Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.

Efficient Solar-driven Hydrogen Generation Using Colloidal Heterostructured Quantum Dots


Mesoporous TiO2 sensitized with colloidal quantum dots (QDs) is considered as a promising system for photoelectrochemical (PEC) hydrogen generation, in view of its low cost and high solar energy to fuel conversion efficiency. On the other hand, the limited long term stability and low current density of this system still hinder its commercialization. Here, we report a CdSe/CdSeS alloy/CdS core/shell/shell QDs sensitized mesoporous TiO2 photoanode, which exhibits high performance and long-term stability for solar-driven hydrogen generation. A gradient CdSe/alloy-shell/CdS core/shell/shell structure is designed to accelerate exciton separation through the band engineering approach. Compared with the common CdSe/CdS core/shell structure, light absorption of QDs containing an intermediate alloyed layer is extended to longer wavelengths and more importantly, the photocurrent density is improved up to 17.5 mA/cm2 under one sun illumination (AM 1.5 G, 100 mW/cm2), a record value for PEC cells based on colloidal QDs for hydrogen generation. In addition, the as-fabricated PEC cell shows an unprecedented long-term stability, maintaining 50% of its initial value after continuous operation for over 39 hours, indicating that the gradient core/shell/shell QDs based photoanode is a promising candidate for solar-driven hydrogen generation.

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Mar 2019, accepted on 13 May 2019 and first published on 15 May 2019

Article type: Paper
DOI: 10.1039/C9TA03026C
J. Mater. Chem. A, 2019, Accepted Manuscript

  •   Request permissions

    Efficient Solar-driven Hydrogen Generation Using Colloidal Heterostructured Quantum Dots

    K. Wang, X. Tong, Y. Zhou, H. Zhang, F. Navarro-Pardo, G. S. Selopal, G. Liu, J. Tang, Y. Wang, S. Sun, D. Ma, Z. Wang, F. Vidal, H. zhao, X. Sun and F. Rosei, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA03026C

Search articles by author