Phonon Line Emission Revealed by Self-Assembly of Colloidal Nanoplatelets

被引：92

作者：

Tessier, Mickael D. ^{[1
]}

Biadala, Louis ^{[1
]}

Bouet, Cecile ^{[1
]}

Ithurria, Sandrine ^{[1
]}

Abecassis, Benjamin ^{[2
]}

Dubertret, Benoit ^{[1
]}

机构：

[1] Univ Paris 06, Lab Phys & Etud Mat, CNRS, ESPCI, F-75005 Paris, France

[2] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France

来源：

ACS NANO | 2013年 / 7卷 / 04期

关键词：

quantum well; self-assembling; collective properties; nanocrystals; photoluminescence; phonon; polaron; CDSE QUANTUM DOTS; TEMPERATURE-DEPENDENCE; SPECTROSCOPY; NANOCRYSTALS; ABSORPTION; RESONANCE;

D O I：

10.1021/nn400833d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We show that colloidal nanoplatelets can self-assemble to form a 1D superlattice. When self-assembled, an additional emission line appears in the photoluminescence spectrum at low temperatures. This emission line is a collective effect, greatly enhanced when the NPLs are self-assembled. It is attributed to the longitudinal optical (LO) phonon replica of the band-edge exciton, and its presence in self-assembled nanoplatelets is explained using a model based on an efficient photons reabsorption between neighboring nanoplatelets. The presence of phonon replica at low temperatures in ensemble measurements suggests the possibility to design a laser, based on self-assembled nanoplatelets.

引用

页码：3332 / 3340

页数：9

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