The length controllable synthesis and near-infrared photoluminescence of one-dimensional ternary Cu₄Bi₄S₉ semiconductor nanobelts

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• 作者：Jing Li ; Xiaoxu wang ; Ruibin Liu ; Lijie shi ; Muhammad Arshad Kamran ; Haizheng Zhong ; Bingsuo Zou
• 关键词：A. Optical materials ; B. Chemical synthesis ; D. Optical properties
• 刊名：Materials Research Bulletin
• 出版年：January, 2014
• 年：2014
• 卷：49
• 期：Complete
• 页码：180-186
• 全文大小：2594 K

文摘

The ternary Cu-Bi-S based semiconductor with abundant and environmental-friendly elements may provide alternative choice for near-infrared (NIR) light-emitting sources. High-quality copper bismuth sulfide Cu₄Bi₄S₉ (CBS) nanobelts of controllable lengths up to 1 cm were synthesized through a modified solvothermal route by using solvents of varied boiling points (BP) and changing reaction temperatures (RT) to control the competition of efficient collision of Cu₄Bi₄S₉ seeds, intermediate species and precursors and growth of Cu₄Bi₄S₉ nanobelts. Their NIR photoluminescence (PL) of Cu₄Bi₄S₉ nanobelts was firstly observed in the range of 1400-2200 nm, which showed the transition characteristics of mixed direct and indirect-bands nearby. The absorption and PL spectral data could be well accounted for by the ab initio band calculations of Cu₄Bi₄S₉.