Charge formation, recombination, and sweep‐out dynamics in organic solar cells

SR Cowan, N Banerji, WL Leong… - Advanced Functional …, 2012 - Wiley Online Library
This article presents a critical discussion of the various physical processes occurring in
organic bulk heterojunction (BHJ) solar cells based on recent experimental results. The …

Near-IR femtosecond transient absorption spectroscopy of ultrafast polaron and triplet exciton formation in polythiophene films with different regioregularities

J Guo, H Ohkita, H Benten, S Ito - Journal of the American …, 2009 - ACS Publications
The formation dynamics of polaron pairs, polarons, and triplet excitons in regiorandom and
regioregular poly (3-hexylthiophene)(RRa-P3HT and RR-P3HT) films was comprehensively …

Ultrafast relaxation of the poly (3-hexylthiophene) emission spectrum

N Banerji, S Cowan, E Vauthey… - The Journal of Physical …, 2011 - ACS Publications
The femtosecond-resolved evolution of the emission spectrum of the important conjugated
polymer poly (3-hexylthiophene)(P3HT) is presented. Detailed fluorescence up-conversion …

Exciton dynamics in conjugated polymer systems

W Barford - Frontiers in Physics, 2022 - frontiersin.org
Exciton dynamics in π-conjugated polymers systems encompass multiple time and length
scales. Ultrafast femtosecond processes are intrachain and involve a quantum mechanical …

The hierarchical and perturbative forms of stochastic Schrödinger equations and their applications to carrier dynamics in organic materials

YC Wang, Y Ke, Y Zhao - Wiley Interdisciplinary Reviews …, 2019 - Wiley Online Library
A number of non‐Markovian stochastic Schrödinger equations, ranging from the numerically
exact hierarchical form toward a series of perturbative expressions sequentially presented in …

Exciton formation, relaxation, and decay in PCDTBT

N Banerji, S Cowan, M Leclerc, E Vauthey… - Journal of the …, 2010 - ACS Publications
The nature and time evolution of the primary excitations in the pristine conjugated polymer,
PCDTBT, are investigated by femtosecond-resolved fluorescence up-conversion …

Ultrafast bridge planarization in donor-π-acceptor copolymers drives intramolecular charge transfer

P Roy, A Jha, VB Yasarapudi, T Ram… - Nature …, 2017 - nature.com
Donor-π-acceptor conjugated polymers form the material basis for high power conversion
efficiencies in organic solar cells. Large dipole moment change upon photoexcitation via …

Sub-picosecond delocalization in the excited state of conjugated homopolymers and donor–acceptor copolymers

N Banerji - Journal of Materials Chemistry C, 2013 - pubs.rsc.org
In this feature article, we review and examine evidence that the primary photoexcited
species in conjugated polymers is considerably delocalized. Localization occurs via a series …

Exciton diffusion and charge transfer dynamics in nano phase-separated P3HT/PCBM blend films

H Wang, HY Wang, BR Gao, L Wang, ZY Yang, XB Du… - Nanoscale, 2011 - pubs.rsc.org
Exciton quenching dynamics has been systematically studied in pristine P3HT and nano
phase separated P3HT/PCBM blend films under various excitation intensities by …

Ultrafast spectral hole burning reveals the distinct chromophores in eumelanin and their common photoresponse

FR Kohl, C Grieco, B Kohler - Chemical science, 2020 - pubs.rsc.org
Eumelanin, the brown-black pigment found in organisms from bacteria to humans,
dissipates solar energy and prevents photochemical damage. While the structure of …