| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Meskers, Stefan C. J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2023Origin and Energy of Intra-Gap States in Sensitive Near-Infrared Organic Photodiodescitations
- 2023Origin and Energy of Intra-Gap States in Sensitive Near-Infrared Organic Photodiodescitations
- 2021Photo-controlled alignment and helical organization in main-chain liquid crystalline alternating polymerscitations
- 2021Consequences of Chirality in Directing the Pathway of Cholesteric Helix Inversion of π-Conjugated Polymers by Lightcitations
- 2021Consequences of Chirality in Directing the Pathway of Cholesteric Helix Inversion of π-Conjugated Polymers by Lightcitations
- 2021Ultralow dark current in near-infrared perovskite photodiodes by reducing charge injection and interfacial charge generationcitations
- 2020Long-lived charge-transfer state from B−N frustrated Lewis pairs enchained in supramolecular copolymerscitations
- 2020Long-lived charge-transfer state from B−N frustrated Lewis pairs enchained in supramolecular copolymerscitations
- 2020Circularly Polarized Photoluminescence from Chiral Perovskite Thin Films at Room Temperaturecitations
- 2020On the origin of dark current in organic photodiodescitations
- 2019Impact of polymorphism on the optoelectronic properties of a low-bandgap semiconducting polymercitations
- 2018The effect of oxygen on the efficiency of planar p-i-n metal halide perovskite solar cells with a PEDOT:PSS hole transport layercitations
- 2018Bis(arylimidazole) iridium picolinate emitters and preferential dipole orientation in filmscitations
- 2017Thiophene rings improve the device performance of conjugated polymers in polymer solar cells with thick active layerscitations
- 2017Ultrafast charge and triplet state formation in Diketopyrrolopyrrole Low Band Gap Polymer/Fullerene blendscitations
- 2014Photoluminescence quenching in films of conjugated polymers by electrochemical dopingcitations
- 2014Effect of the fibrillar microstructure on the efficiency of high molecular weight diketopyrrolopyrrole-based polymer solar cellscitations
- 2014Relation between the electroforming voltage in alkali halide-polymer diodes and the bandgap of the alkali halidecitations
- 2012Electroforming process in metal-oxide-polymer resistive switching memories
- 2012Role of hole injection in electroforming of LiF-polymer memory diodescitations
- 2010Trapping of electrons in metal oxide-polymer memory diodes in the initial stage of electroformingcitations
- 2008Compositional and electric field dependence of the dissociation of charge transfer excitons in alternating polyfluorene copolymer/fullerene blendscitations
- 2006Synthesis and characterization of long perylenediimide polymer fibers : from bulk to the single-molecule levelcitations
- 2006Electronic memory effects in a sexithiophene - poly(ethylene oxide) block copolymer doped with NaCl. combined diode and resistive switching behaviorcitations
- 2006Triplet formation from the charge-separated state in blends of MDMO-PPV with cyano-containing acceptor polymerscitations
- 2005Exciplex dynamics in a conjugated polymer blend of MDMO-PPV and PCNEPV
- 2003Thermally induced transient absorption of light by poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonic acid) (PEDOT:PSS) films: A way to probe charge-carrier thermalization processescitations
- 2002Simulation of electrical conductivity in a pi-conjugated polymeric conductor with infrared lightcitations
- 2000Relaxation of photo-excitations in films of oligo- and poly-(para-phenylene vinylene) derivativescitations
Places of action
| Organizations | Location | People |
|---|
article
Ultrafast charge and triplet state formation in Diketopyrrolopyrrole Low Band Gap Polymer/Fullerene blends
Abstract
Femtosecond transient absorption spectroscopy of thin films of two types of morphologies of diketopyrrolopyrrole low band gap polymer/fullerene-adduct blends is presented and indicates triplet state formation by charge recombination, an important loss channel in organic photovoltaic materials. At low laser fluence (approaching solar intensity) charge formation characterized by a 1350 nm band (in ~250 fs) dominates in the two PDPP-PCBM blends with different nanoscale morphologies and these charges recombine to form a local polymer-based triplet state on the sub-ns timescale (in ~300 and ~900 ps) indicated by an 1100 nm absorption band. The rate of triplet state formation is influenced by the morphology. The slower rate of charge recombination to the triplet state (in ~900 ps) belongs to a morphology that results in a higher power conversion efficiency in the corresponding device. Nanoscale morphology not only influences interfacial area and conduction of holes and electrons but also influences the mechanism of intersystem crossing (ISC). We present a model that correlates morphology to the exchange integral and fast and slow mechanisms for ISC (SOCT-ISC and H-HFI-ISC). For the pristine polymer, a flat and unstructured singlet-singlet absorption spectrum (between 900 and 1400 nm) and a very minor triplet state formation (5%) are observed at low laser fluence.