Modeling Ultrafast Exciton Migration within the Electron Donor Domains of Bulk Heterojunction Organic Photovoltaics
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Physical Chemistry C"
DOI: 10.1021/acs.jpcc.6b11332
Abstract: Recent experimental studies revealed that charge carriers harvested by bulk heterojunction organic photovoltaics can be collected on ultrafast time scales. To investigate ultrafast exciton mobility, we construct simple, nonatomistic models of a common polymeric electron… read more here.
Keywords: electron donor; bulk heterojunction; heterojunction organic; ultrafast exciton ... See more keywords
Unraveling the Ultrafast Exciton Relaxation and Hidden Energy State in CH3NH3PbBr3 Nanoparticles
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Physical Chemistry C"
DOI: 10.1021/acs.jpcc.8b01051
Abstract: Recently organic–inorganic lead-halide perovskite nanoparticles (NPs) have been attractive as low-cost and high-conversion-efficient solar cells and light-emitting diode. The generation of the exciton and dissociation into free carriers are quite important for primary photoelectric conversion… read more here.
Keywords: state; unraveling ultrafast; exciton; ultrafast exciton ... See more keywords
Direct Observation of Ultrafast Exciton Formation in a Monolayer of WSe2.
Sign Up to like & getrecommendations! Published in 2017 at "Nano letters"
DOI: 10.1021/acs.nanolett.6b04422
Abstract: Many of the fundamental optical and electronic properties of atomically thin transition metal dichalcogenides are dominated by strong Coulomb interactions between electrons and holes, forming tightly bound atom-like states called excitons. Here, we directly trace… read more here.
Keywords: formation; direct observation; observation ultrafast; ultrafast exciton ... See more keywords
Resolving ultrafast exciton migration in organic solids at the nanoscale.
Sign Up to like & getrecommendations! Published in 2017 at "Nature materials"
DOI: 10.1038/nmat4975
Abstract: Effectiveness of molecular-based light harvesting relies on transport of excitons to charge-transfer sites. Measuring exciton migration, however, has been challenging because of the mismatch between nanoscale migration lengths and the diffraction limit. Instead of using… read more here.
Keywords: migration organic; resolving ultrafast; ultrafast exciton; migration ... See more keywords
Ultrafast exciton transport at early times in quantum dot solids
Sign Up to like & getrecommendations! Published in 2022 at "Nature Materials"
DOI: 10.1038/s41563-022-01204-6
Abstract: Quantum dot (QD) solids are an emerging platform for developing a range of optoelectronic devices. Thus, understanding exciton dynamics is essential towards developing and optimizing QD devices. Here, using transient absorption microscopy, we reveal the… read more here.
Keywords: ultrafast exciton; microscopy; dot solids; exciton ... See more keywords
Reconstruction of ultrafast exciton dynamics with a phase-retrieval algorithm.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.451759
Abstract: The first step to gain optical control over the ultrafast processes initiated by light in solids is a correct identification of the physical mechanisms at play. Among them, exciton formation has been identified as a… read more here.
Keywords: reconstruction ultrafast; dynamics phase; ultrafast exciton; exciton dynamics ... See more keywords