Issue 13, 2016

Geometry strategy for engineering the recombination possibility of excitons in nanowires

Abstract

We proposed a geometry strategy to engineer the radiative recombination possibility and thus the lifetime of excitons in nanowires of some photovoltaic semiconductors by using theoretical analysis and first-principles calculations. We demonstrated that the shape can engineer the symmetry of the wave-functions of band-edge states and influence the radiative recombination possibility. The nanowires need to satisfy the following requirements to forbid the radiative recombination possibility of band-edge excitons: (i) wurtzite structure; (ii) pxy-characterized wave-function of VBM state and (iii) C3v-symmetry shape. The geometrical symmetry results in the pxy-characterized C3v-symmetry wave-function of VBM state and leads to forbidden radiative recombination of band-edge excitons. The geometry strategy offers a flexible proposal to prolong the exciton lifetime, leaving optical absorption impregnable.

Graphical abstract: Geometry strategy for engineering the recombination possibility of excitons in nanowires

Article information

Article type
Paper
Submitted
16 12月 2015
Accepted
02 3月 2016
First published
03 3月 2016

Nanoscale, 2016,8, 7318-7325

Geometry strategy for engineering the recombination possibility of excitons in nanowires

Y. Wang, Y. Zhang, H. Zhu, J. Liu, T. Lian and W. Zhang, Nanoscale, 2016, 8, 7318 DOI: 10.1039/C5NR08934D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements