电积沉方法制备染料敏化太阳能电池的对电极(英文)

【摘要】：正In recent years,dye-sensitized solar cells(DSSCs) have attracted a lot of attention because of its low cost,easy production and acceptable efficiency compared to conventional inorganic photovoltaic devices.A typical DSSC is composed of a nanocrystalline TiO_2 Anode,a redox electrolyte and a counter electrode(CE).The CE is one of the most important components in the DSSCs because it is used to collect electrons from the external circuit and catalyze the I_3~- reduction. In this study,electrodeposition techniques were utilized to deposit the catalysts,Pt and CoS,on transparent conducting oxide glass substrates as CEs.First,a electrodeposited-Pt CE with low charge-transfer resistance(R_ct),low Pt loading,and high active surface area can be obtained within 30s by using the direct-current deposition in the presence of 3-(2-Aminoethylamino)propyl- methyldimethoxysilane (Me-EDA-Si) as an additive.The addition of appropriate Me-EDA-Si can not only enhance the current efficiency but also inhibit the growth of semicircle-like grains,thus resulting in Pt CE with high active surface area.The DSSC with so-prepared Pt CE exhibited cell efficiency of 7.39%in the presence of 0.01 vol%Me-EDA-Si.Next,porous CoS CEs were further fabricated by using potentiodynamic deposition in a near-neutral solution(pH 6).Noticeably,the use of potentiodynamic deposition mode can facilitate the formation of CoS within the deposit compared to the conventional chronoamperometric deposition.After optimization of sweep cycle and bath composition,the CoS CE with highly porous morphology and multilayer structure can be obtained,thus resulting in a low R_ct of～1.03Ωcm~2.The DSSC assembled with this kind of CoS CE showed a higher photovoltaic conversion efficiency of 6.33%compared to 6.06%for DSSC with the sputtered-Pt CE under full sunlight illumination(100 mW cm~(-2),AM 1.5G). 【作者单位】：Department of Chemical Engineering Tatung University,Taipei 104,Taiwan
【分类号】：TM914.4
【正文快照】： 电积沉方法制备染料敏化太阳能电池的对电极(英文)@Jeng-Yu Lin$Department of Chemical Engineering Tatung University,Taipei 104,Taiwan @Jen-Hung Liao$Department of Chemical Engineering Tatung University,Taipei 104,Taiwan正In recent years,dye-sensitized so

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