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 Varshini fitting - Low temperature PL - InGaN

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T O P I C    R E V I E W
physgopal Posted - 11/16/2015 : 12:24:29 AM


Dear All,
Can anyone tell how to fit a varshini fitting and the parameter values such as alpha and beta for InGaN material. i tried many times, but the fitting line shows the straight line rather than exponential curve with the experimental data. Please give me a suggestions..

Thanking you...
M.Gopalakrishnan

M.Gopalakrishnan
3   L A T E S T    R E P L I E S    (Newest First)
jasonzhao Posted - 11/17/2015 : 01:06:23 AM
Hello,


It seems not a complex function, but it may not show an exponential shape when B is rather small,
You can use this tool to plot the curve:
http://www.originlab.com/doc/Origin-Help/PD-Dialog-2DFunc-Tab
Then you will see the curve shape at different parameter.


Best regards!
Jason
OriginLab Technical Service
physgopal Posted - 11/17/2015 : 12:30:53 AM
Dear Jasonzhao,
thank you so much for your reply. This is the function,
E(T)=E(0)-AT^2/(T+B)
where A is Alpha and B is Beta..

M.Gopalakrishnan
jasonzhao Posted - 11/16/2015 : 02:31:20 AM
Hello,

Would you please tell us that what's the function formula? or show us a simple example?

Best regards!
Jason
OriginLab Technical Service

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