Diffusion-Reaction Modeling of Cu Migration in CdTe Solar Devices

Conference · Fri Sep 04 00:00:00 EDT 2015

OSTI ID:1237014

Guo, Da ^[1]; Brinkman, Daniel ^[1]; Fang, Tian ^[2]; Akis, Richard ^[1]; Sankin, Igor ^[2]; Vasileska, Dragica ^[1]; Ringhofer, Christian ^[1]

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1. Arizona State Univ., Tempe, AZ (United States)
2. First Solar Inc.

In this work, we report on development of one-dimensional (1D) finite-difference and two-dimensional (2D) finite-element diffusion-reaction simulators to investigate mechanisms behind Cu-related metastabilities observed in CdTe solar cells [1]. The evolution of CdTe solar cells performance has been studied as a function of stress time in response to the evolution of associated acceptor and donor states. To achieve such capability, the simu-lators solve reaction-diffusion equations for the defect states in time-space domain self-consistently with the free carrier transport. Re-sults of 1-D and 2-D simulations have been compared to verify the accuracy of solutions.

• Research Organization: Arizona State Univ., Tempe, AZ (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: EE0006344
• OSTI ID: 1237014
• Report Number(s): DOE-ASU-0006344-4
• Resource Relation: Conference: IWCE 2015 (West Lafayette, IN, 2015)
• Country of Publication: United States
• Language: English