Electrical and magnetic properties of LiPc and LiPcI

Dumm, M.; Spitzfaden, R.; Lunkenheimer, P.; Dressel, Martin; Loidl, A.; Aβmann, B.; Homborg, H.; Fulde, Peter

doi:10.1016/s0379-6779(96)04213-0

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…There have been several reports on the conductivity, − and the typical value is 10 -3 S cm -1 at room temperature. The temperature dependence is semiconducting with an energy gap of 0.2 eV.…”

Section: 1 Li(pc)mentioning

confidence: 99%

PhthalocyaninesVersatile Components of Molecular Conductors

2004

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Section: 1 Li(pc)mentioning

confidence: 99%

PhthalocyaninesVersatile Components of Molecular Conductors

2004

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“…[13] The electronic structures of LiPcs are experimentally investigated using ultraviolet photoemission spectroscopy. [14,15] The basic electric properties of LiPc and LiPcI x are investigated by Dumm et al [16][17][18] But the details of the relation between the doping rate and electronic structures have not been cleared yet. Traditionally, the transport properties of doped organic semiconductors are explained by the partial oxidation theory; both molecules and dopants are oppositely ionized partially, which makes the molecular originating bands conductive.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structures of Iodine‐Doped Lithium Phthalocyanine Crystals

Oda

Koike

2023

Physica Status Solidi (b)

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The electronic structures and stable doping sites of iodine‐doped lithium phthalocyanine (LiPc) are investigated using a first‐principles calculation based on the density functional theory. It is revealed that the metallic conductivity of highly doped LiPcIx is due to the band originating from the doped iodine, comparing the band structures of several x. It is also revealed that the doped iodines are energetically stable when they are arranged to make a line along the stacking direction that becomes a conducting path. The results well explain the experimental results of the strange dependence of the conductivity of LiPcIx on the doping rate x. These results indicate that there is a new mechanism for the electronic transport of doped organic materials in that the dopant plays the main role, which is completely different from the traditionally accepted partial oxidation theory.

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Soft X-Ray Absorption Spectra of the Lithium Phthalocyanine Radical

et al. 2002

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In near edge X-ray absorption fine structure (NEXAFS) spectra of carbon (C) and nitrogen (N) K-edge regions were measured for the stable radical compound lithium phthalocyanine (LiPc). The observed spectra were compared with those of metal free Pc ( H 2 Pc ), copper Pc (CuPc), and zinc Pc (ZnPc). The spectral features in the C K-edge region of LiPc were different from those of other Pcs in the low photon energy region. An additional peak around 283.5 eV was observed only in the spectrum of LiPc. On the other hand, the spectral features of these MPcs in the N K-edge region were similar and did not show a corresponding extra peak. These results were explained by the patterns of molecular orbitals of these Pcs and the selection rules of X-ray absorption in the localized core-hole picture. The extra peak observed in the C K-edge region is assigned to the excitation from C1s to the highest occupied molecular orbital (HOMO), which is only singly occupied due to the radical nature of the phthalocyanine ring. Group-theoretical consideration indicated that the transition from N1s to the HOMO is not allowed, and this explains the lack of an extra peak at the N K-edge.

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Electrical and magnetic properties of LiPc and LiPcI

Cited by 4 publications

References 7 publications

PhthalocyaninesVersatile Components of Molecular Conductors

PhthalocyaninesVersatile Components of Molecular Conductors

Electronic Structures of Iodine‐Doped Lithium Phthalocyanine Crystals

Soft X-Ray Absorption Spectra of the Lithium Phthalocyanine Radical

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