Crystalline/amorphous tungsten oxide core/shell hierarchical structures and their synergistic effect for optical modulation

详细信息    查看全文

• 作者：D. Zhou^a ; D. Xie^a ; F. Shi^a ; D.H. Wang^a ; X. Ge^a ; X.H. Xia^a ; ^b ; X.L. Wang^a ; ^b ; C.D. Gu^a ; ^b ; J.P. Tu^a ; ^b ; ^{tujp@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{tujplab@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Electrochromism ; Tungsten trioxide ; Crystalline nanowire ; Amorphous layer ; Core/shell structure
• 刊名：Journal of Colloid and Interface Science
• 出版年：2015
• 出版时间：15 December 2015
• 年：2015
• 卷：460
• 期：Complete
• 页码：200-208
• 全文大小：3249 K

文摘

High-performance electrochromic films with large color contrast and fast switching speed are of great importance for developing advanced smart windows. In this work, crystalline/amorphous WO₃ core/shell (c-WO₃@a-WO₃) nanowire arrays rationally are synthesized by combining hydrothermal and electrodeposition methods. The 1D c-WO₃@a-WO₃ core/shell hierarchical structures show a synergistic effect for the enhancement of optical modulation, especially in the infrared (IR) region. By optimizing the electrodeposition time of 400 s, the core/shell array exhibits a significant optical modulation (70.3% at 750 nm, 42.0% at 2000 nm and 51.4% at 10 渭m), fast switching speed (3.5 s and 4.8 s), high coloration efficiency (43.2 cm² C⁻¹ at 750 nm) and excellent cycling performance (68.5% after 3000 cycles). The crystalline/amorphous nanostructured film can provide an alternative way for developing high-performance electrochromic materials.