This paper presents the experimental results of laser-induced phase changes in chemically bath deposited (CBD) Sb2S3 films on fused silica glass substrates. The CBD allows conformal coverage of the glass substrate with surface roughness of 21.8 nm as estimated from AFM. As deposited Sb2S3 films show an amorphous-like structure as was revealed by both green laser (λex=514 nm) Raman and FT Raman (λex=1064 nm) spectroscopy. Optical transmittance indicates that the absorption edge in Sb2S3 films is 550 nm and therefore light below this wavelength will be strongly absorbed. Above certain threshold power, 2mW, of green laser (λex=514 nm) we observe that we can trigger an amorphous to crystalline phase transition in Sb2S3 films. Following this transition, we have also observed the appearance of α-Sb2O3 and the metallic Sb in the Sb2S3 films. The changes in optical properties have been investigated by spectroscopic ellipsometry.

Chemically Bath Deposited Sb2S3 Films as Optical Phase Change Materials

Gutierrez, Yael;Losurdo, Maria
2021

Abstract

This paper presents the experimental results of laser-induced phase changes in chemically bath deposited (CBD) Sb2S3 films on fused silica glass substrates. The CBD allows conformal coverage of the glass substrate with surface roughness of 21.8 nm as estimated from AFM. As deposited Sb2S3 films show an amorphous-like structure as was revealed by both green laser (λex=514 nm) Raman and FT Raman (λex=1064 nm) spectroscopy. Optical transmittance indicates that the absorption edge in Sb2S3 films is 550 nm and therefore light below this wavelength will be strongly absorbed. Above certain threshold power, 2mW, of green laser (λex=514 nm) we observe that we can trigger an amorphous to crystalline phase transition in Sb2S3 films. Following this transition, we have also observed the appearance of α-Sb2O3 and the metallic Sb in the Sb2S3 films. The changes in optical properties have been investigated by spectroscopic ellipsometry.
2021
Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia - ICMATE
Istituto di Nanotecnologia - NANOTEC
AFM
Chemical bath deposition
phase change material
Raman spectroscopy
Sb2S3
spectroscopic ellipsometry
File in questo prodotto:
File Dimensione Formato  
2021 - Cobianu et al - Chemically Bath Deposited Sb2S3 Films...[Losurdo].pdf

solo utenti autorizzati

Descrizione: Paper
Tipologia: Versione Editoriale (PDF)
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 1.14 MB
Formato Adobe PDF
1.14 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/526723
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 4
social impact