摘要
光子上转换是吸收低能量(长波长)的光发射高能量(短波长)光的过程,在太阳能光伏、光催化等领域具有潜在应用价值而受到广泛研究,然而通常介质采用有机溶剂及绝氧处理都大大限制了上转换的实际应用。本文报道了可用于三线态湮灭上转换过程的新介质—O/W型微乳液,该体系制备简单、无毒环保,无需除氧脱气条件下,上转化发光稳定,具有未来实际应用的潜力。
The triplet-triplet annihilated upconversion （TTA-UC） is one of hotspot researches on the pho- ton-upconversion mechanism, due to TTA-UC can be obtained at low excitation intensity and would bring about many practical applications such as photovoltaics and photocatalysis. However, the application of TTA-UC is facing the limitation because it relies exclusively on the efficient generation of the triplet excited states of both sensitizer and acceptor. Dissolved 02 can strongly annihilate these formed triplets. So the conventional organic solvent served as the upconversion medium must he devoid of oxygen to prevent triplet-state quenching, which is absolutely not ideal for the most TTA-UC applications. In this paper, we reported a new medium for triplet-triplet annihilated upconversion, that is, the oil-in-water （o/w） microemulsion without degassing any more. There is no need for the upconverted o/w microemulsion to deaerate, which is of critical importance for the TTA-UC application
出处
《信息记录材料》
2014年第6期21-26,共6页
Information Recording Materials
基金
江苏省自然科学基金(BK2013026)
江苏省环境功能材料重点实验室开放基金资助(SJHG1311)
苏州市应用基础研究计划(SYG201204)
关键词
弱光
上转换
三线态-三线态湮灭
微乳液
low-power
upconversion
triplet-triplet annihilated
microemulsion
