PHOTOCURRENT ENHANCEMENT OF CdS QUANTUM DOT SENSITIZED TiO2 ELECTRODE IN THE PRESENCE OF GOLD NANO PARTICLES

Supriyono Supriyono; Hedi Surahman; Yuni Krisyuningsih Krisnandi; Jarnuzi Gunlazuardi

doi:10.17146/jsmi.2015.16.3.4228

PHOTOCURRENT ENHANCEMENT OF CdS QUANTUM DOT SENSITIZED TiO2 ELECTRODE IN THE PRESENCE OF GOLD NANO PARTICLES

Supriyono Supriyono⁽¹⁾, Hedi Surahman⁽²⁾, Yuni Krisyuningsih Krisnandi⁽³⁾, Jarnuzi Gunlazuardi⁽⁴⁾,

(1) Department of Chemistry, Faculty of Mathematic and Sciences-University of Indonesia Kampus Baru UI Depok 16424
(2) Department of Chemistry, Faculty of Mathematic and Sciences-University of Indonesia Kampus Baru UI Depok 16424
(3) Department of Chemistry, Faculty of Mathematic and Sciences-University of Indonesia Kampus Baru UI Depok 16424
(4) Department of Chemistry, Faculty of Mathematic and Sciences-University of Indonesia Kampus Baru UI Depok 16424

Corresponding Author

Abstract

PHOTOCURRENT ENHANCEMENT OF CdS QUANTUM DOT SENSITIZED TiO₂ ELECTRODE IN THE PRESENCE OF GOLD NANO PARTICLES. Photo current enhancement of CdS Quantum Dot (CdS-QD) sensitized TiO₂ electrode in the presence of gold nano particles had been investigated. CdS quantum dots were prepared by successive ionic layer adsorption and reaction (SILAR) method, in which solution containing Cd(CH₃COO)₂ and Na₂S were used as a precursor. Where as, gold nano particles was synthesized using solution containing HAuCl₄ as a precursor, NaBH₄ as a reducing agent and polyvinyl pyrrolydone (PVP) as a stabilizer. The film of CdS quantum dots and Au nano particles were characterized by UV-Vis spectrophotometer, Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), and electro chemical working station. Photo electrochemical study revealed that CdS-sensitized TiO₂ electrode with gold nanoparticles have been able to increase photocurrent of 54 A/cm² to 68 A/cm², so the photocurrent enhancement of approximately 25% was observed. This observation indicates that the gold nanoparticles is potentially applicable to enhance photocurrent in a CdS-QD sensitized TiO₂ electrode, which may lead to the development of more efficient solar cell.