Investigation of the Photophysical and Electrical Characteristics of CuInS2 QDs/SWCNT Hybrid Nanostructure

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• 作者：Razi Ahmad ; Udit Soni ; Ritu Srivastava ; Vidya Nand Singh ; Suresh Chand ; Sameer Sapra
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：May 29, 2014
• 年：2014
• 卷：118
• 期：21
• 页码：11409-11416
• 全文大小：513K
• 年卷期：v.118,no.21(May 29, 2014)
• ISSN：1932-7455

文摘

A novel photoactive hybrid nanostructure based on zero-dimensional (0-D) light-harvesting components of CuInS₂ quantum dots (QDs) and one-dimensional (1-D) transporting channel of single-wall carbon nanotube (SWCNT) was synthesized by hydrophobic interaction between alkyl chain of dodecanethiol molecule (QDs surface) and octadecylamine (CNT surface). Photophysical and electrical characterizations suggest that an efficient electron transfer from photoexcited CIS QDs to SWCNT takes place. Furthermore, size-dependent optical study shows that faster electron transfer takes place from CIS to SWCNT for small-size QDs compared to large-size quantum dots. The rate constant for electron transfer from photoexcited CIS to SWCNT increased from 1.9 脳 10⁶ to 3.5 脳 10⁶ s^鈥? with decrease in the size of CIS QDs from 5.0 to 3.5 nm.