Skip to main content


Log in

A wide solar spectrum light harvesting Ag2Se quantum dot-sensitized porous TiO2 nanofibers as photoanode for high-performance QDSC

  • Research Paper
  • Published:
Journal of Nanoparticle Research Aims and scope Submit manuscript


A wide spectrum of light harvesting silver selenide (Ag2Se) quantum dots (QDs) with an average size of ~ 5 nm has been synthesized by a low-temperature one-pot hot injection method. To finely control the size of Ag2Se QDs, oleylamine was used as the solvent, and dodecanethiol was used as the capping agent as well as a stabilizer. The prepared Ag2Se QDs were ex situ sensitized on the porous TiO2 nanofiber (NF) substrate via a direct adsorption method to use as efficient photoanode for quantum dot-sensitized solar cell (QDSC). The UV-Vis-NIR absorption and photoluminescence studies revealed that Ag2Se QD-sensitized porous TiO2 NF photoanode (Ag2Se/P-TiO2) exhibited near-infrared (NIR) absorption and fast electron kinetics. Further, the QDSC fabricated using Ag2Se/P-TiO2 NFs as the photoanode, Cu2S as the counter electrode, and liquid polysulfide (S2−/Sx2− redox couple) as the electrolyte exhibited a photoconversion efficiency of 2.50% with an improved photocurrent density of 11.12 mA/cm2.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 4
Fig. 5
Fig. 6
Fig. 8
Fig. 9

Similar content being viewed by others


Download references


The authors gratefully acknowledge the CSIR, New Delhi, for providing the financial support (No. 01/2810/14/EMR-II dated 24-11-2014) and the CIF Pondicherry University for providing the instrumentation facilities. One of the authors, Ms. Nisha Singh, sincerely thanks the UGC, New Delhi, for providing Research Fellowship under the RGNF scheme.

Author information

Authors and Affiliations


Corresponding author

Correspondence to Subramania Angaiah.

Ethics declarations

Conflict of interest

The authors declare that they have no conflicts of interest.

Additional information

Publisher’s note

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

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Singh, N., Murugadoss, V., Rajavedhanayagam, J. et al. A wide solar spectrum light harvesting Ag2Se quantum dot-sensitized porous TiO2 nanofibers as photoanode for high-performance QDSC. J Nanopart Res 21, 176 (2019).

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: