Browsing Department of Physics, Engineering Physics and Astronomy Faculty Publications by Title
Now showing items 1-20 of 32
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Bipolar Electrode Array Embedded in a Polymer Light-Emitting Electrochemical Cell
(American Chemical Society (ACS), 2017-09-20)A linear array of aluminum discs is deposited between the driving electrodes of an extremely large planar polymer light-emitting electrochemical cell (PLEC). The planar PLEC is then operated at a constant bias voltage of ... -
Cesium lead halide perovskite nanostructures: tunable morphology and halide composition
(Wiley, 2017-08-25)Inorganic halide perovskite (CsPbX3) nanostructures have gained considerable interest in recent years owing to their enhanced stability and optoelectronic applications. Recent developments in the synthesis of nanostructures ... -
Deceleration of thermal ring closure in a glass-forming mexylaminotriazine-substituted merocyanine (MC) linked to intramolecular hydrogen bonding
(RSC, 2016-12-21)The design and synthesis of a glass-forming nitrobenzospiropyran (SP) functionalized with a mexylaminotriazine group is reported herein. The title compound was synthesized in 63% overall yield by the carbamylation of a ... -
Decoding the Polymer p–n Junction: Controlled Dedoping and Reverse Bias Electroluminescence
(Wiley, 2020)The polymer light-emitting electrochemical cell (PLEC) is a unique solid-state device possessing attractive attributes for low-cost applications, but also a junction structure that is still poorly understood. In a PLEC, ... -
Dynamic Bipolar Electrode Array for Visualized Screening of Electrode Materials in Light-Emitting Electrochemical Cells
(American Chemical Society (ACS), 2019-01-09)Charge injection at a metal/semiconductor interface is of paramount importance for many chemical and physical processes. The dual injection of electrons and holes, for example, is necessary for electroluminescence in organic ... -
The dynamic bipolar electrode in polymer light-emitting electrochemical cells
(Elsevier BV, 2019-05-01)The redox doping reactions in polymer light-emitting electrochemical cells (PLECs) have been analyzed to gain insight into a new type of bipolar electrode (BPE) formed within the cells. Planar (lateral) PLECs are constructed ... -
Efficiency enhancement of ternary blend organic photovoltaic cells with molecular glasses as guest acceptors
(Elsevier, 2017-11-06)Previously reported glass-forming perylenediimide (PDI-glass) and diketopyrrolopyrrole (DPP-glass) acceptors were used as ternary components to modulate the morphology and electron transport properties of bulk heterojunctions ... -
Fabrication of planar heterojunction CsPbBr2I perovskite solar cells using ZnO as an electron transport layer and improved solar energy conversion efficiency
(RSC, 2018-06-26)Inorganic lead halide perovskite solar cells with mixed halides have achieved reasonable power conversion efficiency with the advantage of an enhanced stability. In this work, we report the fabrication of an all inorganic ... -
High resolution scanning optical imaging of a frozen planar polymer light-emitting electrochemical cell: an experimental and modelling study
(Springer Science and Business Media LLC, 2017-04-01)Light-emitting electrochemical cells (LECs) are organic photonic devices based on a mixed electronic and ionic conductor. The active layer of a polymer-based LEC consists of a luminescent polymer, an ion-solvating/transport ... -
Interfacial Modification of the Electron Collecting Layer of Low-Temperature Solution-Processed Organometallic Halide Photovoltaic Cells Using an Amorphous Perylenediimide
(Elsevier, 2016-10-23)The efficiency of organometallic halide photovoltaic cells can be improved by interfacial modification of the titanium oxide (TiOx) electron collecting layer by a thin layer of an organic material. Enhancements of power ... -
Laser-Induced Bipolar Electrochemistry—On-Demand Formation of Bipolar Electrodes in a Solid Polymer Light-Emitting Electrochemical Cell
(American Chemical Society (ACS), 2018-08-01)Bipolar electrochemistry (BPEC) is a versatile and powerful technique that has found applications in sensing, chemical synthesis, catalysis, fuel cells, and batteries, among others. In BPEC, the reactions of interest occur ... -
Light induced electro-luminescence patterning: interface energetics modification at semiconducting polymer and metal-oxide heterojunction in a photodiode
(American Chemical Society, 2018-10-01)Understanding the injection barriers and defect states at the metal−organic or inorganic−organic interfaces is one of the key challenges in improving the efficiency of hybrid electronic devices. In this paper, polymer and ... -
Near Infrared Electroluminescence from Nd(TTA)3Phen in Solution-Processed Small Molecule Organic Light Emitting Diodes
(Elsevier, 2017-02-01)We report on the near infrared electroluminescence properties of a Nd3+ complex with thenoyltrifluoroacetone and 1,10-phenantroline ligands in solution-processed organic light-emitting diodes. Spincoated blends containing ... -
Photoinduction of spontaneous surface relief gratings on Azo DR1 Glass
(Optics Letters 41, 2958-2961 (2016), 2016-06-23)Surface relief gratings were spontaneously photoinduced from a collimated Nd:YAG laser beam at 532 nm on thin films of a disperse red 1 functionalized glass-forming compound. Pattern formation was studied by measuring the ... -
Polymer light-emitting electrochemical cells—Recent advances and future trends
(Elsevier BV, 2018-01-01)Polymer light-emitting electrochemical cells (PLECs) are electroluminescent devices whose operation involves both ionic and electronic charges. A key reaction in PLEC is the electrochemical doping of the light emitter, a ... -
Reversible Light-Induced Solubility of Disperse Red 1 Dye in a Hydroxypropyl cellulose Matrix
(Springer, 2018-01-29)We present results on reversible light-induced solubility of disperse red 1 (DR1) dye in a hydroxypropyl cellulose (HPC) matrix. The samples were prepared by dissolution of both DR1 and HPC in acetone and left to dry ... -
Searching for Evidence of Optical Rectification: Optically-Induced Nonlinear Photovoltage in a Capacitor Configuration
(Optical Society of America, 2018-12-12)A current challenge in photonics is to design new versatile photodetectors based on optical rectification induced photo-voltage; these ones are more attractive than classical photodetectors because they do not rely on band ... -
Second-Order Nonlinear Optical Properties of Mexylaminotriazine-Functionalized Glass-Forming Azobenzene Derivatives
(Elsevier, 2016-07-27)The second-order nonlinear optical coefficients of thin films of mexylaminotriazine-functionalized azobenzene molecular glass derivatives were measured using second harmonic generation. The thin films were poled using a ... -
Shaping Electroluminescence with a Large, Printed Bipolar Electrode Array: Solid Polymer Electrochemical Cells with Over a Thousand Light‐Emitting p–n Junctions
(Wiley, 2020-03-31)The electroluminescence from a solid polymer light‐emitting electrochemical cell typically originates from a single, narrow p‐n or p‐i‐n junction. The bulk of the active material is non‐emitting and must be doped before ... -
Simple Unbiased Hot-electron Polarization-sensitive Near-Infrared Photo-detector
(American Chemical Society, 2018-03-06)Plasmonic nanostructures can generate energetic “hot” electrons from light in a broad band fashion depending on their shape, size, and arrangement. Such structures have a promising use in photodetectors, allowing high ...