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p‐CuInS 2 /n‐Polymer Semiconductor Heterojunction for Photoelectrochemical Hydrogen Evolution
- Source :
- ChemSusChem. 13:6651-6659
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- An inorganic p-type CuInS2 semiconductor was combined with the semiconducting polymer of PNDI3OT-Se1 and PNDI3OT-Se2 with different HOMO/LUMO levels for photoelectrochemical hydrogen production. Charge transfer behaviors at polymer/CuInS2 junctions were investigated by electrochemical impedance spectroscopy. The heterojunction of p-CuInS2 and n-type polymer (both PNDI3OT-Se1 and Se2) successfully made p-n junctions and showed improved charge transfer. However, we found that higher HOMO levels of polymer than valence band maximum (VBM) of CuInS2 spurred charge recombination at interfaces. As a result, CuInS2 /PNDI3OT-Se1/TiO2 /Pt, which has suitable energy levels matched between PNDI3OT-Se1 and CuInS2 , shows photocurrent (-15.67 mA cm-2 ) improved concretely when compared to a CuInS2 /TiO2 /Pt photoelectrode (-7.11 mA cm-2 ) at 0.0 V vs. RHE applied potential. Additionally, the photoelectrochemical stability of CuInS2 /PNDI3OT-Se1/TiO2 /Pt photoelectrode was also investigated.
- Subjects :
- Photocurrent
Materials science
business.industry
General Chemical Engineering
Analytical chemistry
Heterojunction
02 engineering and technology
Photoelectrochemical cell
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Dielectric spectroscopy
General Energy
Semiconductor
Environmental Chemistry
General Materials Science
0210 nano-technology
p–n junction
business
HOMO/LUMO
Hydrogen production
Subjects
Details
- ISSN :
- 1864564X and 18645631
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- ChemSusChem
- Accession number :
- edsair.doi...........98cf96fa97997abe08763a377f17acc5