scholarly journals New Low-Dimensional Hybrid Perovskitoids Based on Lead Bromide with Organic Cations from Charge-Transfer Complexes

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1424
Author(s):  
Igor A. Nikovskiy ◽  
Kseniya L. Isakovskaya ◽  
Yulia V. Nelyubina
Keyword(s):  
Charge Transfer ◽  
Perovskite Solar Cells ◽  
Optoelectronic Device ◽  
Organic Cations ◽  
Charge Transfer Complexes ◽  
Crystalline Materials ◽  
Hybrid Perovskite ◽  
Lead Bromide ◽  
Low Dimensionality ◽  
Low Dimensional

We have obtained a series of low-dimensional hybrid perovskitoids (often referred to as perovskites) based on lead bromide. As organic cations, the derivatives of polyaromatic and conjugated molecules, such as anthracene, pyrene and (E)-stilbene, were chosen to form charge-transfer complexes with various organic acceptors for use as highly tunable components of hybrid perovskite solar cells. X-ray diffraction analysis showed these crystalline materials to be new 1D- and pseudo-layered 0D-perovskitoids with lead bromide octahedra featuring different sharing modes, such as in unusual mini-rods of four face- and edge-shared octahedra. Thanks to the low dimensionality, they can be of use in another type of optoelectronic device, photodetectors.

Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells

ACS Nano ◽  
2015 ◽  
Vol 9 (2) ◽  
pp. 2088-2101 ◽  
Author(s):  
Byung-wook Park ◽  
Sagar M. Jain ◽  
Xiaoliang Zhang ◽  
Anders Hagfeldt ◽  
Gerrit Boschloo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Excitation Energy ◽  
Resonance Raman ◽  
Perovskite Solar Cells ◽  
Transfer Mechanism ◽  
Charge Transfer Mechanism ◽  
Hybrid Perovskite ◽  
Energy Dependent

scholarly journals Elucidating the Trajectory of the Charge Transfer Mechanism and Recombination Process of Hybrid Perovskite Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2698
Author(s):  
Joseph K. Kirui ◽  
Solomon Akin Olaleru ◽  
Lordwell Jhamba ◽  
Daniel Wamwangi ◽  
Kittessa Roro ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Perovskite Solar Cells ◽  
Charge Transfer Process ◽  
Transport Mechanisms ◽  
Contact Materials ◽  
Hybrid Perovskite ◽  
Charge Loss ◽  
Interfacial Recombination ◽  
Material Preparation

Perovskite-based solar cells (PSCs) have attracted attraction in the photovoltaic community since their inception in 2009. To optimize the performance of hybrid perovskite cells, a primary and crucial strategy is to unravel the dominant charge transport mechanisms and interfacial properties of the contact materials. This study focused on the charge transfer process and interfacial recombination within the n–i–p architecture of solar cell devices. The motivation for this paper was to investigate the impacts of recombination mechanisms that exist within the interface in order to quantify their effects on the cell performance and stability. To achieve our objectives, we firstly provided a rationale for the photoluminescence and UV-Vis measurements on perovskite thin film to allow for disentangling of different recombination pathways. Secondly, we used the ideality factor and impedance spectroscopy measurements to investigate the recombination mechanisms in the device. Our findings suggest that charge loss in PSCs is dependent mainly on the configuration of the cells and layer morphology, and hardly on the material preparation of the perovskite itself. This was deduced from individual analyses of the perovskite film and device, which suggest that major recombination most likely occur at the interface.

Synthesis and Characterization of CsPbBr3 for Perovskite Solar Cells

2021 ◽  
Vol 875 ◽  
pp. 3-9 ◽  
Author(s):  
Saqib Ali ◽  
Sofia Javed ◽  
Muhammad Adnan ◽  
Muhammad Usman ◽  
Muhammad Aftab Akram
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Synthesis And Characterization ◽  
Hybrid Perovskite ◽  
Vis Spectroscopy ◽  
Lead Bromide ◽  
Stability Issue ◽  
Hall Effect Measurements ◽  
The Stability

Perovskite solar cells are emerging as highly potent and efficient devices as sustainable energy source. The stability issue of hybrid perovskite methyl ammonium lead bromide can be improved by all inorganic perovskites like cesium lead bromide (CsPbBr3). The present work is about the synthesis and characterization of CsPbBr3 for efficient perovskite solar cells. The synthesis is carried out using hot injection method. The resulting nanocrystals (NCs) are characterized using XRD, SEM, AFM, UV/Vis Spectroscopy, PL spectroscopy and Hall Effect measurements. The NCs are tested for their performance in solar cells.

Magnetic properties of new charge-transfer complexes based on manganese porphyrins

1997 ◽  
Vol 90 (3) ◽  
pp. 407-413
Author(s):  
MARC KELEMEN ◽  
CHRISTOPH WACHTER ◽  
HUBERT WINTER ◽  
ELMAR DORMANN ◽  
RUDOLF GOMPPER ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Manganese Porphyrins

Charge Transfer Complexation Boosts Molecular Conductance Through Fermi Level Pinning

2018 ◽  
Author(s):  
Kun Wang ◽  
Andrea Vezzoli ◽  
Iain Grace ◽  
Maeve McLaughlin ◽  
Richard Nichols ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Single Molecule ◽  
Quantum Interference ◽  
Transmission Function ◽  
Scanning Tunneling ◽  
Charge Transfer Complexes ◽  
Tunneling Microscopy ◽  
Quantum Interference Effect ◽  
Single Molecule Junctions ◽  
Charge Transfer Complexation

We have used scanning tunneling microscopy to create and study single molecule junctions with thioether-terminated oligothiophene molecules. We find that the conductance of these junctions increases upon formation of charge transfer complexes of the molecules with tetracyanoethene, and that the extent of the conductance increase is greater the longer is the oligothiophene, i.e. the lower is the conductance of the uncomplexed molecule in the junction. We use non-equilibrium Green's function transport calculations to explore the reasons for this theoretically, and find that new resonances appear in the transmission function, pinned close to the Fermi energy of the contacts, as a consequence of the charge transfer interaction. This is an example of a room temperature quantum interference effect, which in this case boosts junction conductance in contrast to earlier observations of QI that result in diminished conductance.<br>

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