by an iodate group. The covalently bonded [SbO(OH)] chains and the optimal packing fashion of the asymmetric IO groups generate a very strong second harmonic generation signal of 14 times that of KHPO. Furthermore, SbO(OH)(IO) exhibits a wide bandgap of 4.14 eV and a high laser induced damage threshold [27.9 × AgGaS, 0.2 × KHPO (10 ns, 10 Hz)].
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| http://dx.doi.org/10.1002/smll.202407130 | DOI Listing |
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