物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2015年
1期
121-127
,共7页
桃李%霍志鹏%王露%戴松元
桃李%霍誌鵬%王露%戴鬆元
도리%곽지붕%왕로%대송원
染料敏化太阳电池%准固态%电解质%有机小分子胶凝剂%N,N'-1,5-戊二基双月桂酰胺
染料敏化太暘電池%準固態%電解質%有機小分子膠凝劑%N,N'-1,5-戊二基雙月桂酰胺
염료민화태양전지%준고태%전해질%유궤소분자효응제%N,N'-1,5-무이기쌍월계선알
Dye-sensitized solar cel%Quasi-solid-state%Electrolyte%Low molecular mass organogelator%N,N'-1,5-pentanediylbis-dodecanamide
染料敏化太阳电池(DSC)以其低价、高效等优势,成为学术界和工业界的研究热点.传统液态电解质由于易挥发、易泄漏等问题,导致基于液态电解质的电池难以保持长期稳定,影响光伏技术的应用.本文合成了N,N'-1,5-戊二基双月桂酰胺,将其作为有机小分子胶凝剂(LMOG)胶凝离子液体电解质(ILE)制备了离子凝胶电解质(IGE)并组装成准固态电池(QS-DSCs).差示扫描量热测试显示该凝胶电解质的相转变温度(Tgel)为104.7°C,具有良好的本征热稳定性.利用循环伏安法、电化学阻抗谱、调制光电压/光电流谱分别研究了液态电池和准固态电池内部电子传输和复合动力学过程.结果表明,凝胶电解质的三维网络结构加速了TiO2光阳极/电解质界面电子与电解质中I3-的复合过程,使电子寿命降低,导致准固态电池的光电转换效率略低于液态电池.在AM 1.5(100 mW?cm-2)及50°C条件下的加速老化测试结果显示,持续老化1000 h 后其光电转换效率(η)无衰减,而液态电池的光电转换效率衰减为初始值的86%,表明准固态电池具有良好的光热稳定性.
染料敏化太暘電池(DSC)以其低價、高效等優勢,成為學術界和工業界的研究熱點.傳統液態電解質由于易揮髮、易洩漏等問題,導緻基于液態電解質的電池難以保持長期穩定,影響光伏技術的應用.本文閤成瞭N,N'-1,5-戊二基雙月桂酰胺,將其作為有機小分子膠凝劑(LMOG)膠凝離子液體電解質(ILE)製備瞭離子凝膠電解質(IGE)併組裝成準固態電池(QS-DSCs).差示掃描量熱測試顯示該凝膠電解質的相轉變溫度(Tgel)為104.7°C,具有良好的本徵熱穩定性.利用循環伏安法、電化學阻抗譜、調製光電壓/光電流譜分彆研究瞭液態電池和準固態電池內部電子傳輸和複閤動力學過程.結果錶明,凝膠電解質的三維網絡結構加速瞭TiO2光暘極/電解質界麵電子與電解質中I3-的複閤過程,使電子壽命降低,導緻準固態電池的光電轉換效率略低于液態電池.在AM 1.5(100 mW?cm-2)及50°C條件下的加速老化測試結果顯示,持續老化1000 h 後其光電轉換效率(η)無衰減,而液態電池的光電轉換效率衰減為初始值的86%,錶明準固態電池具有良好的光熱穩定性.
염료민화태양전지(DSC)이기저개、고효등우세,성위학술계화공업계적연구열점.전통액태전해질유우역휘발、역설루등문제,도치기우액태전해질적전지난이보지장기은정,영향광복기술적응용.본문합성료N,N'-1,5-무이기쌍월계선알,장기작위유궤소분자효응제(LMOG)효응리자액체전해질(ILE)제비료리자응효전해질(IGE)병조장성준고태전지(QS-DSCs).차시소묘량열측시현시해응효전해질적상전변온도(Tgel)위104.7°C,구유량호적본정열은정성.이용순배복안법、전화학조항보、조제광전압/광전류보분별연구료액태전지화준고태전지내부전자전수화복합동역학과정.결과표명,응효전해질적삼유망락결구가속료TiO2광양겁/전해질계면전자여전해질중I3-적복합과정,사전자수명강저,도치준고태전지적광전전환효솔략저우액태전지.재AM 1.5(100 mW?cm-2)급50°C조건하적가속노화측시결과현시,지속노화1000 h 후기광전전환효솔(η)무쇠감,이액태전지적광전전환효솔쇠감위초시치적86%,표명준고태전지구유량호적광열은정성.
Dye-sensitized solar cel s (DSCs) have aroused much interest because of their low cost and comparatively high power conversion efficiency. Stability is paramount for any photovoltaic technology. Traditional liquid electrolytes tend to leak and evaporate, which limits the long-term performance of the DSC. N,N'-1,5-Pentanediylbis-dodecanamide was synthesized and used as a low molecular mass organogelator (LMOG), to gelate an ionic liquid electrolyte (ILE) and fabricate a quasi-solid-state DSC (QS-DSC). Differential scanning calorimetry indicated that the gel-to-solution transition temperature of the ionic gel electrolyte (IGE) was 104.7 °C, which indicated good intrinsic stability. Electron transport and recombination were investigated by cyclic voltammetric (CV) and electrochemical impedance measurements, and intensity-modulated photocurrent and photovoltage spectroscopy (IMPS and IMVS) measurements. Electron recombination at the TiO2 photoanode/electrolyte interface was accelerated by the cross-linked gel network. The shorter electron recombination lifetime decreased the photoelectric conversion efficiency of the QS-DSC, compared with the ILE-based DSC. The photoelectric conversion efficiency of the QS-DSC exhibited no change during accelerated aging test for 1000 h, while that of the ILE-based DSC decreased to 86% of its initial value.
