Two mechanisms of exciton dissociation in rubrene single crystals

Hikmat Najafov; Byunggook Lyu; Ivan Biaggio; Vitaly Podzorov

doi:https://doi.org/10.1063/1.3421539

Two mechanisms of exciton dissociation in rubrene single crystals

Hikmat Najafov, Byunggook Lyu, Ivan Biaggio, Vitaly Podzorov

School of Arts and Sciences, Physics & Astronomy

Rutgers, The State University

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

17 Scopus citations

Abstract

Excitons in rubrene single crystals dissociate into free charge carriers via two mechanisms whose relative importance depends on the illumination wavelength through the optical penetration depth into the crystal. The first mechanism is defect-induced dissociation in less than 10 ns after photoexcitation. For low photoexcitation densities, about 10% of the excitons that survive radiative recombination dissociate through this channel. The second mechanism, affecting the remaining 90% of the excitons, involves a previously reported state localized close to the surface of the crystal that leads to a delayed release of photocarriers a fraction of a millisecond after photoexcitation.

Original language	American English
Article number	183302
Journal	Applied Physics Letters
Volume	96
Issue number	18
DOIs	https://doi.org/10.1063/1.3421539
State	Published - 2010

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Two mechanisms of exciton dissociation in rubrene single crystals",

abstract = "Excitons in rubrene single crystals dissociate into free charge carriers via two mechanisms whose relative importance depends on the illumination wavelength through the optical penetration depth into the crystal. The first mechanism is defect-induced dissociation in less than 10 ns after photoexcitation. For low photoexcitation densities, about 10% of the excitons that survive radiative recombination dissociate through this channel. The second mechanism, affecting the remaining 90% of the excitons, involves a previously reported state localized close to the surface of the crystal that leads to a delayed release of photocarriers a fraction of a millisecond after photoexcitation.",

author = "Hikmat Najafov and Byunggook Lyu and Ivan Biaggio and Vitaly Podzorov",

note = "Funding Information: This research at Lehigh has been supported by the donors of the American Chemical Society Petroleum Research Fund (Grant No. 45741-AC10). The work at Rutgers has been supported by NSF under Grant Nos. DMR-0843985 and ECS-0822036.",

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AU - Najafov, Hikmat

AU - Lyu, Byunggook

AU - Biaggio, Ivan

AU - Podzorov, Vitaly

N1 - Funding Information: This research at Lehigh has been supported by the donors of the American Chemical Society Petroleum Research Fund (Grant No. 45741-AC10). The work at Rutgers has been supported by NSF under Grant Nos. DMR-0843985 and ECS-0822036.

PY - 2010

Y1 - 2010

N2 - Excitons in rubrene single crystals dissociate into free charge carriers via two mechanisms whose relative importance depends on the illumination wavelength through the optical penetration depth into the crystal. The first mechanism is defect-induced dissociation in less than 10 ns after photoexcitation. For low photoexcitation densities, about 10% of the excitons that survive radiative recombination dissociate through this channel. The second mechanism, affecting the remaining 90% of the excitons, involves a previously reported state localized close to the surface of the crystal that leads to a delayed release of photocarriers a fraction of a millisecond after photoexcitation.

AB - Excitons in rubrene single crystals dissociate into free charge carriers via two mechanisms whose relative importance depends on the illumination wavelength through the optical penetration depth into the crystal. The first mechanism is defect-induced dissociation in less than 10 ns after photoexcitation. For low photoexcitation densities, about 10% of the excitons that survive radiative recombination dissociate through this channel. The second mechanism, affecting the remaining 90% of the excitons, involves a previously reported state localized close to the surface of the crystal that leads to a delayed release of photocarriers a fraction of a millisecond after photoexcitation.

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Two mechanisms of exciton dissociation in rubrene single crystals

Abstract

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