DUGi: Item | Recercat - Calorimetry of hydrogen desorption from ɑ-Si nanoparticles

Item

Author:	Farjas Silva, Jordi Das, Debabrata Fort, Joaquim Roura Grabulosa, Pere Bertrán Serra, Enric
Abstract:	The process of hydrogen desorption from amorphous silicon (ɑ-Si) nanoparticles grown by plasmaenhanced chemical vapor deposition (PECVD) has been analyzed by differential scanning calorimetry (DSC), mass spectrometry, and infrared spectroscopy, with the aim of quantifying the energy exchanged. Two exothermic peaks centered at 330 and 410 °C have been detected with energies per H atom of about 50 meV. This value has been compared with the results of theoretical calculations and is found to agree with the dissociation energy of Si-H groups of about 3.25 eV per H atom, provided that the formation energy per dangling bond in ɑ-Si is about 1.15 eV. It is shown that this result is valid for ɑ-Si:H films, too
Document access:	http://hdl.handle.net/2072/209775
Language:	eng
Publisher:	American Physical Society
Rights:	Tots els drets reservats
Subject:	Ciència dels materials Materials science Semiconductors amorfs Amorphous semiconductors Capes fines Thin films Materials nanoestructurals Nanostructure materials
Title:	Calorimetry of hydrogen desorption from ɑ-Si nanoparticles
Type:	info:eu-repo/semantics/article
Repository:	Recercat