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首页> 外文会议>European Photovoltaic Solar Energy Conference and Exhibition >INNOVATIVE LOW TEMPERATURE SINTERING, HIGH ADHESION, LOW CONTACT RESISTANCE SCREEN PRINTABLE SILVER PASTE FOR A-SI:H/C-SI HETEOJUNCTIONS
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INNOVATIVE LOW TEMPERATURE SINTERING, HIGH ADHESION, LOW CONTACT RESISTANCE SCREEN PRINTABLE SILVER PASTE FOR A-SI:H/C-SI HETEOJUNCTIONS

机译：用于A-SI：H / C-SI异质结的创新型低温烧结，高附着力，低接触电阻丝网印刷银浆

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摘要

Amorphous/crystalline silicon heterojunction is the most attractive technique to obtain high efficiency solar cells. The emitter of these cells is usually covered by Transparent Conductive Oxides (TCO) that ensures lateral conductivity and Anti Reflection Coating (ARC). Then the cell front side is completed by a metal grid, made by screen printed silver, sintered at temperature below 200°C. Both the TCO and the grid strongly influence the cell series resistance as well as the cell efficiency. The choice of TCO needs to be tuned in order to ensurethe lowest sheet resistance and an appropriate workfunction to fit the emitter requirements. Consequentlythe front screen printed grid needs to be optimized to produce the lowest specific contactresistance with the underneath TCO. In this work we show the results obtained developing an innovative low temperature curing, polymeric based, screen printable silver paste. High linear conductivity, low specific contact resistivity and strong adhesion to TCO have been reached. Specific contact resistivity as low as 0.15mΩcm~2 and printed Ag bulk resistivity of 20μΩcm have been reached on TCO film having sheet resistance in the range between 40 and 200 Ω/sq.
机译：非晶/晶体硅异质结是获得高效太阳能电池的最有吸引力的技术。这些电池的发射极通常被透明导电氧化物（TCO）覆盖，以确保横向导电性和抗反射涂层（ARC）。然后，电池的正面由丝网印刷的银制成的金属格栅完成，并在低于200°C的温度下烧结。 TCO和栅极都强烈影响电池串联电阻以及电池效率。需要调整TCO的选择，以确保最低的薄层电阻和合适的功函数以满足发射器的要求。因此，需要对前丝网印刷的网格进行优化，以使其与下方的TCO的接触电阻最低。在这项工作中，我们展示了开发创新的低温固化，聚合物基，可丝网印刷的银浆所获得的结果。已经实现了高线性电导率，低比接触电阻率和对TCO的强粘附性。在薄层电阻在40至200Ω/ sq之间的TCO薄膜上，可实现低至0.15mΩcm〜2的比接触电阻率和20μΩcm的印刷Ag体电阻率。

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