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Title: Silicon Heterojunction Solar Cells: Temperature Impact on Passivation and Performance

Photovoltaic devices deployed in the field can reach operation temperatures (T) as high as 90 °C [1]. Hence, their temperature coefficients (TC1) are of great practical importance as they determine their energy yield. In this study we concentrate on T-related lifetime variations of amorphous/crystalline interfaces and study their influence on the TCs of the individual solar cell parameters. We find that both the open-circuit voltage (Voc) and fill factor (FF) are influenced by these lifetime variations. However, this is only a minor effect compared to the dominant increase of the intrinsic carrier density and the related increase in dark saturation current density. Additionally, in this paper we will show that the TCVoc does not depend solely on the initial value of the Voc [2, 3], but that the structure of the device has to be considered as well.
Authors:
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Publication Date:
OSTI Identifier:
1229769
Report Number(s):
DOE-ASU-6335-018
DOE Contract Number:
EE0006335
Resource Type:
Conference
Resource Relation:
Conference: 5th SiliconPV, Konstanz, Germany, 3/23/15-3/25/15
Research Org:
École Polytechnique Fédérale de Lausanne
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY