Excitons in 2D perovskites for ultrafast terahertz photonic devices
Kumar, Abhishek ; Solanki, Ankur ; Manjappa, Manukumara ; Ramesh, Sankaran LU
; Srivastava, Yogesh Kumar
; Agarwal, Piyush
; Sum, Tze Chien
and Singh, Ranjan
(2020)
In Science Advances
6(8).
- Abstract
In recent years, two-dimensional (2D) Ruddlesden-Popper perovskites have emerged as promising candidates for environmentally stable solar cells, highly efficient light-emitting diodes, and resistive memory devices. The remarkable existence of self-assembled quantum well (QW) structures in solution-processed 2D perovskites offers a diverse range of optoelectronic properties, which remain largely unexplored. Here, we experimentally observe ultrafast relaxation of free carriers in 20 ps due to the quantum confinement of free carriers in a self-assembled QW structures that form excitons. Furthermore, hybridizing the 2D perovskites with metamaterials on a rigid and a flexible substrate enables modulation of terahertz fields at 50-GHz... (More)
In recent years, two-dimensional (2D) Ruddlesden-Popper perovskites have emerged as promising candidates for environmentally stable solar cells, highly efficient light-emitting diodes, and resistive memory devices. The remarkable existence of self-assembled quantum well (QW) structures in solution-processed 2D perovskites offers a diverse range of optoelectronic properties, which remain largely unexplored. Here, we experimentally observe ultrafast relaxation of free carriers in 20 ps due to the quantum confinement of free carriers in a self-assembled QW structures that form excitons. Furthermore, hybridizing the 2D perovskites with metamaterials on a rigid and a flexible substrate enables modulation of terahertz fields at 50-GHz modulating speed, which is the fastest for a solution-processed semiconductor-based photonic device. Hence, an exciton-based ultrafast response of 2D perovskites opens up large avenues for a wide range of scalable dynamic photonic devices with potential applications in flexible photonics, ultrafast wavefront control, and short-range wireless terahertz communications.
(Less)
- author
- Kumar, Abhishek
; Solanki, Ankur
; Manjappa, Manukumara
; Ramesh, Sankaran
LU
; Srivastava, Yogesh Kumar
; Agarwal, Piyush
; Sum, Tze Chien
and Singh, Ranjan
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Science Advances
- volume
- 6
- issue
- 8
- article number
- eaax8821
- publisher
- American Association for the Advancement of Science (AAAS)
- external identifiers
-
- pmid:32128397
- scopus:85079596863
- ISSN
- 2375-2548
- DOI
- 10.1126/sciadv.aax8821
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: Copyright © 2020 The Authors,
- id
- 6e5cc395-3ecf-4447-b93d-658c1307901b
- date added to LUP
- 2023-02-15 22:17:36
- date last changed
- 2025-01-26 01:18:41
@article{6e5cc395-3ecf-4447-b93d-658c1307901b,
abstract = {{<p>In recent years, two-dimensional (2D) Ruddlesden-Popper perovskites have emerged as promising candidates for environmentally stable solar cells, highly efficient light-emitting diodes, and resistive memory devices. The remarkable existence of self-assembled quantum well (QW) structures in solution-processed 2D perovskites offers a diverse range of optoelectronic properties, which remain largely unexplored. Here, we experimentally observe ultrafast relaxation of free carriers in 20 ps due to the quantum confinement of free carriers in a self-assembled QW structures that form excitons. Furthermore, hybridizing the 2D perovskites with metamaterials on a rigid and a flexible substrate enables modulation of terahertz fields at 50-GHz modulating speed, which is the fastest for a solution-processed semiconductor-based photonic device. Hence, an exciton-based ultrafast response of 2D perovskites opens up large avenues for a wide range of scalable dynamic photonic devices with potential applications in flexible photonics, ultrafast wavefront control, and short-range wireless terahertz communications.</p>}},
author = {{Kumar, Abhishek and Solanki, Ankur and Manjappa, Manukumara and Ramesh, Sankaran and Srivastava, Yogesh Kumar and Agarwal, Piyush and Sum, Tze Chien and Singh, Ranjan}},
issn = {{2375-2548}},
language = {{eng}},
number = {{8}},
publisher = {{American Association for the Advancement of Science (AAAS)}},
series = {{Science Advances}},
title = {{Excitons in 2D perovskites for ultrafast terahertz photonic devices}},
url = {{http://dx.doi.org/10.1126/sciadv.aax8821}},
doi = {{10.1126/sciadv.aax8821}},
volume = {{6}},
year = {{2020}},
}