Correlation between photoelectric and optical absorption spectra of thermally evaporated pentacene films

Jiyoul Lee, S. S. Kim, Kibum Kim, Jae Hoon Kim, Seongil Im

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The spectral photoresponse of Al/pentacene Schottky junction photodiodes and optical absorption spectra of pentacene films thermally evaporated on glass were measured. The photoelectric response exhibited the genuine highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) transition at 1.97 eV. It was shown that the interband absorption peaks were identified in the optical absorption spectra. The HOMO-LUMO gap energy of 1.97 eV and the fundamental exciton binding energy of 0.15 eV for thin solid pentacene were determined by comparing the complementary measurements.

Original languageEnglish
Pages (from-to)1701-1703
Number of pages3
JournalApplied Physics Letters
Issue number10
Publication statusPublished - 2004 Mar 8


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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