Dear all,
I have right now a problem with measuring the charge mobility of different polymers. I have built different types of thin layers OLEDs using different thickness types of polymers. In order to validate my results, I was using a testing model where I have a 3 layer device: ITO/polymer under test/Au. Since I want to characterize each different polymer with a specific layer thickness, I used this model to measure the Voltage/Current response. Unfortunately, as a result, I got a resistance response, instead of an expected diode curve. I am not sure the reasons why, I am not sure if this method is only valid for polymer thicknesses above 30 nm since some of my samples are 10 or even 9 nm. Another reason, that I am guessing, is that maybe I have measured too fast since I used an automated source that was taking a measurement every 25 mV.
Last but not least, I could measure the polymer-diode curve when I have a sample that contains more than one hole transport layer or electron transport layer. The problem, in this case, comes due to the calculation of the charge mobility. Since I am using the Mott-Guerney law and the coefficient of specific permittivity is exclusive for every single material. Is it possible to add or multiply the permittivity coefficients in order to calculate the mobility for a mix of multiple polymers?
I would like to thank and appreciate all your comments in advance.
Best regards,
Dear Abdel Ruvalcaba Perez, please check the following documents. My Regards
https://www.researchgate.net/publication/316924273_Charge_mobility_measurement_techniques_in_organic_semiconductors
https://www.researchgate.net/publication/224403376_Charge-carrier_mobility_in_an_organic_semiconductor_thin_film_measured_by_photoinduced_electroluminescence
https://doi.org/10.1002/polb.23103
https://doi.org/10.1016/0032-3950(87)90337-6
https://doi.org/10.1016/j.orgel.2014.02.008
https://www.nature.com/articles/ncomms14975
Dear Abdel Ruvalcaba Perez, please check the following documents. My Regards
https://www.researchgate.net/publication/316924273_Charge_mobility_measurement_techniques_in_organic_semiconductors
https://www.researchgate.net/publication/224403376_Charge-carrier_mobility_in_an_organic_semiconductor_thin_film_measured_by_photoinduced_electroluminescence
https://doi.org/10.1002/polb.23103
https://doi.org/10.1016/0032-3950(87)90337-6
https://doi.org/10.1016/j.orgel.2014.02.008
https://www.nature.com/articles/ncomms14975
Dear Perez
Follow this article ...Charge mobility measurement techniques in organic semiconductor. Sanjay Tiwari N. C. Greenham
Optical and Quantum Electronics, 41, 69–89(2009)
Dear Dr. Abdel Ruvalcaba Perez, you can visit the following links:
Applied Physics Letters 88(24):242101-242101-3 (DOI: 10.1063/1.2212273)
Optical and Quantum Electronics 41:69-89: January 2009
https://doi.org/10.1016/j.orgel.2014.02.008
Best Regards
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