染料N719和Q-PbS复合敏化Zn_2TiO_4纳米晶薄膜电极的研究  

Study on Zn_2TiO_4 nanocrystalline film electrode with dye N719 and PbS quantum dots composite sensitization

作　　者：何祖明[1] 夏咏梅[2] 唐斌[1,3] 江兴方[1,3] 

机构地区：[1]常州大学怀德学院,江苏常州213016 [2]江苏理工学院材料工程学院,江苏常州213001 [3]常州大学数理学院,江苏常州213016

出　　处：《功能材料》2017年第7期7084-7087,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(61107055);江苏省高校自然科学研究面上资助项目(15KJD430004)

摘　　要：为了有效的利用太阳能,提高纳米晶薄膜太阳能电池的效率,针对太阳的发射光谱和纳米薄膜的吸收光谱,设计出复合敏化的薄膜太阳能电池。采用溶胶-凝胶法在FTO玻璃上制备了Zn_2TiO_4纳米晶薄膜,用XRD和SEM分别对其物相及形貌进行了表征;以染料N719和Q-PbS为敏化剂,制备了多种Zn_2TiO_4纳米晶薄膜电极,分别测试了他们的UV-Vis吸收光谱;优选出敏化效果好的电极为光阳极组装了太阳能电池,并进行了光电性能测试。研究结果表明,纳米晶薄膜为尖晶石结构的Zn_2TiO_4,呈球形多孔,平均晶粒约80nm;染料N719和Q-PbS敏化的电极,光响应范围均扩展到可见光区,出现了明显的红移,而且复合敏化的电极在可见光区具有较强的吸收;制备了多种染料敏化太阳能电池(DSSC),在模拟太阳光下,Zn_2TiO_4+Q-PbS(2min)+N719薄膜电极组成的DSSC的性能最优,其开路电压0.65V,电流密度3.3mA/cm^2,填充因子77%和转化效率达1.61%。In order to effectively use solar energy and improve the efficiency of the nanocrystalline thin film solar cells,compound sensitized thin film solar cells was designed to suit the emission spectrum of the sun and the absorption spectrum of nanometer film. The Zn2Ti（）4 nanocrystalline film was prepared on the FTO glass by sol-gel method. The structures and morphologies of Zn2Ti（）4 nanocrystalline film were investigated by X-ray diffraction （XRD）, emission scanning electron microscopy （SEM）. Different Zn2Ti（）4 nanocrystalline film elec-trode were prepared by dye N719 and Q-PbS sensitized, then used to test the UV-Vis absorption spectrum. The solar cells were assembled with selected film electrode with good sensitization effect, and their photoelectric performance was tested. The result shows that the Zn2TiO4 nanocrystalline film is spherical porous and spinel structure with the average grain size of about 80 nm. The light response range extends to the visible area and shows red shift. The compound sensitized electrode has strong absorption in the visible area of the film elec-trodes sensitized by dye N719 and Q-PbS. Multifarious dye sensitized solar cell （DSSC） were prepared. The property of the composite sensitized Zn2TiO4＋Q-PbS （2 min）＋N719 film electrode was best under the test of simulation solar light, with the open circuit voltage, current density, fill factor and conversion rate of 0.65 V, 3.3 mA/cm2 , 77 % and 1.61 % , respectively.

关 键 词：溶胶-凝胶 Zn2TiO4薄膜电极 量子点 染料N719 染料敏化太阳能电池 

分 类 号：O484[理学—固体物理]