Lithium doping of semiconducting organic charge transport materials

Lithium doping of semiconducting organic charge transport materials. Parthasarathy, G., Shen, C., Kahn, A., & Forrest, S. R Journal of Applied Physics, 89(9):4986–4992, May, 2001.

Paper doi abstract bibtex

We study the effects of lithium (Li) incorporation in the cathodes of organic light-emitting devices. A thermally evaporated surface layer of metallic Li is found to diffuse through, and subsequently dope, the electron transporting organic semiconducting thin films immediately below the cathode, forming an Ohmic contact. A diffusion length of ∼700 Å is inferred from analyses of the current–voltage and secondary ion mass spectrometry data. The conductivity of the Li-doped organic films is ∼3×10−5 S/cm. Photoemission spectroscopy suggests that Li lowers the barrier to injection at the organic/cathode interface, introduces gap states in the bulk of the organic semiconductor, and dopes the bulk to facilitate efficient charge transport. © 2001 American Institute of Physics.

@article{parthasarathy_lithium_2001,
	title = {Lithium doping of semiconducting organic charge transport materials},
	volume = {89},
	issn = {00218979},
	url = {http://jap.aip.org/resource/1/japiau/v89/i9/p4986_s1},
	doi = {doi:10.1063/1.1359161},
	abstract = {We study the effects of lithium (Li) incorporation in the cathodes of organic light-emitting devices. A thermally evaporated surface layer of metallic Li is found to diffuse through, and subsequently dope, the electron transporting organic semiconducting thin films immediately below the cathode, forming an Ohmic contact. A diffusion length of ∼700 Å is inferred from analyses of the current–voltage and secondary ion mass spectrometry data. The conductivity of the Li-doped organic films is ∼3×10−5 S/cm. Photoemission spectroscopy suggests that Li lowers the barrier to injection at the organic/cathode interface, introduces gap states in the bulk of the organic semiconductor, and dopes the bulk to facilitate efficient charge transport. © 2001 American Institute of Physics.},
	number = {9},
	urldate = {2012-04-05},
	journal = {Journal of Applied Physics},
	author = {Parthasarathy, G. and Shen, C. and Kahn, A. and Forrest, S. R},
	month = may,
	year = {2001},
	pages = {4986--4992},
}

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