Open AccessPHOTO-INDUCED ULTRATAST PROCESS OF RELAXATION IN POLYMER
Author(s) -
Yu Zhigang,
Huang Qingfeng,
Sun X
Publication year - 1993
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.42.1822
Subject(s) - bipolaron , component (thermodynamics) , excitation , relaxation (psychology) , lattice (music) , physics , phonon , condensed matter physics , polaron , polymer , radiative transfer , materials science , electron , quantum mechanics , nuclear magnetic resonance , acoustics , psychology , social psychology
On the basis of multi-phonon transition theory, the origin of the fast component(100 fs) and the slow component (ns) in photo-excitation dynamics is explained and their evolution time is calculated. From these results, it is seen that the fast component is due to the formation of neutral bipolaron from free electron-hole pair, and the slow one is due to the non-radiative decay of bipolaron. The equations motion of the lattice are also integrated in real time to simulate the formation of bipolaron.