Microstructural comparison of silicon solar cells’ front-side Ag contact and the evolution of current conduction mechanisms

Autor:	A. S. Ionkin, Kurt Richard Mikeska, M. E. Lewittes, Lap Kin Cheng, L. Liang, Z. G. Li, B. M. Fish
Rok vydání:	2011
Předmět:	Materials science Silicon General Physics and Astronomy chemistry.chemical_element Nanotechnology Microstructure Conductor law.invention chemistry Electrical resistivity and conductivity law Crystallite Electron microscope Composite material Quantum tunnelling Common emitter
Zdroj:	Journal of Applied Physics. 110:074304
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.3642956
Popis:	Microstructures of front-side Ag contact of crystalline Si solar cells fired at temperatures from below to above optimal were systematically investigated using advanced electron microscopy. Ag pastes studied included commercial pastes and an experimental paste containing nano-sized metallic Zn additive. Microstructures of optimally fired cells determined from cross-sectional and top-view images were found to be consistent with a primary tunneling mechanism for current flow (a “nano-Ag colloids assisted tunneling” model) due to the lack of Ag crystallites connecting the silver conductor line to the silicon emitter. We mapped the evolution of the interfacial microstructures across the firing temperature window and correlated it with cell performance. Our result sheds light on the relative importance of the two current transport models as the peak firing temperature was swept from below to above optimal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::759c286e5873adf59ef0e8ddc734a78d https://doi.org/10.1063/1.3642956 Zobrazit plný text záznamu