TY - JOUR
T1 - Influence of quantum dots and TiO2 photoanode parameters on electron lifetimes and performance of photonode
AU - Quan, Linlin
AU - Li, Weiping
AU - Geng, Huifang
AU - Liu, Huicong
AU - Zhu, Liqun
N1 - Publisher Copyright:
©, 2015, Beijing University of Aeronautics and Astronautics (BUAA). All right reserved.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Effects of film thickness of P25TiO2 photoanode, different types of quantum dots sensitized and method of quantum dots co-sensitization, which are the factors of interest, on P25TiO2 photoanode were analyzed. The relationship between P25TiO2 film thickness and electron lifetimes were investigated by the method of successive ionic layer absorption and reaction (SILAR). Besides, the influence of quantum dots type and method of quantum dots co-sensitization on photoelectrochemical performance of photoanode was studied. Electrochemical impedance spectra (EIS), open circuit voltage decay (OCVD) and UV-Vis absorption spectra were used to measure and analyze the factors which influence the photoelectrochemical performance and electron lifetimes of P25TiO2 photoanode. The results indicate that P25TiO2 with the film thickness of 12 μm exhibits the minimum recombination losses and longer electron lifetimes. Furthermore, the short circuit current and power conversion efficiency of co-sensitized photoanode (TiO2/CdS/CdSe/ZnS) increase 34% and 42% respectively compared to those of single sensitized photoanode (TiO2/CdS). Besides, appropriate film thickness of P25TiO2 photoanode and method of co-sensitization are important factors to increase the electron lifetimes of photoanode, the absorption spectrum and intensity of photoanode.
AB - Effects of film thickness of P25TiO2 photoanode, different types of quantum dots sensitized and method of quantum dots co-sensitization, which are the factors of interest, on P25TiO2 photoanode were analyzed. The relationship between P25TiO2 film thickness and electron lifetimes were investigated by the method of successive ionic layer absorption and reaction (SILAR). Besides, the influence of quantum dots type and method of quantum dots co-sensitization on photoelectrochemical performance of photoanode was studied. Electrochemical impedance spectra (EIS), open circuit voltage decay (OCVD) and UV-Vis absorption spectra were used to measure and analyze the factors which influence the photoelectrochemical performance and electron lifetimes of P25TiO2 photoanode. The results indicate that P25TiO2 with the film thickness of 12 μm exhibits the minimum recombination losses and longer electron lifetimes. Furthermore, the short circuit current and power conversion efficiency of co-sensitized photoanode (TiO2/CdS/CdSe/ZnS) increase 34% and 42% respectively compared to those of single sensitized photoanode (TiO2/CdS). Besides, appropriate film thickness of P25TiO2 photoanode and method of co-sensitization are important factors to increase the electron lifetimes of photoanode, the absorption spectrum and intensity of photoanode.
KW - Cosensitization
KW - Electron lifetimes
KW - Electron recombination
KW - Photoanode
KW - Photoelectrochemical performance
UR - https://www.scopus.com/pages/publications/84939430923
U2 - 10.13700/j.bh.1001-5965.2014.0541
DO - 10.13700/j.bh.1001-5965.2014.0541
M3 - 文章
AN - SCOPUS:84939430923
SN - 1001-5965
VL - 41
SP - 1322
EP - 1329
JO - Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics
JF - Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics
IS - 7
ER -