Year

2018

Type(s)

Journal Article

Author(s)

Chulkin, P. and Vybornyi, O. and Lapkowski, M. and Skabara, P.J. and Data, P.

Source

Journal of Materials Chemistry C, 6(5): 1008—1014, 2018

Url

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041490487&doi=10.1039%2fc7tc04599a&partnerID=40&md5=c7af863dafec2fe122c2a87fafb99d54

BibTeX

BibTeX

BibTeX

@ARTICLE{Chulkin20181008, author={Chulkin, P. and Vybornyi, O. and Lapkowski, M. and Skabara, P.J. and Data, P.}, title={Impedance spectroscopy of OLEDs as a tool for estimating mobility and the concentration of charge carriers in transport layers}, journal={Journal of Materials Chemistry C}, year={2018}, volume={6}, number={5}, pages={1008-1014}, doi={10.1039/c7tc04599a}, note={cited By 0}, url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041490487&doi=10.1039%2fc7tc04599a&partnerID=40&md5=c7af863dafec2fe122c2a87fafb99d54}, abstract={The article presents a novel impedance spectroscopy based technique designed to characterise organic light emitting diodes (OLED) during operation. A number of devices based on NPB (N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine) and TPBi (2,2′,2′′-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole)) conducting layers, CBP (4,4′-bis(N-carbazolyl)-1,1′-biphenyl) as a host and BPTZ-DBTO2 (3,6-bis(10H-phenothiazine-10-yl)-9H-fluorene-[dibenzothiophene-S,S-dioxide]) as an emitter were taken as an example to validate the method. Using equivalent electrical circuits, values of capacitance and conductivity of both hole- (HTL) and electron-transport (ETL) layers were determined and analysed separately. Those parameters, as well as current-voltage characteristics, were used to calculate (i) mobility (μ, cm2 V-1 s-1) of both types of charge carriers, (ii) charge density (n, cm-3) of the charge carriers, and (iii) electric field intensity (E, V m-1) in both transport layers as functions of the applied voltage. © 2018 The Royal Society of Chemistry.}, document_type={Article}, source={Scopus},