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A Theoretical Study of Photocurrent in Conjugated Polymer Systems
Author(s) -
Chang R.,
Lin S. H.
Publication year - 1999
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199900092
Subject(s) - chemistry , conjugated system , photocurrent , photoionization , polymer , dissociation (chemistry) , photoelectric effect , quantum tunnelling , photochemistry , spectral line , chemical physics , molecular physics , optoelectronics , atomic physics , quantum mechanics , organic chemistry , ion , physics , ionization
We present a theory of photocurrent spectra for a light‐emitting diode fabricated by a π‐conjugated polymer system. The tunneling through a barrier induced by the DC field dominates the dissociation of excitor states (i.e., photoionization of vibronic states) below the threshold. The spectra thus obtained explain most of the experimental results and also allows us to more easily position the S 2 state and other higher states in the conjugated polymer.