Lattice Dynamics and Thermal Stability of Cubic-Phase CsPbI3 Quantum Dots
文献类型：期刊论文
| 作者 | Wei Zhou; Fan Sui; Guohua Zhong; Guanming Cheng; Mingyue Pan; Chunlei Yang; Shuangchen Ruan |
| 刊名 | The Journal of Physical Chemistry Letters
 |
| 出版日期 | 2018 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Cubic-phase CsPbI3 quantum dots (QDs) have been recently synthesized with merits of excellent optoelectronic performance. However, vital properties of cubic CsPbI3 including lattice dynamics and stability at high temperature remain poorly explored. We fabricate cubic CsPbI3 QDs and study their lattice dynamic and thermal stability to 700 K. We obtain Raman modes of cubic CsPbI3 QDs from 300 to 500 K at ultra-low-frequency range down to 15 cm−1, consistent with first-principles calculations. Above 550 K, the modification of Raman features suggests sample degradation. Consistently, temperaturedependent photoluminescence measurements indicate the absence of other luminescence phases up to 700 K. With increasing temperature, the CsPbI3 QD photoluminescence peak has a blue shift with exponentially decreasing intensity, showing faster electronic degradation than structural degradation. Our work provides detailed investigation of CsPbI3 QD lattice dynamics, band gap, and their high-temperature behavior, potentially useful for their emerging optoelectronic applications. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/13480]  |
| 专题 | 深圳先进技术研究院_集成所 |
| 推荐引用方式 GB/T 7714 | Wei Zhou,Fan Sui,Guohua Zhong,et al. Lattice Dynamics and Thermal Stability of Cubic-Phase CsPbI3 Quantum Dots[J]. The Journal of Physical Chemistry Letters,2018. |
| APA | Wei Zhou.,Fan Sui.,Guohua Zhong.,Guanming Cheng.,Mingyue Pan.,...&Shuangchen Ruan.(2018).Lattice Dynamics and Thermal Stability of Cubic-Phase CsPbI3 Quantum Dots.The Journal of Physical Chemistry Letters. |
| MLA | Wei Zhou,et al."Lattice Dynamics and Thermal Stability of Cubic-Phase CsPbI3 Quantum Dots".The Journal of Physical Chemistry Letters (2018). |
入库方式： OAI收割
来源：深圳先进技术研究院
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