Influence of Contact Firing Conditions on the Characteristics of bi-facial n-type Silicon Solar Cells Using Ag/Al Pastes | Zendy

Alexander Frey | Zendy; Susanne Fritz | Zendy; Josh Engelhardt | Zendy; Giso Hahn | Zendy; Barbara Terheiden | Zendy

Open Access

Influence of Contact Firing Conditions on the Characteristics of bi-facial n-type Silicon Solar Cells Using Ag/Al Pastes

Author(s) -

Alexander Frey,

Susanne Fritz,

Josh Engelhardt,

Giso Hahn,

Barbara Terheiden

Publication year - 2016

Publication title -

energy procedia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.474

H-Index - 81

ISSN - 1876-6102

DOI - 10.1016/j.egypro.2016.07.102

Subject(s) - saturation current , materials science , silicon , boron , scanning electron microscope , analytical chemistry (journal) , solar cell , diffusion , saturation (graph theory) , diode , optoelectronics , composite material , chemistry , electrical engineering , physics , organic chemistry , chromatography , voltage , thermodynamics , engineering , mathematics , combinatorics

In this study we investigate metal spike formation of screen-printed Ag/Al pastes during contact firing in an infrared belt furnace and its influence on the characteristics of n-type bi-facial silicon solar cells. The boron emitters are formed in a co-diffusion step using boron doped PECVD layers. It is demonstrated that the formation of Ag/Al spikes results in strong FF and VOC losses limiting the solar cell efficiency. This can mainly be attributed to an increased saturation current density of the second diode which is strongly increasing with increasing set peak firing temperature. A detailed scanning electron microscopy analysis reveals that this j02 increase can be attributed to an increasing area density and depth of the Ag/Al spikes for increasing peak firing temperatures

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