Charge-separation energy in films of π -conjugated organic molecules

I. G. Hill; A. Kahn; Z. G. Soos; R. A. Pascal

doi:10.1016/S0009-2614(00)00882-4

Charge-separation energy in films of π -conjugated organic molecules

I. G. Hill
, A. Kahn
, Z. G. Soos
, R. A. Pascal

Research output: Contribution to journal › Article › peer-review

765 Scopus citations

Abstract

We use inverse photoelectron spectroscopy (IPES) and ultraviolet photoelectron spectroscopy (UPS) to investigate unoccupied and occupied electronic states of five organic semiconductor materials: CuPc (copper phthalocyanine), PTCDA (3,4,9,10-perylenetetracarboxylic dianhydride), α-6T (α-sexithiophene), α-NPD (N,N′-diphenyl-N,N′-bis(l-naphthyl)-l,l′ biphenyl-4,4′′ diamine), and Alq₃ (tris(8-hydroxy-quinoline)aluminum). The transport gap, E_t, is the difference between the highest occupied and lowest unoccupied molecular orbitals, measured via UPS and IPES. The charge separation energy, or exciton binding energy, is the difference between E_t and the optical gap, E_opt, measured via absorption. E_t-E_opt in these correlated materials ranges from 0.4 to1.4 eV.

Original language	English (US)
Pages (from-to)	181-188
Number of pages	8
Journal	Chemical Physics Letters
Volume	327
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(00)00882-4
State	Published - Sep 8 2000

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0009-2614(00)00882-4

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@article{f4bb0293e0074274beb687895722704e,

title = "Charge-separation energy in films of π -conjugated organic molecules",

abstract = "We use inverse photoelectron spectroscopy (IPES) and ultraviolet photoelectron spectroscopy (UPS) to investigate unoccupied and occupied electronic states of five organic semiconductor materials: CuPc (copper phthalocyanine), PTCDA (3,4,9,10-perylenetetracarboxylic dianhydride), α-6T (α-sexithiophene), α-NPD (N,N′-diphenyl-N,N′-bis(l-naphthyl)-l,l′ biphenyl-4,4′′ diamine), and Alq3 (tris(8-hydroxy-quinoline)aluminum). The transport gap, Et, is the difference between the highest occupied and lowest unoccupied molecular orbitals, measured via UPS and IPES. The charge separation energy, or exciton binding energy, is the difference between Et and the optical gap, Eopt, measured via absorption. Et-Eopt in these correlated materials ranges from 0.4 to1.4 eV.",

author = "Hill, \{I. G.\} and A. Kahn and Soos, \{Z. G.\} and Pascal, \{R. A.\}",

note = "Funding Information: Support of this work by the MRSEC program of the National Science Foundation (DMR-9809483) is gratefully acknowledged. One of the authors (I.H.) acknowledges support from the NSERC of Canada.",

year = "2000",

month = sep,

day = "8",

doi = "10.1016/S0009-2614(00)00882-4",

language = "English (US)",

volume = "327",

pages = "181--188",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier B.V.",

number = "3-4",

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TY - JOUR

T1 - Charge-separation energy in films of π -conjugated organic molecules

AU - Hill, I. G.

AU - Kahn, A.

AU - Soos, Z. G.

AU - Pascal, R. A.

N1 - Funding Information: Support of this work by the MRSEC program of the National Science Foundation (DMR-9809483) is gratefully acknowledged. One of the authors (I.H.) acknowledges support from the NSERC of Canada.

PY - 2000/9/8

Y1 - 2000/9/8

N2 - We use inverse photoelectron spectroscopy (IPES) and ultraviolet photoelectron spectroscopy (UPS) to investigate unoccupied and occupied electronic states of five organic semiconductor materials: CuPc (copper phthalocyanine), PTCDA (3,4,9,10-perylenetetracarboxylic dianhydride), α-6T (α-sexithiophene), α-NPD (N,N′-diphenyl-N,N′-bis(l-naphthyl)-l,l′ biphenyl-4,4′′ diamine), and Alq3 (tris(8-hydroxy-quinoline)aluminum). The transport gap, Et, is the difference between the highest occupied and lowest unoccupied molecular orbitals, measured via UPS and IPES. The charge separation energy, or exciton binding energy, is the difference between Et and the optical gap, Eopt, measured via absorption. Et-Eopt in these correlated materials ranges from 0.4 to1.4 eV.

AB - We use inverse photoelectron spectroscopy (IPES) and ultraviolet photoelectron spectroscopy (UPS) to investigate unoccupied and occupied electronic states of five organic semiconductor materials: CuPc (copper phthalocyanine), PTCDA (3,4,9,10-perylenetetracarboxylic dianhydride), α-6T (α-sexithiophene), α-NPD (N,N′-diphenyl-N,N′-bis(l-naphthyl)-l,l′ biphenyl-4,4′′ diamine), and Alq3 (tris(8-hydroxy-quinoline)aluminum). The transport gap, Et, is the difference between the highest occupied and lowest unoccupied molecular orbitals, measured via UPS and IPES. The charge separation energy, or exciton binding energy, is the difference between Et and the optical gap, Eopt, measured via absorption. Et-Eopt in these correlated materials ranges from 0.4 to1.4 eV.

UR - https://www.scopus.com/pages/publications/0001174145

UR - https://www.scopus.com/pages/publications/0001174145#tab=citedBy

U2 - 10.1016/S0009-2614(00)00882-4

DO - 10.1016/S0009-2614(00)00882-4

M3 - Article

AN - SCOPUS:0001174145

SN - 0009-2614

VL - 327

SP - 181

EP - 188

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3-4

ER -

Charge-separation energy in films of π -conjugated organic molecules

Abstract

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