n-Si（111） surface tailed -C2H5, -C2H4COOH, -C2H2COOH were prepared by the reactions among Si-H to ethyl-Grignard, methyl acrylate and ethyl propionate, and the carboxyls were formed under the existence of trifluoroa...n-Si（111） surface tailed -C2H5, -C2H4COOH, -C2H2COOH were prepared by the reactions among Si-H to ethyl-Grignard, methyl acrylate and ethyl propionate, and the carboxyls were formed under the existence of trifluoroacetic acid. The composite n-Si（111） electrodes were obtained by depositing Pt nanodots and the photovoltaic characteristics for these electrodes were studied in I^-/I3^- redox electrolyte. The j-U （photo current density-potential） behaviors of photo-voltage and photocurrent densities to the electrodes under solar illumination varied regularly with groups of -C2H2COOH〉-C2H4COOH〉-H〉-C2H5. The photo-voltage and photocurrent density of the electrode tailed -C2 H2COOH were -0.641 V and 5.25 mA/cm^2, respectively, more negative than those of the non-conjugated modification.展开更多
The kinetics of interracial processes of CdSe thin film electrode before and after sur- face modification of 1,1'-di linolene ferrocenyl L-B films have been studied in K_4Fe(CN)_6 solution by Intensity Modulated P...The kinetics of interracial processes of CdSe thin film electrode before and after sur- face modification of 1,1'-di linolene ferrocenyl L-B films have been studied in K_4Fe(CN)_6 solution by Intensity Modulated Photocurrent Spectroscopy(IMPS).Potential dependence of surface state relaxation time(T_s),steady state photocurrent(I_s),collection coefficient of minority carriers(G_o), rate constant of photocorrosion(K_(cr)),and density of surface state(N_(ss))were determined in terms of frequency response analysis of IMPS plots.展开更多
基金We are grateful to the Project of the National Natural Science Foundation of China(Grant No.50602004)the support from Chinese Education for Back Student Abroad and the fund for Young Teacher of BUCT(Project No.QN0512)for financial support.
文摘n-Si（111） surface tailed -C2H5, -C2H4COOH, -C2H2COOH were prepared by the reactions among Si-H to ethyl-Grignard, methyl acrylate and ethyl propionate, and the carboxyls were formed under the existence of trifluoroacetic acid. The composite n-Si（111） electrodes were obtained by depositing Pt nanodots and the photovoltaic characteristics for these electrodes were studied in I^-/I3^- redox electrolyte. The j-U （photo current density-potential） behaviors of photo-voltage and photocurrent densities to the electrodes under solar illumination varied regularly with groups of -C2H2COOH〉-C2H4COOH〉-H〉-C2H5. The photo-voltage and photocurrent density of the electrode tailed -C2 H2COOH were -0.641 V and 5.25 mA/cm^2, respectively, more negative than those of the non-conjugated modification.
基金This work was supported by the National Natural Science Foundation of China
文摘The kinetics of interracial processes of CdSe thin film electrode before and after sur- face modification of 1,1'-di linolene ferrocenyl L-B films have been studied in K_4Fe(CN)_6 solution by Intensity Modulated Photocurrent Spectroscopy(IMPS).Potential dependence of surface state relaxation time(T_s),steady state photocurrent(I_s),collection coefficient of minority carriers(G_o), rate constant of photocorrosion(K_(cr)),and density of surface state(N_(ss))were determined in terms of frequency response analysis of IMPS plots.
