Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/95679
Title: | Impurity-induced robust trionic effect in layered violet phosphorus | Authors: | Li, Y Cai, S Lai, WK Wang, C Rogée, L Zhuang, L Zhai, L Lin, S Li, M Lau, SP |
Issue Date: | 4-Jan-2022 | Source: | Advanced optical materials, 4 Jan. 2022, v. 10, no. 1, 2101538 | Abstract: | Trionic effect is a vital excitonic physical phenomenon, which intensively affects the optical and optoelectronic properties of 2D materials. Violet phosphorus (VP) is another allotrope of elemental phosphorus with robust photoluminescence (PL) emission in the visible range. So far, experimental investigations of the excitonic behavior in VP are quite scarce. Herein, the evolution of the PL mechanism in synthesized VP crystals against the Ar+ plasma exposure is investigated with emphasis on a conversion from trion to exciton emission. The estimated trion binding energy of VP is ≈109 meV, relatively larger than common layered materials. By analyzing the chemical states and the atomic structures, the conversion mechanism is proposed as follows. The Ar+ plasma treatment reduces the stannous Sn-I-P impurities’ population, which are incorporated into the VP lattices and serve as the n-type dopants leading to the trion formation. Besides, various surface defects (POx) can promote the trion-to-exciton conversion by withdrawing electrons from VP in the process and act as hole-trap centers to enhance the photodetection of VP phototransistors. This work reveals that the layered VP crystal can provide an ideal platform to study the excitonic physics and future trionic devices at the 2D limit. | Keywords: | 2D layered materials Phosphorus allotropes Photoluminescence Stannous Sn-I-P impurities Trions Violet phosphorus |
Publisher: | Wiley-VCH | Journal: | Advanced optical materials | EISSN: | 2195-1071 | DOI: | 10.1002/adom.202101538 | Rights: | © 2021 Wiley-VCH GmbH This is the peer reviewed version of the following article: Li, Y., Cai, S., Lai, W. K., Wang, C., Rogée, L., Zhuang, L., ... & Lau, S. P. (2022). Impurity‐Induced Robust Trionic Effect in Layered Violet Phosphorus. Advanced Optical Materials, 10(1), 2101538, which has been published in final form at https://doi.org/10.1002/adom.202101538. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Li_Impurity-Induced_Robust_Trionic.pdf | Pre-Published version | 1.92 MB | Adobe PDF | View/Open |
Page views
79
Last Week
0
0
Last month
Citations as of Oct 13, 2024
Downloads
120
Citations as of Oct 13, 2024
SCOPUSTM
Citations
29
Citations as of Oct 17, 2024
WEB OF SCIENCETM
Citations
27
Citations as of Oct 10, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.