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The Role of Nano-crystallites on Conduction Mechanisms of Current Through Ag Gridlines of Si Solar Cells

Published online by Cambridge University Press:  01 February 2019

Keming Ren ,
Tang Ye ,
Yong Zhang  and
Abasifreke Ebong
Keming Ren*
Affiliation:
University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, NC28223, U.S.A
Tang Ye
Affiliation:
University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, NC28223, U.S.A
Yong Zhang
Affiliation:
University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, NC28223, U.S.A
Abasifreke Ebong
Affiliation:
University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, NC28223, U.S.A
*
*(Email: [email protected])
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Abstract

In order to understand the impact of nano-crystallites on current transport mechanisms in screen-printed c-Si solar cells with lowly-doped emitter, Te-glass based Ag pastes with different transition temperatures (Tg) were used. The Te-glass with lower Tg showed lower Rc than the one with higher Tg due to the formation of nano-crystallites in the glass layer. These nano-crystallites enhance the conductivity of the glass and lead to higher fill factor (FF). The nature of these nano-crystallites was first identified by the Raman spectrometry and the peaks at 76 cm-1, 119 cm-1 and 145 cm-1 were corresponding to Ag2Te and PbTe. The conductive-AFM further confirmed the high conductivity of these nano-crystallites without pyramidal Ag crystallites, which means the current transporting from Si emitter to Ag gridlines is mainly through the nano-crystallites in the glass.

Keywords

nanoscalephotovoltaicglassTeAg
Type
Articles
Information
MRS Advances , Volume 4 , Issue 5-6: Nanomaterials , 2019 , pp. 311 - 318
Copyright
Copyright © Materials Research Society 2019 

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