Scientists / Open questions

Stephen R. Forrest

Organic electronics; optoelectronic devices

12 questions

Microscopic determination of the charge-transfer-state Coulomb binding energy and dielectric screening at organic donor-acceptor heterojunctions and their influence on the open-circuit voltage of organic solar cells
Mechanism and model validity of metal-cap confined annealing for bulk phase segregation in vacuum-deposited CuPc:PTCBI photovoltaic films
Microscopic origin of dispersive triplet-exciton transport in amorphous Alq3 and its dependence on triplet density
Operational color stability and lifetime of single-dopant monomer-aggregate white electrophosphorescent OLEDs
Completing singlet and triplet exciton management in fluorescent/phosphorescent hybrid white organic light-emitting devices: stable high-utilization blue emitters, resonant energetic alignment, and predictive modeling of exciton losses
Open problems in room-temperature organic-microcavity polariton condensation: loss-limited ground-state populations, quantitative feeding mechanisms, finite-lifetime thresholds, polariton-versus-photon lasing criteria, and the path to electrical driving
Predictive switching physics and array-level validation of the hybrid PEDOT:PSS-fuse / thin-film-silicon-diode write-once read-many-times (WORM) memory
Realization of a directly electrically pumped (current-injection) organic semiconductor laser diode, with quantified management of injection losses
Microscopic origin of the mobility enhancement at OTS-modified gate dielectrics in pentacene thin-film transistors, and the decoupling of grain size from field-effect mobility
Unresolved issues behind efficient photon harvesting in ultrathin organic double-heterostructure photovoltaic diodes: exciton diffusion length, optical modeling, exciton-blocking-layer energetics, light trapping, and stability
Complete triplet harvesting in phosphor-sensitized fluorescent organic light-emitting devices: suppressing Dexter-transfer and direct-formation losses to reach the full four-fold efficiency limit
Validating and optimizing long-range plasmonic absorption enhancement by metal nanoclusters in organic photovoltaic cells

Back to open problems

Microscopic determination of the charge-transfer-state Coulomb binding energy and dielectric screening at organic donor-acceptor heterojunctions and their influence on the open-circuit voltage of organic solar cells

Mechanism and model validity of metal-cap confined annealing for bulk phase segregation in vacuum-deposited CuPc:PTCBI photovoltaic films

Microscopic origin of dispersive triplet-exciton transport in amorphous Alq3 and its dependence on triplet density

Operational color stability and lifetime of single-dopant monomer-aggregate white electrophosphorescent OLEDs

Completing singlet and triplet exciton management in fluorescent/phosphorescent hybrid white organic light-emitting devices: stable high-utilization blue emitters, resonant energetic alignment, and predictive modeling of exciton losses

Open problems in room-temperature organic-microcavity polariton condensation: loss-limited ground-state populations, quantitative feeding mechanisms, finite-lifetime thresholds, polariton-versus-photon lasing criteria, and the path to electrical driving

Predictive switching physics and array-level validation of the hybrid PEDOT:PSS-fuse / thin-film-silicon-diode write-once read-many-times (WORM) memory

Realization of a directly electrically pumped (current-injection) organic semiconductor laser diode, with quantified management of injection losses

Microscopic origin of the mobility enhancement at OTS-modified gate dielectrics in pentacene thin-film transistors, and the decoupling of grain size from field-effect mobility

Unresolved issues behind efficient photon harvesting in ultrathin organic double-heterostructure photovoltaic diodes: exciton diffusion length, optical modeling, exciton-blocking-layer energetics, light trapping, and stability

Complete triplet harvesting in phosphor-sensitized fluorescent organic light-emitting devices: suppressing Dexter-transfer and direct-formation losses to reach the full four-fold efficiency limit

Validating and optimizing long-range plasmonic absorption enhancement by metal nanoclusters in organic photovoltaic cells