Explore charge transfer rates in soluble P3HT:PCBM nano-aggregates and their impact on bulk heterojunction film morphology in this 39-minute conference talk. Delve into molecular materials for charge generation, examining cheaper options with tunable absorption. Investigate charge generation challenges in molecular systems and devices, comparing traditional photosynthesis-mimicking approaches with exciton diffusion and dissociation. Learn about conjugated macromolecules and solution-processed polymer-based solar cells, including bulk heterojunction (BHJ) cells and their key challenges. Examine polymer domain evolution, solution nanoscopy techniques, and ultrafast spectroscopy for tracking excitons. Explore solvent-dependent morphologies, excited state dynamics, and advanced spectroscopic methods like Femtosecond Stimulated Raman Spectroscopy (FSRS). Gain insights into modulating conformations and long-lived charge separation in molecular materials, concluding with a non-local perspective on chemistry in this comprehensive presentation from the International Centre for Theoretical Sciences.
Charge Transfer Rates in Soluble P3HT-PCBM Nano-Aggregates
International Centre for Theoretical Sciences via YouTube
Overview
Syllabus
INTERNATIONAL
"Charge Transfer Rates in Soluble P3HT:PCBM Nano-aggregates Predict the Solvent Dependent BHJ Film Morphology"
Photoinduced CT Rates in Soluble P3HT:PCBM Nanoaggregates Predict Solvent-dependent BHJ Morphology
Molecular Materials for Charge Generation! Cheaper materials with tunable absorption?
Charge Generation Problem in Molecular Systems
Charge Generation Problem for Molecular Devices
Traditional Approaches: Mimicking Photosynthesis!
Alternate Idea: Exciton diffusion and dissociation!
Lets join them covalently: Conjugated macromolecules!
Solution processed Polymer-based Solar cells: BHJ cells!
Issues in BHJ framework: Key Challenges!
Solution-to-film transition for Polymers
Evolution of Polymer Domains: The Thermodynamics!
Solution Nanoscopy: Our Idea!
Tracking Excitons: Ultrafast Spectroscopy @ TIFR
Detecting the Ternary Intermediate
Solution of P3HT and high PCBM: Solvent dependence!
Transient Data in P3HT solutions: Localization of Exciton's
Ultrafast Exciton Dissociation in P3HT-PCBM mix: Charges!
Bi-phasic Rise of the Polaronic State
CT Rates in Films: Framework for Solution!
Analogous in solutions?
Exciton-Exciton Annihilation: Scoring for lengthscales
Domain sizes in Films: P3HT nanofibers
Solvent Interactions Dictate Morphologies
Excited State Dynamics of TDPP-BBT
Problems with Transient Absorption
Femtosecond Stimulated Raman Spectroscopy
FSRS detection of Conjugated Polymers
Excited State FSRS Data
Looking ahead: Modulating Conformations!
Alternate Idea in Molecular Materials: Long-lived CS
Chemistry with a "non-local" perspective
Acknowledgements: Our Group and Friends!!
Taught by
International Centre for Theoretical Sciences
