skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Improved Stability and Performance of Visible Photoelectrochemical Water Splitting on Solution-Processed Organic Semiconductor Thin Films by Ultrathin Metal Oxide Passivation

Journal Article · · Chemistry of Materials
 [1];  [2]; ORCiD logo [3];  [1];  [3]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [2]
  1. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering
  2. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division

Solution-processable organic semiconductors have potentials as visible photoelectrochemical (PEC) water splitting photoelectrodes due to their tunable small band gap and electronic energy levels, but they are typically limited by poor stability and photocatalytic activity. In this study, we demonstrate the direct visible PEC water oxidation on solution-processed organic semiconductor thin films with improved stability and performance by ultrathin metal oxide passivation layers. N-type fullerene-derivative thin films passivated by sub-2 nm ZnO via atomic layer deposition enabled the visible PEC water oxidation at wavelengths longer than 600 nm in harsh alkaline electrolyte environments with up to 30 μA/cm2 photocurrents at the thermodynamic water-oxidation equilibrium potential and the photoanode half-lifetime extended to ~1000 s. The systematic investigation reveals the enhanced water oxidation catalytic activity afforded by ZnO passivation and the charge tunneling governing the hole transfer through passivation layers. Further enhanced PEC performances were realized by improving the bottom ohmic contact to the organic semiconductor, achieving ~60 μA/cm2 water oxidation photocurrent at the equilibrium potential, the highest values reported for organic semiconductor thin films to our knowledge. The improved stability and performance of passivated organic photoelectrodes and discovered design rationales provide useful guidelines for realizing the stable visible solar PEC water splitting based on organic semiconductor thin films.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1430867
Report Number(s):
BNL-203414-2018-JAAM; TRN: US1802761
Journal Information:
Chemistry of Materials, Vol. 30, Issue 2; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

References (42)

Solar Water Splitting Cells journal November 2010
Recent advances in semiconductors for photocatalytic and photoelectrochemical water splitting journal January 2014
Review of photocatalytic water-splitting methods for sustainable hydrogen production: Review: photocatalysis for sustainable hydrogen journal May 2016
Heterogeneous photocatalyst materials for water splitting journal January 2009
Photocatalytic Water Splitting: Recent Progress and Future Challenges journal September 2010
Electrochemical Photolysis of Water at a Semiconductor Electrode journal July 1972
A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water Splitting journal April 1998
Semiconductor nanostructure-based photoelectrochemical water splitting: A brief review journal May 2011
Single-Crystal Semiconductors with Narrow Band Gaps for Solar Water Splitting journal July 2015
Energy Conversion in Natural and Artificial Photosynthesis journal May 2010
Development of Visible Light-Responsive Sensitized Photocatalysts journal January 2012
Doping in ZnSe, ZnTe, MgSe, and MgTe wide-band-gap semiconductors journal January 1994
Novel Carbon-Doped TiO 2 Nanotube Arrays with High Aspect Ratios for Efficient Solar Water Splitting journal January 2006
A review and recent developments in photocatalytic water-splitting using TiO2 for hydrogen production journal April 2007
Recent Advances in the BiVO4 Photocatalyst for Sun-Driven Water Oxidation: Top-Performing Photoanodes and Scale-Up Challenges journal January 2017
Nanonet-Based Hematite Heteronanostructures for Efficient Solar Water Splitting journal March 2011
Nanoporous BiVO4 Photoanodes with Dual-Layer Oxygen Evolution Catalysts for Solar Water Splitting journal February 2014
Organic solar cells: An overview journal July 2004
Organic solar cells with carbon nanotube network electrodes journal June 2006
Organic solar cells with solution-processed graphene transparent electrodes journal June 2008
Organic semiconductor for artificial photosynthesis: water splitting into hydrogen by a bioinspired C 3 N 3 S 3 polymer under visible light irradiation journal January 2011
Polymer solar cells journal February 2012
Semiconducting materials for photoelectrochemical energy conversion journal January 2016
Photoassisted Overall Water Splitting in a Visible Light-Absorbing Dye-Sensitized Photoelectrochemical Cell
  • Youngblood, W. Justin; Lee, Seung-Hyun Anna; Kobayashi, Yoji
  • Journal of the American Chemical Society, Vol. 131, Issue 3, p. 926-927 https://doi.org/10.1021/ja809108y
journal January 2009
Metal-free organic sensitizers for use in water-splitting dye-sensitized photoelectrochemical cells journal January 2015
Visible-Light Photooxidation of Water to Oxygen at Hybrid TiO2-Polyheptazine Photoanodes with Photodeposited Co-Pi (CoOx) Cocatalyst journal April 2012
Organic Dye-Sensitized Tandem Photoelectrochemical Cell for Light Driven Total Water Splitting journal July 2015
Visible-Light-Assisted Photoelectrochemical Water Oxidation by Thin Films of a Phosphonate-Functionalized Perylene Diimide Plus CoO x Cocatalyst journal March 2014
Direct Light-Driven Water Oxidation by a Ladder-Type Conjugated Polymer Photoanode journal December 2015
An Organic Photoelectrode Working in the Water Phase: Visible-Light-Induced Dioxygen Evolution by a Perylene Derivative/Cobalt Phthalocyanine Bilayer journal April 2006
Wide visible light-induced dioxygen evolution at an organic photoanode coated with a noble metal oxide catalyst journal February 2006
Photo-electrochemical water splitting system with three-layer n-type organic semiconductor film as photoanode under visible irradiation journal December 2011
Enhancing Water Splitting Activity and Chemical Stability of Zinc Oxide Nanowire Photoanodes with Ultrathin Titania Shells journal June 2013
Atomic layer-deposited tunnel oxide stabilizes silicon photoanodes for water oxidation journal June 2011
Enhanced Stability and Activity for Water Oxidation in Alkaline Media with Bismuth Vanadate Photoelectrodes Modified with a Cobalt Oxide Catalytic Layer Produced by Atomic Layer Deposition journal November 2013
Improved Stability of Polycrystalline Bismuth Vanadate Photoanodes by Use of Dual-Layer Thin TiO 2 /Ni Coatings journal August 2014
Tandem polymer solar cells featuring a spectrally matched low-bandgap polymer journal February 2012
Experimental investigation on the kinetics of catalytic recombination of hydrogen with oxygen in air journal October 2014
Oxygen reduction on platinum electrodes in base: Theoretical study journal December 2007
Hydrothermal growth of ZnO nanowire arrays: fine tuning by precursor supersaturation journal January 2017
Two Electrode Collector–Generator Method for the Detection of Electrochemically or Photoelectrochemically Produced O 2 journal July 2016
Oxygen reduction at electrodeposited ZnO layers in alkaline solution journal November 2016

Cited By (4)

Organic Semiconductor Based Devices for Solar Water Splitting journal October 2018
Carbon Nitride/Reduced Graphene Oxide Film with Enhanced Electron Diffusion Length: An Efficient Photo-Electrochemical Cell for Hydrogen Generation journal May 2018
High performance photoanodic catalyst prepared from an active organic photovoltaic cell – high potential gain from visible light journal January 2019
Controlled Surface Modification of ZnO Nanostructures with Amorphous TiO 2 for Photoelectrochemical Water Splitting journal June 2019

Figures / Tables (12)