Large‐Area PEDOT:PSS/c‐Si Heterojunction Solar Cells With Screen‐Printed Metal Contacts,Solar RRL

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Large‐Area PEDOT:PSS/c‐Si Heterojunction Solar Cells With Screen‐Printed Metal Contacts
Solar RRL ( IF 6.0 ) Pub Date : 2018-02-12 , DOI: 10.1002/solr.201700191
Dimitri Zielke ₁ , Ralf Gogolin ₁ , Marc-Uwe Halbich ₁ , Cornelia Marquardt ₁ , Wilfried Lövenich ₂ , Rüdiger Sauer ₂ , Jan Schmidt _{1,

3}

Affiliation

A large‐area BackPEDOT solar cell with a phosphorus‐diffused emitter and a high‐temperature‐fired screen‐printed Ag grid on the front surface and PEDOT:PSS as hole‐collecting and passivating layer at the cell rear is developed. As base material, 15.6 × 15.6 cm² pseudo‐square industrial‐type boron‐doped p‐type Czochralski‐grown silicon wafers are used. The set‐peak firing temperature (T_set) is varied from 850 to 870 °C with a total number of 32 processed solar cells. The optimum T_set of 870 °C results in a median solar cell efficiency of 19.0%. The best large‐area BackPEDOT solar cell achieves an efficiency of 20.2%. Based on external quantum efficiency measurements, a rear surface recombination velocity S_rear < 70 cm s⁻¹ is determined, a value which is on a par with today's industrial high‐efficiency solar cells. Furthermore, a low‐temperature metal paste is introduced, which is shown to be capable of metalizing the PEDOT:PSS‐covered rear surface of the solar cells without damaging the rear surface passivation. The principle feasibility of such a rear metallization scheme is demonstrated. The parasitic absorption of infrared light within the PEDOT:PSS layer is identified as the major loss mechanism in the current cells, which might be overcome in the future by adding infrared‐transparent additives to the PEDOT:PSS dispersion.

中文翻译：

具有丝网印刷金属触点的大面积PEDOT：PSS / c-Si异质结太阳能电池

开发了一种大面积的BackPEDOT太阳能电池，该电池的前表面带有磷扩散的发射极，并经高温烧制，丝网印刷的Ag网格，而PEDOT：PSS作为电池后部的空穴收集和钝化层。作为基材，使用了15.6×15.6 cm ^2的伪正方形工业型掺硼p型切克劳斯基生长的硅片。设定峰值烧成温度（T _set）在850至870°C之间变化，共有32个已处理的太阳能电池。最佳的T_设定为870°C，太阳能电池的中值效率为19.0％。最好的大面积BackPEDOT太阳能电池可实现20.2％的效率。根据外部量子效率测量，后表面重组速度小号_后部 <70厘米小号^-1被确定，一个值，该值与当今的工业的高效率的太阳能电池相媲美。此外，还引入了一种低温金属浆料，该浆料能够在不损坏背面钝化的情况下使PEDOT：PSS覆盖的太阳能电池背面金属化。证明了这种后金属化方案的原理可行性。PEDOT：PSS层中红外光的寄生吸收被确定为当前电池的主要损耗机制，将来可以通过在PEDOT：PSS分散体中添加红外透明添加剂来克服。

更新日期：2018-02-12

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