Modulation of the photoelectrochemical behavior of Au nanocluster-TiO2electrode by doping

Malenahalli H. Naveen, Rizwan Khan, Muhammad A. Abbas, Eunbyol Cho, Geun Jun Lee, Hahkjoon Kim, Eunji Sim, Jin Ho Bang

Research output: Contribution to journalArticle

Abstract

Despite the successful debut of gold nanoclusters (Au NCs) in solar cell applications, Au NCs, compared to dyes and quantum dots, have several drawbacks, such as lower extinction coefficients. Any modulation of the physical properties of NCs can have a significant influence on the delicate control of absorbance, energy levels, and charge separation, which are essential to ensure high power conversion efficiency. To this end, we systematically alter the optoelectronic structure of Au18(SR)14 by Ag doping and explain its influence on solar cell performance. Our in-depth spectroscopic and electrochemical characterization combined with computational study reveals that the performance-dictating factors respond in different manners to the Ag doping level, and we determine that the best compromise is the incorporation of a single Ag atom into an Au NC. This new insight highlights the unique aspect of NCs - susceptibility to atomic level doping - and helps establish a new design principle for efficient NC-based solar cells. This journal is

Original languageEnglish
Pages (from-to)6248-6255
Number of pages8
JournalChemical Science
Volume11
Issue number24
DOIs
Publication statusPublished - 2020 Jun 28

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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    Naveen, M. H., Khan, R., Abbas, M. A., Cho, E., Lee, G. J., Kim, H., Sim, E., & Bang, J. H. (2020). Modulation of the photoelectrochemical behavior of Au nanocluster-TiO2electrode by doping. Chemical Science, 11(24), 6248-6255. https://doi.org/10.1039/d0sc01220c