TY - GEN
T1 - Extracting Cu diffusion parameters in polycrystalline CdTe
AU - Akis, R.
AU - Brinkman, D.
AU - Sankin, I.
AU - Fang, T.
AU - Guo, D.
AU - Vasileska, Dragica
AU - Ringhofer, Christian
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/15
Y1 - 2014/10/15
N2 - It is well known that Cu plays an important role in CdTe solar cell performance as a dopant. In this work, a finite-difference method is developed and used to simulate Cu diffusion in CdTe solar cells. In the simulations, which are done on a two-dimensional (2D) domain, the CdTe is assumed to be polycrystal-line, with the individual grains separated by grain boundaries. When used to fit experimental Cu concentration data, bulk and grain boundary diffusion coefficients and activation energies for CdTe can be extracted. In the past, diffusion coefficients have been typically obtained by fitting data to simple functional forms of limited validity. By doing full simulations, the simplifying assumptions used in those analytical models are avoided and diffusion parameters can thus be determined more accurately.
AB - It is well known that Cu plays an important role in CdTe solar cell performance as a dopant. In this work, a finite-difference method is developed and used to simulate Cu diffusion in CdTe solar cells. In the simulations, which are done on a two-dimensional (2D) domain, the CdTe is assumed to be polycrystal-line, with the individual grains separated by grain boundaries. When used to fit experimental Cu concentration data, bulk and grain boundary diffusion coefficients and activation energies for CdTe can be extracted. In the past, diffusion coefficients have been typically obtained by fitting data to simple functional forms of limited validity. By doing full simulations, the simplifying assumptions used in those analytical models are avoided and diffusion parameters can thus be determined more accurately.
KW - CdTe
KW - copper
KW - grain boundaries
KW - impurity diffusion
KW - numerical simulation
KW - photovoltaic cells
UR - http://www.scopus.com/inward/record.url?scp=84912103173&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84912103173&partnerID=8YFLogxK
U2 - 10.1109/PVSC.2014.6925635
DO - 10.1109/PVSC.2014.6925635
M3 - Conference contribution
AN - SCOPUS:84912103173
T3 - 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
SP - 3276
EP - 3281
BT - 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 40th IEEE Photovoltaic Specialist Conference, PVSC 2014
Y2 - 8 June 2014 through 13 June 2014
ER -