Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Multiple exciton generation effect in photocatalytic overall water splitting

A photocatalyst comprising CdTe quantum dots and V-doped In2S3 exhibits a strong interfacial built-in electric field and an interfacial trapping state that provide sufficient driving force for extracting excitons and separating carriers during photocatalytic water splitting. Multiple excitons can be generated per photon and exploited to achieve an internal quantum efficiency of more than 100% for hydrogen production.

This is a preview of subscription content, access via your institution

Access options

Rent or buy this article

Prices vary by article type



Prices may be subject to local taxes which are calculated during checkout

Fig. 1: Time-dependent photocatalytic activity and the exciton generation and transfer process in CdTe/V-In2S3 photocatalysts.


  1. Bie, C., Wang, L. & Yu, J. Challenges for photocatalytic overall water splitting. Chem. 8, 1567–1574 (2022). A review article that presents an overview of photocatalytic overall water splitting, highlighting the opportunities and challenges associated with this technology.

    Article  Google Scholar 

  2. Guo, S., Li, X., Li, J. & Wei, B. Boosting photocatalytic hydrogen production from water by photothermally induced biphase systems. Nat. Commun. 12, 1343 (2021). This paper reports a photothermal–photocatalytic biphasic system with an interfacial barrier and transport resistance of the hydrogen gas that are nearly two orders of magnitude lower than those of particulate photocatalytic systems.

    Article  Google Scholar 

  3. Takata, T. et al. Photocatalytic water splitting with a quantum efficiency of almost unity. Nature 581, 411–414 (2020). This paper reports a SrTiO3 :Al photocatalyst with an external quantum efficiency of up to 96% at wavelengths between 350 and 360 nm.

    Article  Google Scholar 

  4. Wang, B. et al. Heat diffusion-induced gradient energy level in multishell bisulfides for highly efficient photocatalytic hydrogen production. Adv. Energy Mater. 10, 2001575 (2020). This paper reports a multi-shell ZnS/CoS2 photocatalyst with gradient energy levels, which effectively facilitate exciton separation and electron transfer.

    Article  Google Scholar 

  5. Kroupa, D. M. et al. Enhanced multiple exciton generation in PbS|CdS Janus-like heterostructured nanocrystals. ACS Nano 12, 10084–10094 (2018). This paper reports a PbS/CdS photocatalyst with a Janus structure, which exhibits a trapping state for slowing the hot-electron relaxation rate and improving the MEG performance.

    Article  Google Scholar 

Download references

Additional information

Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

This is a summary of: Zhang, Y. et al. Internal quantum efficiency higher than 100% achieved by combining doping and quantum effects for photocatalytic overall water splitting. Nat. Energy (2023).

Rights and permissions

Reprints and Permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Multiple exciton generation effect in photocatalytic overall water splitting. Nat Energy 8, 433–434 (2023).

Download citation

  • Published:

  • Issue Date:

  • DOI:


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing