Advances in organic solar cells: Materials, progress, challenges
The active layer of solar cells contains the donor organic material and the acceptor organic material, used in a layer-by-layer fashion in bilayer heterojunction and are combined together in bulk heterojunction solar cells [30]. Light crosses from the transparent electrode followed by the hole transport layer to incorporate into the active layer.
Solar Cells | Research groups | Imperial College London
Our research proposes to harness this potential through the development of solar cells. This can be achieved for example through the development of novel cells using polymer of small dye molecules to absorb light and convert it into electricity, or by designing systems mimicking photosynthesis, through our multidisciplinary "artificial leaf
Additive-assisted molecular aggregation manipulation towards
Developing thickness-insensitive organic solar cells (OSCs) is of vital importance for meeting the requirements of the mass production of solar panels. Herein, the molecular aggregation behaviour of non-fullerene acceptors was manipulated via two different solvent additives, namely, 1-phenylnaphthalene (PN) and 1-chloronaphthalene (CN), to
Enhancing efficiency and stability of organic solar cells through a
Two simple fully non-fused ring acceptors PTR-2Cl and PTR-4Cl with good planarity were designed and synthesized with four steps. Compared with the control molecule PTR-2Cl-based devices achieve a moderate PCE of 11.05%, the PTR-4Cl-based OSCs provide a high PCE of 14.72% with a high V oc of 0.953 V, which is one of the best results for NFREAs
Efficient and Stable Air‐Processed Organic Solar Cells
The impacts of ambient factors on solar cell fabrication remain unclear. In this work, the effects of ambient factors on cell fabrication are systematically investigated, and it is unveiled that the oxidation and doping of
Progress Toward Stable Organic Solar Cells
Organic solar cells (OSCs) are promising renewable energy sources due to their low cost, lightweight, flexibility, and tunability, with power conversion efficiencies reaching 20%. Tegegne leads a research group focused on understanding efficiency and stability factors in organic solar cells, investigating structure-property relationships
Strain-induced power output enhancement in intrinsically
Organic solar cells (OSCs) are considered promising candidates for powering these wearable electronics, owing to their lightweight, the Ye group used a thermoplastic elastomer, polystyrene-block-poly which is a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231.
Enhanced Performance via End‐Group Alteration of
Donor in organic solar cells (OSCs) is essential for promoting charge transport and enhancing photoelectric conversion efficiency. In this work, five new donors M1–M5 were designed by changing the end group to 3-hexyl-2,4-dithiothiazolidine, dicyano-hexylrhodanine, 1,1-dicyanomethylene-3-indanone, 1,3-indenedione and 1,1-dicyano-5,6-difluoroindanone,
Simultaneous UV and air stability
Organic solar cells (OSCs) are attracting great attention for their lightness and flexibility, roll-to-roll printability, and the application prospect of architectural integration and
Asymmetric liquid crystalline donors with two different end groups
Asymmetric substitution on donors has been shown to be an effective approach to optimize the morphology and photovoltaic performance of all-small-molecule organic solar cells (ASM-OSCs), but this strategy is rarely applied in liquid crystalline small-molecule donors (SMDs). Herein, one of the two rhodanine ( Journal of Materials Chemistry A HOT Papers
Reducing Non‐Radiative Energy Losses in Non‐Fullerene Organic Solar Cells
This review focuses on A−D-A type non-fullerene acceptors, exploring modifications to the end-groups, central core and side-groups to regulate the aggregation behavior of acceptor molecules. The aim is to enhance the photoluminescence quantum yield (PLQY), thereby reducing non-radiative energy losses (ΔE nr) in
Organic solar cells
Organic solar cells convert sunlight into electricity via a complex sequence of events, starting with the absorption of light, followed by creation, separation, transport, and collection of charges.
Efficient and Stable Organic Solar Cells Achieved by Synergistic
Molecular stacking behavior exerts a significant influence on the blend film morphology of organic solar cells (OSCs), further affecting device performance and stability. Modulation of the molecular structure, such as central
Recent Progress in Organic Solar Cells: A Review on Materials
Schematic diagram of OSCs with (a) single active layer structure, (b) bilayer heterojunction structure, and (c) bulk heterojunction structure [].The field of OSCs has advanced enormously in the last few decades, with frequent reports of lab-scale efficiencies of over 10% [11,12,13,14,15,16,17,18] and even 20% [].A large part of this progress can be attributed to
Organic Electronics and Photovoltaics Group
We create and use simulation software to better understand and predict the behavior of organic light-emitting diodes (OLEDs) and organic solar cells (OPVs). We also use modern methods such as physics-inspired neural networks (PINN) and machine learning (ML).
Recent advances in stabilizing the organic solar cells
Abstract Organic solar cells (OSCs) have gained considerable attention due to their attractive power conversion efficiency (over 19%), simple preparation, lightweight and low cost. However, considerable challenges remain in the technical contexts to achieve stable performance for OSCs with extended life cycle. These challenges comprise of two primary
Advanced Functional Materials and Devices (AFMD)
The solar cells developed in our laboratory are not based on silicon, the material of most solar cells currently sold, but on organic semiconductors. Many people will have used organic semiconductors without knowing it: displays made from
Advanced Functional Materials and Devices (AFMD)
In an organic solar cell the process is the other way around: light is efficiently absorbed by organic molecules and converted into electricity that can then be stored in a battery, or go directly into the electricity grid.
