A5059476429- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Head and Neck Surgical Oncology
- Nanomaterials and Printing Technologies
- Head and Neck Cancer Studies
- Advanced Sensor and Energy Harvesting Materials
- Perovskite Materials and Applications
- Cancer Diagnosis and Treatment
University College London
2017-2022
London Centre for Nanotechnology
2017-2022
St Savas Hospital
2016
The presence of energetically low-lying triplet states is a hallmark organic semiconductors. Even though they present wealth interesting photophysical properties, these optically dark significantly limit optoelectronic device performance. Recent advances in emissive charge-transfer molecules have pioneered routes to reduce the energy gap between triplets and "bright" singlets, allowing thermal population exchange them eliminating significant loss channel devices. In conjugated polymers, this...
Abstract The energy gap law ( E G -law) and aggregation quenching are the main limitations to overcome in design of near-infrared (NIR) organic emitters. Here, we achieve unprecedented results by synergistically addressing both these limitations. First, propose porphyrin oligomers with increasing length attenuate effects -law suppressing non-radiative rate growth, increase radiative via enhancement oscillator strength. Second, side chains suppress quenching. We find that logarithmic...
We present the synthesis and characterization of a series encapsulated diketopyrrolopyrrole red-emitting conjugated polymers. The novel materials display extremely high fluorescence quantum yields in both solution (>70%) thin film (>20%). Both absorption emission spectra show clearer, more defined features compared to their naked counterparts demonstrating suppression inter intramolecular aggregation. find that encapsulation results decreased energetic disorder dramatic increase backbone...
Abstract A novel tattooable, ultrathin, green organic light‐emitting diode (OLED) fabricated on top of commercial temporary tattoo paper, is demonstrated. The transfer mechanism relies dissolution the sacrificial layer typically incorporated in paper‐tattoos. ready‐to‐use device can be stored substrate and released target surface at a later time, simply by slight wetting paper with water. This approach provides quick easy method transferring OLEDs virtually any surface. particularly...
The luminescence and electroluminescence of an ethyne-linked zinc(ii) porphyrin pentamer have been investigated, by testing blends in two different conjugated polymer matrices, at a range concentrations. best results were obtained for with the PIDT-2TPD, loading 1 wt%. This host matrix was selected because excellent overlap between its emission spectrum low-energy region absorption oligomer leads to efficient energy transfer. Thin films this blend exhibit intense fluorescence near-infrared...
The luminescence and electroluminescence of an ethyne-linked zinc(II) porphyrin pentamer have been investigated, by testing blends in two different conjugated polymer matrices, at a range concentrations. best results were obtained for with the PIDT-2TPD, loading 1 wt%. This host matrix was selected because excellent overlap between its emission spectrum absorption oligomer leads to efficient energy transfer. Thin films this blend exhibit intense fluorescence near-infrared (NIR), peak...