Sb_2S_3对枝状TiO_2阵列的修饰及其在杂化太阳电池中的应用  

Array of dendritic TiO_2 modified with Sb_2S_3 and its application in hybrid solar cells

作　　者：李英品[1] 魏亚男 郝彦忠[1] 冯康宁 张玉梅[1] 裴娟[1] 孙宝[1] LI Yingpin;WEI Yanan;HAO Yanzhong;FENG Kangning;ZHANG Yumei;PEI Juan;SUN Bao(School of Science,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China)

机构地区：[1]河北科技大学理学院,河北石家庄050018

出　　处：《河北科技大学学报》2018年第4期372-378,共7页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(21173065;21603053);河北省自然科学基金(B2014208062;B2014208066;B2010000856)

摘　　要：为了提供多条电子传输通道,增加窄禁带半导体和有机半导体的负载量,采用一步水热法,在FTO基底上制备了由纳米管和纳米线组装而成的枝状TiO_2;通过化学浴沉积法,在枝状TiO_2上成功地制备了窄禁带半导体Sb_2S_3;利用SEM,XRD,紫外-可见吸收光谱,瞬态光电流,稳态荧光光谱及J-V曲线等手段,对样品形貌、晶型、吸光性能和光电性能进行了表征和测试,探究Sb_2S_3沉积时间对电池效率的影响。结果表明:稀疏的枝状TiO_2阵列垂直于FTO导电玻璃生长,为电荷传输提供了有利条件;Sb_2S_3的加入,加强了电极材料对可见光的吸收,提高了光电流强度及荧光猝灭强度,有利于光生载流子的产生和转移;由枝状TiO_2/Sb_2S_3(3h)/P3HT/PEDOT∶PSS/Au构成的杂化太阳电池的能量转换效率达到了1.10%,是未沉积Sb_2S_3的杂化太阳电池能量转换效率的10倍。在多级结构TiO_2上沉积Sb_2S_3,有利于提高电极材料对可见光的吸收,加强光生载流子的传输能力,拓宽光谱响应范围,提高光电性能,对于解决单纯TiO_2电极吸收强度较弱和光谱响应范围较窄等问题具有重要意义。In order to provide multiple electron transmission channels and increase the load of narrow gap semiconductor and organic semiconductor,the array of TiO2 dendritic structure assembled by nanotube and nanowire is constructed on FTO glass by hydrothermal method.Narrow gap semiconductor Sb2S3 is fabricated on dendritic TiO2 successfully by chemical bath deposition(CBD)method.By means of SEM,XRD,UV visible absorption spectrum,transient photocurrent,steady-state fluorescence spectrum and J-V curve,the morphology,crystal shape,light absorption and photoelectric properties of the samples are characterized and tested.The effect of deposition time on power conversion efficiency(PCE)is further studied.The results show that sparse TiO2 dendritic structure formed vertical to the FTO substrate might be a benefit for the fast electron transport;the addition of Sb2S3 strengthens the absorption of visible light,improves the photocurrent intensity,increases the intensity of fluorescence quenching and facilitates the generation and transfer of photogenerated carriers;the PCE of hybrid solar cell(HSC)based on dendritic TiO2/Sb2S3/P3HT/PEDOT∶PSS/Au structure reaches 1.10%,and this PCE is 10 times that of the HSC without Sb2S3.The deposition of Sb2S3 on the multistage structure TiO2 is conducive to improving the absorption of visible light,strengthening the transmission capacity of the optical carrier,broadening the spectrum response range and improving the photoelectric performance.It is of great significance to solve the problems of weak absorption intensity and narrow spectrum response range of simple TiO2 electrodes.

关 键 词：电化学 枝状TiO2 Sb2S3 化学浴沉积法 杂化太阳电池 

分 类 号：O649[理学—物理化学]