Introductory Chapter: Bound Excitons in Gallium Phosphide

Pyshkin, S. L.

doi:10.5772/intechopen.73550

Cited by 1 publication

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“…These articles reflect the high level of activity in the field of exciton dynamics and can be used for an in-depth analysis of the particular topics within the field. Additionally, some recent books and special journal issues covering various aspects of exciton physics of organic semiconductors, materials design, spectroscopy, and device performance are available and can be referred to as a background material. − …”

Section: Introductionmentioning

confidence: 99%

Dynamics of Excitons in Conjugated Molecules and Organic Semiconductor Systems

Dimitriev

2022

Chem. Rev.

109

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The exciton, an excited electron–hole pair bound by Coulomb attraction, plays a key role in photophysics of organic molecules and drives practically important phenomena such as photoinduced mechanical motions of a molecule, photochemical conversions, energy transfer, generation of free charge carriers, etc. Its behavior in extended π-conjugated molecules and disordered organic films is very different and very rich compared with exciton behavior in inorganic semiconductor crystals. Due to the high degree of variability of organic systems themselves, the exciton not only exerts changes on molecules that carry it but undergoes its own changes during all phases of its lifetime, that is, birth, conversion and transport, and decay. The goal of this review is to give a systematic and comprehensive view on exciton behavior in π-conjugated molecules and molecular assemblies at all phases of exciton evolution with emphasis on rates typical for this dynamic picture and various consequences of the above dynamics. To uncover the rich variety of exciton behavior, details of exciton formation, exciton transport, exciton energy conversion, direct and reverse intersystem crossing, and radiative and nonradiative decay are considered in different systems, where these processes lead to or are influenced by static and dynamic disorder, charge distribution symmetry breaking, photoinduced reactions, electron and proton transfer, structural rearrangements, exciton coupling with vibrations and intermediate particles, and exciton dissociation and annihilation as well.

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