Doping of poly-Si contacts for high efficiency back junction back contact silicon solar cells using inkjet-printed doping sources

如今，最高的晶硅太阳能电池效率是通过使用载流子选择接触，如背面接触的多晶硅接触来实现的。然而，当与多晶硅接触结合使用时，制备背接触太阳电池掺杂区的常用方法需要复杂得多的制备方法。在本项目中，将研究基于喷墨技术的载流子选择多晶硅接触的局部掺杂工艺。这可以使制造高效率背接触太阳能电池的方法简单得多。为了达到这一目的，我们将研究商用旋转式掺杂剂浆料和高掺杂硅纳米颗粒油墨。

Today, highest crystalline silicon solar cell efficiencies are achieved by using carrier selective contacts, like poly-Si contacts, on back contacted solar cells. Common methods for the fabrication of the doped regions of back contacted solar cells, however require much more complex fabrication methods when utilized in combination with poly-Si contacts.In this project inkjet based processes for the local doping of carrier selective poly-Si contacts will be investigated. This could enable a much simplified method for the fabrication of high efficiency back contacted solar cells. Both, commercial spin-on dopant pastes and highly doped silicon nano-particle inks will be investigated for this purpose.