物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2012年
6期
1368-1372
,共5页
TiO2%纳米片/巢状纳米阵列%水热合成%染料敏化太阳能电池%光电转换
TiO2%納米片/巢狀納米陣列%水熱閤成%染料敏化太暘能電池%光電轉換
TiO2%납미편/소상납미진렬%수열합성%염료민화태양능전지%광전전환
TiO2%Nanosheet/nestlike nanoarray%Hydrothermal synthesis%Dye-sensitized solar cell%Photoelectric conversion
采用水热合成法在氟掺杂二氧化锡(FTO)导电玻璃基底上得到TiO2纳米阵列薄膜,并进一步通过NaOH溶液水热处理制备了由巢状纳米阵列及纳米片覆盖层构成的TiO2纳米阵列分级结构一体化薄膜.采用场发射扫描电镜(FE-SEM),X射线衍射(XRD),紫外-可见(UV-Vis)漫反射光谱和吸收光谱技术对TiO2薄膜的结构和性质进行表征.FE-SEM结果表明:分级结构TiO2薄膜膜厚为1.5 μm,薄膜由一层纳米片覆盖层(约0.2 μm高)和一层巢状纳米阵列层(约1.3 μm高)组成.XRD谱图表明TiO2薄膜为锐钛矿相.UV-Vis光谱显示分级结构TiOz薄膜具有较强的光捕获能力和染料吸附能力.TiO2纳米片/巢状分级结构纳米阵列薄膜作为光阳极,可有效地提高染料敏化太阳能电池的光电转换效率,其短路电流(Jsc)为7.79 mA·cm-2,开路电压(Voc)为0.80 V,填充因子(FF)为0.40,光电转换效率(η)为2.48％,其光电转换效率较TiO2纳米阵列薄膜提高了近10倍.
採用水熱閤成法在氟摻雜二氧化錫(FTO)導電玻璃基底上得到TiO2納米陣列薄膜,併進一步通過NaOH溶液水熱處理製備瞭由巢狀納米陣列及納米片覆蓋層構成的TiO2納米陣列分級結構一體化薄膜.採用場髮射掃描電鏡(FE-SEM),X射線衍射(XRD),紫外-可見(UV-Vis)漫反射光譜和吸收光譜技術對TiO2薄膜的結構和性質進行錶徵.FE-SEM結果錶明:分級結構TiO2薄膜膜厚為1.5 μm,薄膜由一層納米片覆蓋層(約0.2 μm高)和一層巢狀納米陣列層(約1.3 μm高)組成.XRD譜圖錶明TiO2薄膜為銳鈦礦相.UV-Vis光譜顯示分級結構TiOz薄膜具有較彊的光捕穫能力和染料吸附能力.TiO2納米片/巢狀分級結構納米陣列薄膜作為光暘極,可有效地提高染料敏化太暘能電池的光電轉換效率,其短路電流(Jsc)為7.79 mA·cm-2,開路電壓(Voc)為0.80 V,填充因子(FF)為0.40,光電轉換效率(η)為2.48％,其光電轉換效率較TiO2納米陣列薄膜提高瞭近10倍.
채용수열합성법재불참잡이양화석(FTO)도전파리기저상득도TiO2납미진렬박막,병진일보통과NaOH용액수열처리제비료유소상납미진렬급납미편복개층구성적TiO2납미진렬분급결구일체화박막.채용장발사소묘전경(FE-SEM),X사선연사(XRD),자외-가견(UV-Vis)만반사광보화흡수광보기술대TiO2박막적결구화성질진행표정.FE-SEM결과표명:분급결구TiO2박막막후위1.5 μm,박막유일층납미편복개층(약0.2 μm고)화일층소상납미진렬층(약1.3 μm고)조성.XRD보도표명TiO2박막위예태광상.UV-Vis광보현시분급결구TiOz박막구유교강적광포획능력화염료흡부능력.TiO2납미편/소상분급결구납미진렬박막작위광양겁,가유효지제고염료민화태양능전지적광전전환효솔,기단로전류(Jsc)위7.79 mA·cm-2,개로전압(Voc)위0.80 V,전충인자(FF)위0.40,광전전환효솔(η)위2.48％,기광전전환효솔교TiO2납미진렬박막제고료근10배.
A hierarchical configuration of TiO2 nanoarray film,comprising a nestlike TiO2 nanoarray layer integrated with a nanosheet network overlayer,was constructed.The hierarchical TiO2 film was obtained by the post-hydrothermal treatment with NaOH solution on hydrothermally synthesized TiO2-derived nanostructured arrays grown on fluorine-doped tin oxide substrate (FTO).The TiO2 films were characterized by field-emission scanning electron microscope (FE-SEM),X-ray diffraction (XRD),ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy,and absorbance spectroscopy.FE-SEM shows that the hierarchical TiO2 film with a thickness of 1.5 μm is composed of a nanosheet overlayer (～0.2 μm height) and the nestlike nanoarray layer (～1.3 μm height).XRD patterns display that the TiO2 films have pure anatase phase structure.UV-Vis spectra reveal enhanced light scattering and dye adsorption ability of the hierarchical TiO2 film.For the dye-sensitized solar cell (DSSC) based on the nanosheet/nestlike nanoarray hierarchical TiO2 film,a short-circuit current (Jac) of 7.79 mA· cm-2,open-circuit voltage (Voc) of 0.80 V,fill factor (FF) of 0.40,and photoelectric conversion efficiency (η) of 2.48％ are achieved.Within the dye-sensitized solar cell,the photoelectric conversion efficiency of the hierarchical TiO2 film was nearky ten times higher than that of nanostructured array film.
