Influence of Alloying on the Optical Properties of IV–VI Nanorods
Influence of Alloying on the Optical Properties of IV–VI Nanorods
复制标题
合金化对 IV-VI 纳米棒光学性能的影响
DOI：
10.1021/jp303200b
复制
发表时间：
2012
影响因子：
3.7
通讯作者：
E. Lifshitz
中科院分区：
文献类型：
--
作者：
Anna Rubin;Georgy I. Maikov;D. Kolan;R. Vaxenburg;Jenya Tilchin;Y. Kauffmann;A. Sashchiuk;E. Lifshitz
报道了PbSexS 1-x和PbSe/PbSexS 1-x纳米棒的合成、结构和光学特性，其直径在2 ~ 4.5 nm之间，长度在10 ~ 38 nm之间。纳米棒的能带隙在直径和组成的变化时表现出明显的变化，对超过10 nm的长度的影响较小。纳米棒的光致发光光谱由主带组成，在高温下伴随着卫星带。的主导带示出了一个非常小的带隙温度系数和可以忽略不计的延长在低温下的辐射寿命相比，在PbSe纳米棒和PbSexS 1-x量子点具有类似的带隙能量的光致发光过程。一个理论模型表明，发生独立的过渡从一对带边谷，位于L点的布里渊区，有关的主导和卫星发射过程。每个谷是四重简并的，并具有一个相对的。
The synthesis and structural and optical characterization of PbSexS1–x and PbSe/PbSexS1–x nanorods with a diameter between 2 and 4.5 nm and a length of 10 to 38 nm is reported. The energy band gap of the nanorods exhibits a pronounced variation upon the change in diameter and composition, with a minor influence on lengths beyond 10 nm. The photoluminescence spectrum of the nanorods is composed of a dominant band, accompanied by a satellite band at elevated temperatures. The dominant band shows an exceptionally small band gap temperature coefficient and negligible extension of the radiative lifetime at cryogenic temperatures compared with the photoluminescence processes in PbSe nanorods and in PbSexS1–x quantum dots with similar band gap energy. A theoretical model suggests the occurrence of independent transitions from a pair of band-edge valleys, located at the L points of Brillouin zone, related to the dominant and satellite emission processes. Each valley is four-fold degenerate and possesses a relativ...
影响因子：
15
作者：
Bailey, RE;Nie, SM
通讯作者：
Nie, SM
影响因子：
15
作者：
Allen, Peter M.;Liu, Wenhao;Chauhan, Vikash P.;Lee, Jungmin;Ting, Alice Y.;Fukumura, Dai;Jain, Rakesh K.;Bawendi, Moungi G.
通讯作者：
Bawendi, Moungi G.