无电解沉积用于太阳能电池(英文)

研究分为两部分讨论:(1)是利用无电镀与自组装单分子层表面改质技术制备用于染料敏化太阳能电池上具有催化性的铂对电极;(2)是利用无电镀与微米压印法技术制备硅单晶太阳能电池的电极.适当的表面改质技术(Self-assembled monolayers,SAMs)成功地开发出一低温湿式制程,可制备出具有高度选择性的铂对电极用于透明导电玻璃面上.通过原子力显微镜分析,发现3-(2-Aminoethylamino)propylmethyl-dimethoxysilane(Me-EDA-Si)可成功的改质于透明导电玻璃上,同时利用高解析电子能谱仪来分析每一步骤的改质,证明钯触媒可成功的接于导电玻璃上以催化铂无电镀反应的进行,因而发现经无电镀沉积的薄膜呈现粗糙的表面而提高了铂触媒的活性表面积.因此利用无电镀所制备的铂对电极所组装而成的染料敏化太阳能电池具有较利用溅镀法所制备的铂对电极所组成之电池有较高的效率.为开发制备双层结构(无电镀Ni3P/电镀铜)的电极于硅单晶太阳能电池上作为收集太阳能电池所产生的电子.结合了无电镀与微米压印法来制备无电镀镍金属为导电层以取代传统的银浆.其优点在于利用无电镀镍作为导电层可降低与硅基材之间的接触电阻(NiP为10-4Ω.cm2,银为10-3Ω.cm2),更可大幅的降低线宽(小于40μm).另微米压印法不只能提升电池之效率更可提高模块之功率.在无抗反射层的相同条件下,利用无电镀与微米压印法所制备之电池其效率可高于传统利用银浆所制备之太阳能电池约1%左右的效率.

Application of Electroless Deposition to Solar Cells

It is introduced newly developed cost-effective processes based on electroless deposition for the fabrication of platinum counter electrode(CE)of(1)dye-sensitized solar cells(DSSCs)and(2)front-side conductor of textured mono-crystalline silicon solar cells.A simple and low-temperature process has been developed for the fabrication of Pt CE with superior coating selectivity by means of self-assembled monolayers modification for catalytic step.Atomic force microscope measurement demonstrated that 3-(2-Aminoethylamino)propylmethyl-dimethoxysilane(Me-EDA-Si)was homogeneously grafted on FTO surface and X-ray photoelectron spectrometer proved that the palladium deposited on FTO surface initiates the Pt electroless deposition.The Pt deposit obtained exhibit rough morphology and increased active sites.Moreover,the so-prepared DSSC exhibited improved performance compared to the DSSC with sputtered Pt counter electrode.In the second part,a new process to produce a two-layer(electroless Ni3P/electrodeposited Cu)structure as front-side conductor has been developed.It combines microcontact printing with electroless deposition to deposit NiP film as a conductor.The contacts formed on Si in the as-deposited NiP films are ohmic with a contact resistivity of about 10-4Ω.cm2 which is better than the conventional silver-paste contacts(10-3Ω.cm2)and the width of finger by microcontact printing can be less than 40μm.Furthermore,microcontact printing can increase not only cell efficiency but also module power.Compared with conventional solar cell without antireflection coating,improvement of solar cell efficiency by more than≈1% can be achieved.