Francisco Tenopala-Carmona

Francisco Tenopala-Carmona
University of Cologne | UOC · Department of Chemistry

Doctor of Philosophy

About

14
Publications
1,876
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84
Citations
Additional affiliations
August 2014 - August 2018
University of St Andrews
Position
  • PhD Student
August 2012 - July 2014
Universidad Nacional Autónoma de México
Position
  • Master's Student

Publications

Publications (14)
Preprint
The use of thermally activated delayed fluorescence emitters and emitters that show preferential horizontal orientation of their transition dipole are two emerging strategies to enhance the efficiency of organic light-emitting diodes. We present the first example of a liquid crystalline multi-resonance thermally activated delayed fluorescent emitte...
Article
Exciplexes of individual electron donor and acceptor molecules are a promising approach to utilizing otherwise non-emissive triplet states in optoelectronic applications. In this work, we synthesize a series of bis(terpyridine)...
Article
Full-text available
In organic light‐emitting diodes (OLEDs), horizontal orientation of the emissive transition dipole moment (TDM) can improve light outcoupling efficiency by up to 50% relative to random orientation. Therefore, there have been extensive efforts to identify drivers of horizontal orientation. The aspect ratio of the emitter molecule and the glass‐trans...
Article
Strong light–matter coupling leads to the formation of mixed exciton–polariton states, allowing for a rigorous manipulation of the absorption and emission of excitonic materials. Here, we demonstrate the realization of this promising concept in organic photodetectors. By hybridizing the E11 exciton of semiconducting (6,5) single-walled carbon nanot...
Article
Full-text available
The accurate characterization of thin‐film light emitting diodes (LEDs)—including organic light emitting diodes (OLEDs), perovskite LEDs, and quantum dot LEDs—is crucial to the understanding of the factors that influence their efficiency and thus to the fabrication of LEDs with improved performance and stability. In addition, detailed information a...
Article
We report two donor-acceptor (D-A) materials based on a cyanoanthracene acceptor paired with diphenylamine (DPAAnCN) and carbazole (CzAnCN) donor moieties. These compounds show hybrid locally excited (LE) charge-transfer (CT) excited states (HLCT), which we demonstrated through a combined photophysical and computational study. Vacuum-deposited orga...
Article
Full-text available
Two bipolar host materials 3‐CBPy and 4‐mCBPy are reported. These hosts are structural analogs of the common host materials CBP and mCBP wherein the phenyl rings have been replaced with pyridines. The two materials possess deep highest occupied molecular orbital (HOMO) and shallow lowest unoccupied molecular orbital (LUMO) levels along with suffici...
Article
Conjugated polymers are an important class of organic semiconductors that can be deposited from solution to make optoelectronic devices. Among them, poly(9,9′-dioctylfluorene) (PFO) has distinctive optical properties arising from its ability to adopt an ordered planar conformation (β phase) from a disordered glassy phase (α phase). The β phase has...
Article
Full-text available
Conjugated polymers (CPs) are an important class of organic semiconductors that combine novel optoelectronic properties with simple processing from organic solvents. It is important to study CP conformation in solution to understand the physics of these materials and because it affects the properties of solution-processed films. Single-molecule tec...
Conference Paper
We developed a tactile vision sensor, by converting light intensity from narrowband reflection spectroscopy into different stimuli such as sound. This creates the perception of colours though alternative senses. The device extends work done to develop a wearable sensor of erythema and shows the outcome from the collaboration between scientists and...
Article
We present an experimental analysis of the angular distribution of the emission of a random laser (RL) operating in the diffusive regime (∼1% volume fraction of scatterers). The RL ensemble was made of silica particles suspended in a 1:1 methanol:water matrix with Rhodamine 6G dye as the active medium. We found that, for specific pumping-energy-dep...
Conference Paper
Full-text available
We present experimental results of a random laser in a cylindrical cell. With this configuration we manage to exhibit that the laser's lasing modes, the lasing threshold and the peak wavelength exhibit angular dependence.

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