Synthesis of near-infrared silver-indium-sulfide (AgInS2) quantum dots as heavy-metal free photosensitizer for solar cell applications

Kai Chun Cheng, Wing Cheung Law, Ken Tye Yong, Jeremy S. Nevins, David F. Watson, Ho Pui Ho, Paras N. Prasad

Research output: Journal article publicationJournal articleAcademic researchpeer-review

46 Citations (Scopus)


We report the use of silver-indium-sulfide (AgInS2) quantum dots (QDs) as heavy metal-free photosensitizer for QDs-sensitized solar cell. For fabricating the TiO2/AgInS2electrode, the QDs were attached to a mesoporous TiO2surface by using bifunctional linker molecules. The fabricated TiO2/AgInS2electrode exhibits light absorption in the visible region and serves as the photoanode. Upon bandgap excitation, injection of photoexcited electrons from AgInS2QDs into the TiO2matrix produces photocurrents accordingly. The proof-of-concept AgInS2QDs-sensitized solar cell exhibits a short-circuit current of 0.49 mA/cm2 and open-circuit voltage of 0.24 V, under one sun illumination.
Original languageEnglish
Pages (from-to)254-257
Number of pages4
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - 27 Oct 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

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