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Improving the performance of QDSSC s based on Tio 2 /CdS (Silar)/CdSe(Colloid)/Zns(Silar) photoanodes
Author(s) -
Ha Tung Thanh,
Chi Cuong Huynh,
Vy Nguyen. T.,
Thoa Nguyen T. P.,
Huynh Thanh Dat,
Lam Quang Vinh
Publication year - 2015
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12150
Subject(s) - quantum dot , materials science , chemical engineering , adsorption , nanotechnology , band gap , colloid , deposition (geology) , nanoparticle , chemical bath deposition , electrode , inorganic chemistry , chemistry , optoelectronics , paleontology , sediment , engineering , biology
In this study, CdSe quantum dots (QDs) were prepared using colloidal trioctylphosphine (TOP) with an organic ligand layer and oleic acid as a capping agent, and a photoelectrode anode was prepared using CdS/CdSe QDs/ZnS thin film deposition on a TiO 2 electrode via the successive ionic layer adsorption and reaction (SILAR) method. The results indicated that the short current density increased from 4.79 mA/cm 2 to 13.97 mA/cm 2 because the conduction band of the CdSe (size ∼ 3 nm) QDs became higher than that of both TiO 2 and CdS. As a result, the stimulated electrons were efficiently injected into the conduction band of TiO 2 and CdS. In addition, the dynamic resistance and the lifetime of stimulated electrons in the QDSSCs were investigated using Nyquist and Bode plots. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1774–1779, 2015