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Two 2400 SMUs vs the 4200 for OFET characterisation

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DrPiotr
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Joined: March 6th, 2014, 5:58 am
Country: United Kingdom

Two 2400 SMUs vs the 4200 for OFET characterisation

Post by DrPiotr » March 6th, 2014, 6:24 am

Hello,

so far I have been using the 4200 for characterising OFETs in one of our labs. I have recently set up another lab for doing the same, but under inert atmosphere, so using a nitrogen glovebox. My question now is, can two 2400 units connected together and controlled via Labview achieve the same functionality as one 4200 for OFET characterisation? We are mostly interested in DC characteristics of our devices. I understand that the 4200 has probably higher input impedance than a 2400. How important is timing for transistor characterisation - we are planning to write a Labview VI to be able to control two 2400 together from one computer? Apologies for not knowing this, but I am not an electrical engineer.

Thank you for help!

Norbert W
Keithley Applications
Keithley Applications
Posts: 228
Joined: October 21st, 2010, 7:18 am
Country: Germany

Re: Two 2400 SMUs vs the 4200 for OFET characterisation

Post by Norbert W » March 10th, 2014, 4:07 am

Hello,
in the 4200 its more tightly integrated and you have a common software platform allowing a configuration instead of programming
solution.
(Probably no need to add C-V, pulsing an preamplifier options for your application ...)

If you want to go for a 2x 2400 setup you might consider the free labtracer 2 software if you want to acchieve basic I-V characterization.
Please have a look and see whether the effort of programming on your own can be eliminated ... .

DrPiotr
Posts: 6
Joined: March 6th, 2014, 5:58 am
Country: United Kingdom

Re: Two 2400 SMUs vs the 4200 for OFET characterisation

Post by DrPiotr » March 12th, 2014, 3:09 am

Thank you for help. Does LabTracer still have support for Win 7 and would it accept a connection via RS-232, instead of GPIB? The way I see it is that only GPIB is possible. Also, we need to include a high voltage power supply to be able to apply a relatively high gate bias, as we have a Ketihley 2400 (200 V) and a Keithley 2401 (20 V). So, the 2400 is perfect for both sourcing and measuring, the high V psu only biasing and the other 2401 for measuring gate leakage current.

Norbert W
Keithley Applications
Keithley Applications
Posts: 228
Joined: October 21st, 2010, 7:18 am
Country: Germany

Re: Two 2400 SMUs vs the 4200 for OFET characterisation

Post by Norbert W » March 12th, 2014, 5:45 am

Hello,
yes Labtracer2 needs GPIB as communications interface (check the readme file for tested boards); version 2.9 added support for 2401.
In labtracer you could use a combination of different SourceMeters so 2400 and 2401 combined is possible.

citoz78
Posts: 1
Joined: March 23rd, 2014, 3:18 pm
Country: Turkey

Re: Two 2400 SMUs vs the 4200 for OFET characterisation

Post by citoz78 » March 23rd, 2014, 3:29 pm

Hello,
How can we connect two Keithley 2400 to use them in labtracer for fet characterization? I didn't succeed to use Keithley 2400 together by using labtracer. I choosed them in block diagram of Labtracer but gate power supply didn't work. I use two GBIP cables with series connection on the KUSB 488.

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