---
res:
  bibo_abstract:
  - Light-assisted metal oxide-based chemiresistive gas sensors are widely explored
    for operation at relatively low temperatures, yet the investigation of the role
    of irradiance, as opposed to wavelength, remains underrepresented. Here, we systematically
    quantify the irradiance-dependent behavior of ordered mesoporous In2O3 under visible
    light illumination. Photoconductivity measurements reveal two distinct irradiance
    regimes consistent with trap-limited transport at low power and recombination-
    or saturation-limited transport at high power. Gas sensing experiments towards
    CO and H2 show a pronounced non-monotonic response, reaching maximum responses
    of 0.74 for 135 ppm CO at 67 mW cm−2 and 0.64 for 90 ppm H2 at 11 mW cm−2, followed
    by strong suppression at higher irradiance. Illumination also accelerated the
    response kinetics. At 60 ppm, t90 decreases from 96 to 12 s for CO and 141 to
    27 s for H2, corresponding to an 8- and 5-fold faster response time, respectively.
    Near-ambient pressure-XPS under controlled atmosphere and density functional theory
    calculations indicate defect-mediated excitation. Oxygen vacancy states and illumination-induced
    modification of surface oxygen species govern this behavior. The results establish
    irradiance as a critical mechanistic parameter that determines whether In2O3 operates
    in a surface-controlled or bulk photoconductive regime. These findings highlight
    the need to explicitly optimize and report irradiance in illuminated gas sensor
    studies, and not only the power consumption of the light source.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Sven
      foaf_name: Voth, Sven
      foaf_surname: Voth
  - foaf_Person:
      foaf_givenName: Zhenyu
      foaf_name: Zhao, Zhenyu
      foaf_surname: Zhao
  - foaf_Person:
      foaf_givenName: Dominik
      foaf_name: Baier, Dominik
      foaf_surname: Baier
  - foaf_Person:
      foaf_givenName: Alexandra
      foaf_name: Glass, Alexandra
      foaf_surname: Glass
  - foaf_Person:
      foaf_givenName: Hossam
      foaf_name: Elgabarty, Hossam
      foaf_surname: Elgabarty
      foaf_workInfoHomepage: http://www.librecat.org/personId=60250
    orcid: 0000-0002-4945-1481
  - foaf_Person:
      foaf_givenName: Oskar J.
      foaf_name: Sandberg, Oskar J.
      foaf_surname: Sandberg
  - foaf_Person:
      foaf_givenName: Guido
      foaf_name: Grundmeier, Guido
      foaf_surname: Grundmeier
      foaf_workInfoHomepage: http://www.librecat.org/personId=194
  - foaf_Person:
      foaf_givenName: Michael
      foaf_name: Tiemann, Michael
      foaf_surname: Tiemann
      foaf_workInfoHomepage: http://www.librecat.org/personId=23547
    orcid: 0000-0003-1711-2722
  - foaf_Person:
      foaf_givenName: Jan-Henrik
      foaf_name: Smått, Jan-Henrik
      foaf_surname: Smått
  - foaf_Person:
      foaf_givenName: Nicklas
      foaf_name: Anttu, Nicklas
      foaf_surname: Anttu
  - foaf_Person:
      foaf_givenName: Teresa
      foaf_name: de los Arcos, Teresa
      foaf_surname: de los Arcos
  - foaf_Person:
      foaf_givenName: Christian
      foaf_name: Weinberger, Christian
      foaf_surname: Weinberger
      foaf_workInfoHomepage: http://www.librecat.org/personId=11848
  bibo_doi: 10.1021/acssensors.6c01100
  dct_date: 2026^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/2379-3694
  - http://id.crossref.org/issn/2379-3694
  dct_language: eng
  dct_publisher: American Chemical Society (ACS)@
  dct_subject:
  - resistive gas sensing
  - indium oxide
  - photoactivation
  - irradiance
  - photoconductivity
  - charge carrier dynamics
  - oxygen vacancies
  dct_title: 'Role of Irradiance in Light-Activated In<sub>2</sub>O<sub>3</sub>Gas
    Sensors: Why More Light Is Not Always Better@'
...