高效CdS量子点敏化B/S共掺杂纳米TiO_2太阳能电池的制备及光电性能研究  

Boron and Sulfur Co-doped TiO_2 Nanofilm as High Efficiency CdS Quantum-dot-sensitized Solar Cells

作　　者：李玲[1] 肖俊莹 崔米豆 太优一 庞永文 韩松[1] 李晓苇[1] 

机构地区：[1]河北大学物理科学与技术学院河北省光电信息材料重点实验室,保定071002 [2]四川大学材料科学与工程学院,成都610064

出　　处：《无机材料学报》2016年第6期627-633,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(21201053);高等学校博士学科点专项科研基金新教师类资助课题(20121301120005);河北省自然科学基金(F2014201078;2015201050);河北省应用基础研究计划重点基础研究项目(14964306D);河北省教育厅基金(ZD2016055;QN2014057);河北省大学创新创业训练计划项目(2015066;2015161;201510075047;026);河北大学学生综合素质培养项目(2015zh0442;2015zh0443);河北大学杰出青年基金(2015JQ02)~~

摘　　要：采用水热法制备硼硫(B/S)共掺杂纳米二氧化钛(B-S-TiO_2),并配制成浆料,利用丝网印刷技术在FTO导电玻璃上制备B-S-TiO_2薄膜;用化学浴沉积(CBD)法制备了CdS量子点敏化B-S-TiO_2薄膜电极,并用X射线衍射(XRD)、电子显微镜(TEM)、元素分析能谱(EDS)和紫外–可见光谱对其进行表征分析;结果显示:B/S共掺杂不会改变TiO_2的晶型,掺杂后的TiO_2吸收边带发生明显红移,吸收强度显著增强;同样用化学浴沉积的方法制备Ni S工作电极,用改性的聚硫化物((CH3)4N)2S/((CH3)4N)2Sn)电解液,组装CdS量子点敏化硼硫(B/S)共掺杂纳米二氧化钛(B-S-TiO_2)太阳能电池,并测试电池光电性能。测试结果表明,在AM1.5G的照射下,电池的能量转化效率(η)由3.21%增大到3.69%,提高了14.9%,电池获得高达(Voc)1.218 V的开路电压和3.42 m A/cm2的短路光电流(Jsc),以及高达88.7%的填充因子(ff)。B and S co-doped TiO2 was prepared by a typical hydrothermal synthesis. Then the obtained B-S-TiO2 was dissolved in organic solvent to form paste and then coated on FTO conducting glass by screen printing to prepare nanofilm. The CdS/B-S-TiO2 composite electrodes was obtained by chemical bath deposition （CBD） using B-S-TiO2 nanofilm and CdS quantum dots （QDs）. The obtained samples were characterized by EDS, XRD, TEM and UV-Vis. The results show that B and S do not change the structure of anatase TiO2. Noticeable shifts of absorbance edge towards longer wavelength were observed and the absorbance intensity of the B-S-TiO2 nanofilm increases significantly. Furthermore, NiS was prepared as counter electrode by CBD and a modified polysulfide redox couple, （（CH3）4N）2S/（（CH3）4N）2Sn, was employed as electrolyte to assemble CdS quantum-dots （QDs）-sensitized solar cells. The measurements show that the cells have an enhanced energy conversion efficiency under AM 1.5 G illuminations which increased from 3.21% to 3.69%, about 14.9% increment, with a significantly high open voltage （Voc） of 1.218 V, a high filled factor （ff） of 88.7%, and a short-circuit photocurrent （Jsc） of 3.42 mA/cm2.

关 键 词：CdS量子点敏化太阳能电池 B/S共掺杂TiO2 化学浴沉积(CBD) NiS对电极 多硫电解液 

分 类 号：O613[理学—无机化学]