一种提高染料敏化太阳电池光吸收的结构的初步研究

Preliminary study on the structure of dye-sensitized solar cells for enhancing light absorption

染料敏化太阳电池中的染料对入射太阳光的充分吸收是提高电池光电转换效率的一个重要因素,针对染料在长波范围吸收光差的缺点,本文介绍了一种提高电池光吸收的改进结构。对P25氧化钛粉工艺制备的电池及改进结构的透过光谱和光电转换效率进行了初步研究,电池的透过光谱测试表明,有相当一部分光透过电池而没有充分利用。经太阳模拟器测试,改进结构对提高电池光吸收具有明显的效果,短路电流增加了大约0.8mA/cm2,光电转换效率相对提高了11.4%。

The absorption of a large fraction of the incident solar radiation by the photoactive layer of aye-sensitized solar cells （DSSC） is an important factor for achieving useful photoelectric conversion efficiencies. To solve the problem of the poor absorption of dyes at the longer wavelength region, An improved structure of DSSC for enhancing light absorption was introduced in this paper, For DSSC fabricated by P25 powder technique, the transmittance spectra of the cell shows that much of light was passed through the cell and was not used. As a result, the improved DSSC exhibited higher photocurrent and photoelectric conversion efficiency than the traditional DSSC. The short-circuit current densities was increased about 0.8mA/cm^2 , and photoelectric conversion efficiencies was enhanced about 11.4%.