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首页> 外文会议>European Photovoltaic Solar Energy Conference and Exhibition >HIGH EFFICIENCY ACHIEVED ON POCl3 EMITTER SI SOLAR CELLS WITH LOW SATURATION CURRENT DENSITY WHILE REDUCING AG CONSUMPTION BY 40-60
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HIGH EFFICIENCY ACHIEVED ON POCl3 EMITTER SI SOLAR CELLS WITH LOW SATURATION CURRENT DENSITY WHILE REDUCING AG CONSUMPTION BY 40-60

机译：降低AG消耗量同时降低饱和电流的POCl3发射硅太阳能电池可实现高效率，同时降低AG消耗40-60％

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The market price of Ag has fluctuated 10X over the past 10 years and has impacted the manufacturingcost of Si solar cells and the price of Si PV. Reduction of Ag consumption can decrease this cost, however, suchreduction may come at the expense of cell performance. In order to address the issue of Ag cost reduction whilemaintaining high cell efficiency, we tailored phosphorus emitter profiles via POCl_3 diffusion to create solar cellemitters displaying low saturation current density (J_(0e)), variable electrically active surface phosphorus concentration([P_(surface)]), and variable sheet resistance with the aim of reducing Ag consumption. By optimizing emitter diffusionconditions, we were able to reduce screen-printed Ag paste consumption by 40 – 60% with no loss in cellperformance. Using a screen-printable Ag conductor paste designed to contact low [P_(surface)] emitters, we comparedthe performance of cells with screen-printed Ag paste dry masses of 200, 120, and 80 mg. Using a tailored Low J_(0e) 55Ω/sq emitter, high open circuit voltage (V_(OC)) and short circuit current (J_(SC)) are achieved to give average cellefficiencies of 18.64% and 18.73% for 120 mg and 80 mg Ag paste dry mass, respectively. This is compared toefficiencies of 18.52% and 18.21% for cell using industrial-type 65 Ω/sq emitter with 120 and 80 mg Ag paste drymass, respectively. Based on US$32/Troy oz. Ag market price and 85% by weight thick film paste Ag metal content,Ag front side metallization cost of US￠2.11/W can be achieved by using 80 mg Ag paste dry mass. This is comparedto US￠3.19/W (33% cost savings) and US￠5.44/W (60% cost savings) for use of 120 and 200 mg Ag paste dry mass,respectively, on industrial-type emitter.
机译：在过去的10年中，Ag的市场价格波动了10倍，并影响了制造业 硅太阳能电池的成本和硅光伏的价格。减少银的消耗可以降低该成本，但是，这样 减少可能会以牺牲电池性能为代价。为了解决Ag成本降低的问题， 为保持高电池效率，我们通过POCl_3扩散量身定制了磷发射器轮廓，以制造太阳能电池 发射极显示出低饱和电流密度（J_（0e）），电活性表面磷浓度可变 （[P_（surface）]）和可变薄层电阻，以减少Ag消耗。通过优化发射极扩散 在一定条件下，我们能够将丝网印刷的银浆消耗量降低40 – 60％，而不会损失电池 表现。使用设计用于接触低[P_（surface）]发射极的可丝网印刷的Ag导体浆料，我们进行了比较 丝网印刷的银浆干质量分别为200、120和80 mg时电池的性能。使用量身定制的Low J_（0e）55 Ω/ sq发射极，高开路电压（V_（OC））和短路电流（J_（SC））获得平均电池 120 mg和80 mg Ag糊料干质量的效率分别为18.64％和18.73％。相比之下 使用工业型65Ω/ sq发射极并干燥120和80 mg Ag糊后的电池效率分别为18.52％和18.21％ 质量。基于US $ 32 / Troy盎司。 Ag市场价格和85％重量比的厚膜糊中的Ag金属含量， 通过使用80 mg的银膏干质量，可以实现US ￠ 2.11 / W的银正面金属化成本。比较一下 使用120和200 mg的银浆干质量，分别达到US $ 3.19 / W（节省33％的成本）和US ￠ 5.44 / W（节省60％的成本）， 分别放在工业型发射器上。

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