基于氮掺杂氧化钛光阳极的高效染料敏化太阳电池  

HIGHLY EFFICIENT DYE-SENSITIZED SOLAR CELLS BASED ON N-DOPED TITANIA ELECTRODES

作　　者：沈艺花[1] 郭薇[1] 马廷丽[1] 

机构地区：[1]大连理工大学化工学院精细化工国家重点实验室,大连116012

出　　处：《太阳能学报》2012年第12期2050-2055,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50773008)

摘　　要：分别以氨水、尿素、三乙胺为氮源,采用湿法合成3种氮掺杂氧化钛(TiO2-xNx)粉体。为了考察不同氮源的影响,对3种TiO2-xNx粉体和薄膜进行性质表征。结果表明:3种TiO2-xNx的晶型均为锐钛矿型;在400～550nm处均出现新的吸收峰;3种TiO2-xNx的比表面积和氮掺杂量均有所差异。将3种TiO2-xNx应用到染料敏化太阳电池中研究其光电性能,其中以氨水为氮源合成的氮掺杂体系的电池获得最高的光电转换效率8.32%,与未掺杂TiO2和P25电极相比,光电转换效率分别提高17%和44%。氮掺杂太阳电池中光电流的增大是染料吸附量的增加与较快的电子传输速度的协同作用。Three kinds of N-doped titania （TiO2-xNx） were synthesized by wet methods using ammonia, urea, and triethylamine as nitrogen sources, respectively. The effect of different nitrogen sources on the properties of TiO2.xNx powder and film were investigated in detail. These results show that all three TiO2-xNx are pure phase of anatase. New absorption peaks from 400nm to 550nm in visible light region were observed in UV-Vis spectra. Surface area and nitrogen doping amount varied with doping methods. The three kinds of TiO2-x Nx electrodes were introduced into dye-sensitized solar cells. TiO2-x Nx using ammonia as nitrogen sources exhibits the highest efficiency of 8.32%. Comparing with pure TiO2 and commercial P25 electrodes, 17% and 44% improvement in efficiency were realized in dye-sensitized TiO2-xNx solar cells. The mechanism of electron transport time and electron lifetime of TiO2-xNx and pure TiO2 was studied. The results indicate that synergistic effect of fast electron transport and high dye uptake contributes to high photovoltaic performance.

关 键 词：氮源 氮掺杂 湿法 染料敏化太阳电池 光电性能 

分 类 号：TK514[动力工程及工程热物理—热能工程]