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Communication Dans Un Congrès Année : 2019

TCO contacts on poly-Si layers: High and low temperature approaches to maintain passivation and contact properties

Résumé

Polysilicon (poly-Si) based passivating contacts are promising to improve silicon solar cells conversion efficiency. Thin poly-Si layers usually feature high sheet resistances compared to conventional diffused junctions. Therefore the use of Transparent Conductive Oxides (TCO) has to be considered to improve lateral conductivity while maintaining good optical and surface passivation properties. Standard sputtered Indium Tin Oxide (ITO) can alter the poly-Si passivation properties. In this work different TCO-based contacts have been investigated (various materials and deposition techniques) in order to contact phosphorus-doped poly-Si layers (n+ poly-Si). The TCO-deposited samples experienced both low and high temperature annealing steps. Implied open circuit voltage above 730 mV and contact resistivity below 50 mΩ.cm2 at the TCO/n+ poly-Si interface have been obtained for both high and low temperature approaches. Thus such novel structures are very promising to contact poly-Si layers.

Dates et versions

hal-03770931 , version 1 (06-09-2022)

Identifiants

Citer

Elise Bruhat, Thibaut Desrues, Danièle Blanc-Pélissier, Benoît Martel, Raphaël Cabal, et al.. TCO contacts on poly-Si layers: High and low temperature approaches to maintain passivation and contact properties. 9th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2019, Apr 2019, Leuven, Belgium. ⟨10.1063/1.5123828⟩. ⟨hal-03770931⟩
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