Abstract Cesium tungsten bronze (CsxWO3) has potential applications in the field of energy-saving window glasses due to its visible light transparency and near-infrared (NIR) shielding ability. In order to further improve the NIR shielding performance and realize low-cost large-scale production of tungsten bronze, in this work, K, Cs co-doped tungsten bronze (KmCsnWO3, m + n = 0.32) were fabricated by facile solid-state reaction method. It has been clarified that K, Cs co-doping could promote the formation of W5+ and thus enhance the localized surface plasmon resonance (LSPR). Moreover, the K, Cs co-doping is conducive to the formation of single or double bond between W5+ and O, and the double bond W5+=O can increase the strength of small polaron effect and greatly improve the NIR shielding at wavelength 730–1100 nm. Particularly, when K:Cs (mol) = 0.2:0.8, the maximum visible light transmittance of 66.89% and near-infrared shielding rate of 98.25% could be achieved respectively. This work is of great significance for developing CsxWO3 tungsten bronze with improved NIR shielding performance and realizing its industrial production and practical applications in the field of energy-saving windows.

中文翻译：

---

基于 W5+ 诱导的小极化子和局部表面等离子体共振 (LSPR) 调制的 KmCsnWO3 的轻松制造，大大提高了近红外屏蔽效率

摘要 铯钨青铜（CsxWO3）由于具有可见光透明性和近红外（NIR）屏蔽能力，在节能窗玻璃领域具有潜在的应用前景。为了进一步提高近红外屏蔽性能，实现钨青铜的低成本规模化生产，本工作采用简便的固态方法制备了K、Cs共掺杂钨青铜（KmCsnWO3，m+n=0.32）。反应法。已经阐明K，Cs共掺杂可以促进W5+的形成，从而增强局域表面等离子体共振（LSPR）。此外，K、Cs共掺杂有利于W5+和O之间形成单键或双键，双键W5+=O可以增加小极化子效应的强度，大大提高对730-1100波长的NIR屏蔽纳米。特别是，当 K：Cs (mol) = 0.2:0.8，可见光最大透过率可达66.89%，近红外屏蔽率可达98.25%。该工作对于开发具有改进近红外屏蔽性能的CsxWO3钨青铜，实现其在节能窗领域的工业化生产和实际应用具有重要意义。