Lithium Tin Sulfide—a High‐Refractive‐Index 2D Material for Humidity‐Responsive Photonic Crystals,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Lithium Tin Sulfide—a High‐Refractive‐Index 2D Material for Humidity‐Responsive Photonic Crystals
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-01-15 , DOI: 10.1002/adfm.201705740
Katalin Szendrei-Temesi _{1,

2,

3} , Olalla Sanchez-Sobrado ₄ , Sophia B. Betzler _{1,

2,

3} , Katharina M. Durner ₂ , Tanja Holzmann _{1,

2,

3} , Bettina V. Lotsch _{1,

2,

3}

Affiliation

Extending the portfolio of novel stimuli‐responsive, high‐refractive‐index (RI) materials besides titania is key to improve the optical quality and sensing performance of existing photonic devices. Herein, lithium tin sulfide (LTS) nanosheets are introduced as a novel solution processable ultrahigh RI material (n = 2.50), which can be casted into homogeneous thin films using wet‐chemical deposition methods. Owing to its 2D morphology, thin films of LTS nanosheets are able to swell in response to changes of relative humidity. Integration of LTS nanosheets into Bragg stacks (BSs) based on TiO₂, SiO₂, nanoparticles or H₃Sb₃P₂O₁₄ nanosheets affords multilayer systems with high optical quality at an extremely low device thickness of below 1 µm. Owing to the ultrahigh RI of LTS nanosheets and the high transparency of the thin films, BSs based on porous titania as the low‐RI material are realized for the first time, showing potential application in light‐managing devices. Moreover, the highest RI contrast ever realized in BSs based on SiO₂ and LTS nanosheets is reported. Finally, exceptional swelling capability of an all‐nanosheet BS based on LTS and H₃Sb₃P₂O₁₄ nanosheets is demonstrated, which bodes well for a new generation of humidity sensors with extremely high sensitivity.

中文翻译：

硫化锂锡-一种用于湿敏光子晶体的高折射率二维材料

除了二氧化钛以外，扩展新颖的刺激响应，高折射率（RI）材料的产品组合对于提高现有光子设备的光学质量和传感性能至关重要。在这里，介绍了一种新型的可溶液加工的超高RI材料（n = 2.50），它是一种可以进行溶液加工的新型锂锡硫化物（LTS）纳米片，可以使用湿化学沉积方法将其浇铸成均匀的薄膜。由于其2D形态，LTS纳米片的薄膜能够响应相对湿度的变化而膨胀。将LTS纳米片集成到基于TiO ₂，SiO ₂，纳米粒子或H ₃ Sb ₃ P ₂ O _14的布拉格堆叠中纳米片以低于1 µm的极低器件厚度提供了具有高光学质量的多层系统。由于LTS纳米片的超高RI和薄膜的高透明性，首次实现了基于多孔二氧化钛作为低RI材料的BS，显示了其在光管理设备中的潜在应用。此外，据报道，在基于SiO ₂和LTS纳米片的BS中实现了最高的RI对比度。最后，展示了基于LTS和H ₃ Sb ₃ P ₂ O ₁₄纳米片的全纳米片BS的卓越溶胀能力，这对于具有极高灵敏度的新一代湿度传感器来说是一个好兆头。

更新日期：2018-01-15

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11