Jianmin Lin

Leqing Fan; S. Kang; J. Wu; Shancun Hao; Zhang Lan; Jianmin Lin

Abstract A new ionic liquid polymer gel electrolyte containing 1-butyl-3-methylimidazolium iodide, polyvinylpyrrolidone, potassium iodide, and iodine has been prepared and characterized. Controlling the concentration of 1-butyl-3-methylimidazolium iodide, KI, and I2 with 0.9 M, 0.5 M, and 0.12 M, respectively, the ionic liquid polymer gel electrolyte attains the maximum ionic conductivity (at 30°C) of 2.3 mS cm−1. Based on the ionic liquid polymer gel electrolyte, quasi-solid state dye-sensitized solar cell was fabricated and its overall light-to-electricity energy conversion efficiency of 5.41% was achieved under irradiation of AM1.5 (100 mW cm−2). The dye-sensitized solar cell employing the ionic liquid polymer gel electrolyte shows a more stable photovoltaic performance than a dye-sensitized solar cell assembled with liquid electrolyte.

L. Lin; Jianmin Lin; J. Wu; Shancun Hao; Zhang Lan

Abstract A ZnO modified TiO2 (ZnO/TiO2) film was prepared by immersing TiO2 electrodes in Zn(Ac)2 aqueous solution. The open circuit voltage of a dye sensitised solar cell (DSSC) with the ZnO/TiO2 film electrode has a dramatic enhancement, compared to the DSSC with the TiO2 film electrode. However, the short circuit current density of the DSSC with the ZnO/TiO2 film electrode is lower than that with TiO2 electrode. The film electrodes were characterised by SEM, EDX and UV-vis, and the photoelectric performance of DSSCs were measured. The photovoltage enhancement is attributed to the formation of a flat-band potential energy barrier by ZnO at TiO2/electrolyte interface. The decline of the photocurrent with ZnO/TiO2 film electrode is due to poor dye absorption on larger particles of ZnO.

Yunfang Huang; Jing Li; Yuelin Wei; Yibin Li; Jianmin Lin; Jihuai Wu

H(1-x)LaNb(2-x)Mo(x)O(7) was prepared by solid-state reaction followed by an ion-exchange reaction. Pt was incorporated in the interlayer of H(1-x)LaNb(2-x)Mo(x)O(7) by the stepwise intercalation reaction. The H(1-x)LaNb(2-x)Mo(x)O(7) showed hydrogen production activity and the activities were greatly enhanced by Pt co-incorporating. The x value in H(1-x)LaNb(2-x)Mo(x)O(7) had an important effect on the photocatalytic activity of the catalyst. When the x=0.05, the H(1-x)LaNb(2-x)Mo(x)O(7)/Pt showed a photocatalytic activity of 80 cm(3)h(-1)g(-1) hydrogen evolution rate in 10 vol.% methanol solution under irradiation from a 100 W mercury lamp at 333K.

X M Sun; Qunwei Tang; J. Wu; K Q Xu; X Zhong; Jianmin Lin; M. Huang

Abstract Poly(acrylamide‐pyrrole) conducting polymer was prepared by a two‐step aqueous polymerisation. First, the polyacrymide superabsorbent polymer was synthesised by a routine aqueous polymerisation. Second, pyrrole monomers were absorbed inside the polyacrylamide network and followed by a polymerisation to form a poly(acrylamide‐pyrrole) polymer. An interpenetrating network structure model with a three‐dimensional network of polyacrylamide and a one‐dimensional chain of polypyrrole for poly(acrylamide‐pyrrole) conducting hydrogel was proposed. The conductivity of the hydrogel depends on the polypyrrole conjugated chains. After preparation conditions were optimised, the hydrogel possessed a conductivity of 21·33 mS cm−1.

Guixiang Xie; J. Wu; Jianmin Lin; Qingbei Li; Zhang Lan; Yaoming Xiao; Gentian Yue; HaiFeng Ye; M. Huang

Abstract Y2O3:(Eu3+,Gd3+) is introduced into a dye-sensitized solar cell. As a luminescence medium, Y2O3:(Eu3+,Gd3+) improves light harvest via conversion luminescence process and increases photocurrent; as a p-type dopant, Y2O3:(Eu3+,Gd3+) elevates photovoltage. The cells light-to-electric energy conversion efficiency enhances 18.6% compared to the cell without Y2O3:(Eu3+,Gd3+) doping.

Qingbei Li; J. Wu; Qunwei Tang; Shancun Hao; Yaoming Xiao; Jianmin Lin; M. Huang

Abstract In this paper, nanoscaled polypyrrole particles were synthesised using I2 as dopant and oxidant, which were subsequently used to prepare polypyrrole/epoxy resin composition counter electrode for construction of dye sensitised solar cells (DSSCs). The results of photoelectric properties measurement revealed that the open-circuit voltage V oc was 0·525 V, short circuit current density J sc was 0·90 mA cm–2, fill factor FF was 0·45 and overall energy conversion efficiency η was 0·22% respectively. The introduction of polypyrrole/epoxy resin counter electrode decreased the demand of fluorine doped tin oxide (FTO) coated glass substrate of DSSCs, which proposed a novel idea for the development of counter electrodes.

Zhang Lan; J. Wu; Jianmin Lin; M. Huang

A highly photovoltaic performance of dye-sensitized solar cell with energy conversion efficiency about 9.20% is obtained through the addition of a blocking layer and TiCl4 treatment on the TiO2 film to suppress dark reaction. It is found that the addition of a 1.0-μm blocking layer in the photoelectrode can improve the energy conversion efficiency of a dye-sensitized solar cell from 7.41 to 7.92%, and the further 80°C TiCl4 aqueous solution treatment on the TiO2 film can also obviously enhance the energy conversion efficiency from 7.92 to 9.20%, due to the efficient suppression of dark reaction in the dye-sensitized solar cell. Thus, the addition of a blocking layer and TiCl4 treatment on the TiO2 film is an efficient way for fabricating highly photovoltaic performance of the dye-sensitized solar cell.

Qingbei Li; J. Wu; Qunwei Tang; Yaoming Xiao; Leqing Fan; M. Huang; Jianmin Lin

Abstract TiO2 nanocrystal is prepared by a repetitious hydrothermal crystallization method. Based on the TiO2 nanocrystal, a flexible photoanode film and flexible dye-sensitized solar cell are assembled at low temperatures. The influences of agglutinant, low temperature treatment, and UV irradiation on the photoelectric properties of the flexible cells are investigated. The dye-sensitized solar cells using FTO/glass and ITO/PEN as substrates achieve light-to-electric energy conversion efficiencies of 4.47 and 2.92%, respectively.

Yaoming Xiao; Jihuai Wu; Gentian Yue; Jianmin Lin; Miaoliang Huang; Zhang Lan

Yunfang Huang; Yuelin Wei; Shuhong Cheng; Leqing Fan; Yibin Li; Jianmin Lin; Jihuai Wu