Journal ArticleDOI
Expanded Theory of H- and J-Molecular Aggregates: The Effects of Vibronic Coupling and Intermolecular Charge Transfer.
TLDR
This review outlines advances made in understanding the relationship between aggregate structure and photophysics when vibronic coupling and intermolecular charge transfer are incorporated.Abstract:
The electronic excited states of molecular aggregates and their photophysical signatures have long fascinated spectroscopists and theoreticians alike since the advent of Frenkel exciton theory almost 90 years ago. The influence of molecular packing on basic optical probes like absorption and photoluminescence was originally worked out by Kasha for aggregates dominated by Coulombic intermolecular interactions, eventually leading to the classification of J- and H-aggregates. This review outlines advances made in understanding the relationship between aggregate structure and photophysics when vibronic coupling and intermolecular charge transfer are incorporated. An assortment of packing geometries is considered from the humble molecular dimer to more exotic structures including linear and bent aggregates, two-dimensional herringbone and “HJ” aggregates, and chiral aggregates. The interplay between long-range Coulomb coupling and short-range charge-transfer-mediated coupling strongly depends on the aggregate ...read more
Citations
More filters
Journal ArticleDOI
Ultra-Narrowband Photodetector with High Responsivity Enabled by Integrating Monolayer J-Aggregate Organic Crystal with Graphene
Beilei Sun,Guodong Zhou,Yi Wang,Xin Xu,Li Tao,Ni Zhao,Hon Ki Tsang,Xinran Wang,Zefeng Chen,Jianbin Xu +9 more
Journal ArticleDOI
cis-Silicon phthalocyanine conformation endows J-aggregated nanosphere with unique near-infrared absorbance and fluorescence enhancement: a tumor sensitive phototheranostic agent with deep tissue penetrating ability.
Jiabao Pan,Ancheng Ouyang,Wenjuan Fang,Guanghui Cheng,Wei Liu,Fang Wang,Dongmu Zhao,Kai Le,Jianzhuang Jiang +8 more
TL;DR: In the present work, intramolecular hydrogen bonding was formed between the two long and flexible axial NH2-terminated diethylene glycol ligands of the amphiphilic SiPc molecule, leading to the employment of a cis-conformation of this molecule according to the 1H-NMR spectroscopy result, which exhibited significantly enhanced red-shifted absorption in the NIR range of 750-850 nm and fluorescence emission.
Journal ArticleDOI
Modeling nonlocal electron–phonon coupling in organic crystals using interpolative maps: The spectroscopy of crystalline pentacene and 7,8,15,16-tetraazaterrylene
TL;DR: In this article, a mixed quantum-classical approach for including nonlocal coupling into spectroscopic and transport models for organic crystals is presented. But the model does not assume that the non-local coupling is linear in contrast to most modern charge-transport models.
Journal ArticleDOI
Li+ and Oxidant Addition To Control Ionic and Electronic Conduction in Ionic Liquid-Functionalized Conjugated Polymers
Dakota Rawlings,Dongwook Lee,Jeongmin Kim,Ioan-Bogdan Magdau,Gordon Pace,Peter M. Richardson,Elayne M. Thomas,Scott P. O. Danielsen,Sarah H. Tolbert,Thomas F. Miller,Ram Seshadri,Rachel A. Segalman +11 more
TL;DR: In this paper, Rawlings, Dakota; Lee, Dongwook; Kim, Jeongmin; MagdAu, Ioan-Bogdan; Pace, Gordon; Richardson, Peter M; Thomas, Elayne M; Danielsen, Scott P. O; Tolbert, Sarah H; Miller, Thomas F; Seshadri, Ram; Segalman, Rachel A
Journal ArticleDOI
Control of Intrachain Morphology in the Formation of Polyfluorene Aggregates on the Single‐Molecule Level
TL;DR: This work investigates the π‐conjugated polymer poly(9,9‐dioctylfluorene) (PFO), which can exist in three distinctly different structural phases: the α‐, β‐, and γ‐phase, and examines the PL spectrum of single PFO chains embedded in a non‐fluorescent matrix to avoid ensemble averaging.
References
More filters
Journal ArticleDOI
Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
TL;DR: In this article, an upper theoretical limit for the efficiency of p−n junction solar energy converters, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of holeelectron pairs is radiative as required by the principle of detailed balance.
Journal ArticleDOI
Coherence in Spontaneous Radiation Processes
TL;DR: In this article, the authors considered a radiating gas as a single quantum-mechanical system, and the energy levels corresponding to certain correlations between individual molecules were described, where spontaneous emission of radiation in a transition between two such levels leads to the emission of coherent radiation.
Journal ArticleDOI
Organic Thin Film Transistors for Large Area Electronics
TL;DR: In this article, the authors present new insight into conduction mechanisms and performance characteristics, as well as opportunities for modeling properties of organic thin-film transistors (OTFTs) and discuss progress in the growing field of n-type OTFTs.
Journal ArticleDOI
Charge transport in organic semiconductors.
Veaceslav Coropceanu,Jérôme Cornil,Demetrio A. da Silva Filho,Yoann Olivier,Robert J. Silbey,Jean-Luc Brédas +5 more
TL;DR: Electronic Coupling in Oligoacene Derivatives: Factors Influencing Charge Mobility, and the Energy-Splitting-in-Dimer Method 3.1.