Web of Science: 21 citations, Scopus: 21 citations, Google Scholar: citations,
Charge transfer characterization of ALD-Grown TiO₂ protective layers in silicon photocathodes
Ros, Carles (Institut de Recerca en Energia de Catalunya)
Andreu, Teresa (Institut de Recerca en Energia de Catalunya)
Hernández-Alonso, María Dolores (Repsol Technology Center)
Penelas-Pérez, Germán (Repsol Technology Center)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Morante, Joan R. (Universitat de Barcelona)

Date: 2017
Abstract: A critical parameter for the implementation of standard high-efficiency photovoltaic absorber materials for photoelectrochemical (PEC) water splitting is its proper protection from chemical corrosion while remaining transparent and highly conductive. Atomic layer deposited (ALD) TiO₂ layers fulfill material requirements while conformally protecting the underlying photoabsorber. Nanoscale conductivity of ALD TiO₂ protective layers on silicon based photocathodes has been analyzed, proving that the conduction path is through the columnar crystalline structure of TiO₂. Deposition temperature has been explored from 100 to 300 ºC, and a temperature threshold is found to be mandatory for an efficient charge transfer, as a consequence of layer crystallization between 100 and 200 ºC. Completely crystallized TiO₂ is demonstrated to be mandatory for long term stability, as seen in the 300 h continuous operation test.
Note: Número d'acord de subvenció AGAUR/2014/SGR-1638
Note: Número d'acord de subvenció MINECO/MAT2014-59961-C2
Note: Número d'acord de subvenció MINECO/BES-2015-071618
Note: Número d'acord de subvenció MINECO/ENE2016-80788-C5-5-R
Note: Número d'acord de subvenció MINECO/SEV-2013-0295
Rights: Tots els drets reservats.
Language: Anglès.
Document: article ; recerca ; acceptedVersion
Subject: Atomic layer deposition ; PEC cells ; Protecting overlayers ; Silicon ; Solar hydrogen production ; Titanium dioxide ; Water splitting
Published in: ACS Applied Materials and Interfaces, Vol. 9, Issue 21 (May 2017) , p. 17932-17941, ISSN 1944-8252

DOI: 10.1021/acsami.7b02996


Post-print
34 p, 4.9 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2018-07-25, last modified 2019-03-29



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