SnS掺杂对P3HT/PCBM体系太阳能电池光电特性的影响研究  

Effects of Sn S Doping on Photovoltaic Performance of P3HT:PCBM Multilayer Heterojunction Solar Cells

作　　者：陆冠宏 赵新洛[1] 王焱[2] 朱书影 孙静[2] 谢晓峰[2] 

机构地区：[1]上海大学理学院,上海200444 [2]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2016年第3期263-268,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(51102264);广东省中国科学院全面战略合作专项基金(2013B091100002)~~

摘　　要：采用连续离子层吸附反应法(SILAR)在TiO_2/FTO电极上沉积Sn S,组装结构为FTO/TiO_2/Sn S/P3HT:PCBM/Ag的多层异质结太阳能电池,结果显示:Sn S掺杂能显著提高P3HT/PCBM体系太阳能电池的光电转化性能。通过SEM观察、UV-Vis光谱、J-V曲线、Raman光谱以及射频辉光放电光谱仪(GD-OES)等手段,系统研究了不同前驱体液浓度制备的Sn S对电池的影响,发现当n(Sn^(2+)):n(S^(2-))为1:1.5时,电池的光电转化效率最高,达到0.369%,其开路电压、短路电流和填充因子分别达到0.373 V、1.92 m A/cm^2和51.2%。另外,GD-OES谱图显示前驱体溶液中Sn^(2+)/S^(2-)比例对于Sn S_x层的化学组成及沉淀量具有重要影响,从而导致复合太阳能电池光电性能的显著变化。Sn S was deposited on the surface of FTO/TiO2 electrodes with different molar concentration ratio of Sn^（2＋） and S^（2-） using successive ionic layer absorption and reaction（SILAR） method. Afterwards, the as-prepared TiO2/Sn S composite electrode was assembled into a multilayer heterojunction solar cell with an architecture of FTO/TiO2/Sn S/ P3HT：PCBM/Ag. The TiO2/Sn S composite films were characterized by scanning electron microscopy（SEM）, Raman spectra analysis and Glow discharge optical emission spectrometer（GD-OES）. The photovoltaic performance of solar cells were determined using UV-Vis spectra and I-V curves. Results showed that incorporation of Sn S significantly improved the short-circuit current of the multilayer heterojunction solar cells. Meanwhile, the dependence of the photovoltaic performance of solar cells on the molar concentration ratio of Sn^（2＋）/S^（2-） was investigated systematically. During the SILAR processes, a series of electrodes were prepared in the precusor solutions with different Sn^（2＋）/S^（2-） molar concentration ratios（n（Sn^（2＋））：n（S^（2-））= 1：1, 1：1.25, 1：1.5, 1：1.75 and 1：2）. Moreover, GD-OES method distinguished the effects of Sn^（2＋）/S^（2-） ratio on the Sn Sx layer deposition. It was found that the Sn^（2＋）/S^（2-） ratio of SILAR precursors, dominated by thickness and chemical composition of Sn Sx, affected photovoltaic performance of the solar cells significantly. I-V test results testified that the ratio of Sn^（2＋）/S^（2-） molar concentration was optimized at 1：1.5, which resulted in the highest photoelectric conversion efficiency. The open-circuit voltage（V（oc））, short-circuit current density（J（sc））, fill factor（FF）, and power conver-sion efficiency（PCE） reached 0.373 V, 1.92 m A/cm^2, 51.2%, and 0.369%, respectively.

关 键 词：太阳能电池 连续离子层吸附反应 硫化亚锡 多层异质结 

分 类 号：TQ174[化学工程—陶瓷工业]