(PDF) Organic Solar Cells: An Overview
Some organic molecules commonly applied in evaporated organic solar cells: ZnPc (zinc-phthalocyanine), Me-Ptcdi (N,N''-dimethylperylene-3,4,9,10-dicarboximide), and the
Organic Solar Cells: Recent Progress and
For solar cells made from oligo-thienylenevinylene-based donors and phenyl-C71 butyric acid Me ester (PC71BM), it was found that the voltage loss due to the
Analysis of the charge generation and recombination processes in
Closing the efficiency gap between organic solar cells and their inorganic and perovskite counterparts requires a detailed understanding of the exciton dissociation and charge separation processes, energy loss mechanisms, and influence of disorder effects. In addition, the roles played by excitations delocal Recent Open Access Articles
Efficient organic solar cells with a printed p–i–n stack enabled by
Self-assembled monolayers (SAMs) are key in enhancing the charge extraction interface of organic solar cells (OSCs), recently hitting a 20% power conversion efficiency (PCE). However, it is very challenging to achieve a uniform coating of ultra-thin amphiphilic SAMs on rough ITO substrates, especially for la
High‐Performance Organic Solar Cells Enabled by 3D Globally
A key factor in optimizing organic solar cells (OSCs) is the precise control of blend film morphology to enhance exciton dissociation and charge transport. Solid additives play a vital role in this process, with 3D polyhedral or spherical molecules being ideal candidates due to their delocalized π-orbitals and omnidirectional charge transport.
Solar | Research groups | Imperial College London
Organic solar cells are diode structures, typically comprising both a light absorbing electron donor semiconductor and an electron accepting semiconductor, with a nanoscale blend microstructure or bilayer, creating an interfacial heterojunction.
Introduction to Organic Solar Cells
Structure of Organic Solar Cell. For organic solar cells based on polymer: fullerene bulk heterojunctions, the magnitude of JSC, VOC, and FF depends on parameters such as: light intensity,
Breaking the symmetry of interfacial molecules with push–pull
The symmetry of a molecule governs its electronic structure, dipole moment, electrostatic potential, and molecular interactions. Symmetry breaking is frequently adopted in donor and acceptor materials for efficient charge separation in organic solar cells (OSCs). In this work, we extend this strategy to interfacial
5
INTRODUCTION. There has been rising interest followed by extensive research on organic and polymer solar cells in the last three decades. Organic semiconductors have made great strides since conductivity [1] and electroluminescence [2] in Anthracene were studied in the 1960s by Kallmann and his group.
Organic solar cell
Fig. 1. Schematic of plastic solar cells. PET – polyethylene terephthalate, ITO – indium tin oxide, PEDOT:PSS – poly(3,4-ethylenedioxythiophene), active layer (usually a polymer:fullerene blend), Al – aluminium. An organic solar cell
Organic solar cells
Within the M2N group we investigate organic solar cells from different angles: Synthesis of new semiconductors We develop new semiconducting donor and acceptor materials for organic solar cells. The aim with these new materials is
Human-friendly semitransparent organic solar cells
Semitransparent photovoltaic (ST-PV) devices transmitting enough light and generating electricity have become one of the research frontiers in emerging PV systems including organic, perovskite, quantum dot and dye
Organic Solar Cell Materials toward
Bulk-heterojunction organic solar cells (OSCs) have received considerable attention with significant progress recently and offer a promising outlook for portable energy resources and building-integrated photovoltaics in
6 FAQs about [Organic Solar Cell User Group]
What is an organic solar cell (OSC)?
An organic solar cell (OSC) or plastic solar cell is a type of photovoltaic that uses organic electronics, a branch of electronics that deals with conductive organic polymers or small organic molecules, for light absorption and charge transport to produce electricity from sunlight by the photovoltaic effect.
What is organic solar cell?
Organic solar cell with 15.8% efficiency on a cell surface of 1cm²: current world record. Organic photovoltaics offers unique potential for the generation of environmentally friendly electrical energy. The semiconducting materials essentially consist of hydrocarbons, ranging from small molecules to polymers.
How do organic solar cells work?
In an organic solar cell the process is the other way around: light is efficiently absorbed by organic molecules and converted into electricity that can then be stored in a battery, or go directly into the electricity grid.
What are organic photovoltaic cells?
Most organic photovoltaic cells are polymer solar cells. Fig. 2. Organic Photovoltaic manufactured by the company Solarmer. The molecules used in organic solar cells are solution-processable at high throughput and are cheap, resulting in low production costs to fabricate a large volume.
How to design organic solar cells?
Designing organic solar cells requires optimization of a large number of structural and compositional parameters, such as band gaps and layer thicknesses. Numerical device simulation can provide instrumental insight to identify the optimum stack configuration. This allows reducing the requested time for the development of efficient solar cells.
What is the research topic 'organic photovoltaics'?
In the research topic "Organic Photovoltaics" we focus on the following fields of work: At Fraunhofer ISE, we benefit from this infrastructure for our research and development activities: A 1 cm2 Organic Solar Cell with 15.2% Certified Efficiency. Detailed Characterization and Identification of Optimization Potential