摘要
采用水热法合成了尺寸分布均匀,具有八面体形貌的烧绿石相KTaO3纳米材料。室温下,KTaO3纳米材料显示分别位于437 nm、490 nm和569 nm的蓝绿发光峰。位于437 nm处的发光峰可能与自束缚激子的复合有关,而位于490 nm处的发光峰对应于施主-受主对的辐射复合,其热猝灭激活能分别为375 meV和511 meV。
The pyrochlore phase KTaO3 nanomaterials with the octahedral morphologies and uniform size distribution were synthesized by the hydrothermal synthesis method.The blue-green light emission peaks located at 437 nm,490 nm and 569 nm were observed for KTaO3 nanomaterials at room temperature.The emission peak of 437 nm may be related to the combination of the bound exciton,while the peak of 490 nm is related to the radiative recombination of the donor-acceptor pair,which have the thermal quenching activation energy of 375 meV and 511 meV,respectively.
出处
《压电与声光》
CSCD
北大核心
2011年第1期108-110,114,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50902046
50872031)
湖北省自然科学基金资助项目(2009CBD085)
关键词
烧绿石相
KTaO3
纳米材料
光致发光
激活能
pyrochlore phase
KTaO3
nanomaterials
photoluminescence
activation energy
