Over 19.2% efficiency of layer-by-layer organic photovoltaics enabled by a highly crystalline material as an energy donor …
A series of layer-by-layer (LbL) ternary organic photovoltaics (OPVs) were prepared with polymer PM1 as a donor, small molecule L8-BO as an acceptor, and a highly crystalline small molecule D18A as the third component. The power conversion efficiency (PCE) of LbL OPVs can be increased from 18.31% to 19.25% b
Dilute Donor Organic Solar Cells Based on Non-fullerene …
The most efficient OPV devices have a combination of electron donor and acceptor materials that constitute the light absorbing layer in a bulk heterojunction (BHJ) …
Donor–acceptor mutually diluted heterojunctions for layer-by …
We fabricate a pseudo-bilayer heterojunction solar cell based on NFA-diluted donor (that is, donor + 1% NFA) and donor-diluted NFA (that is, NFA + 1% …
Amplifying High‐Performance Organic Solar Cells Through …
Developing non-halogenated solvent-processed organic solar cells (OSCs) demands precise control over the bulk-heterojunction (BHJ) morphology of the photoactive layer. However, the limited solubility of halogen-free solvents to photoactive materials …
Exploration of promising optical and electronic properties of (non …
Five new non-fullerene donor molecules were designed keeping in view the excellent donor properties of 3-bis (4- (2-ethylhexyl)-thiophen-2-yl)-5,7-bis …
Non-Equivalent Donor-Acceptor Type Polymers as Dopant-Free …
Electron donor (D)-electron acceptor (A) type conjugated polymers present bright prospects as dopant-free hole-transporting materials (HTMs) for perovskite solar cells (PVSCs). Most of the reported D-A polymeric HTMs contain equivalent amounts of D and A units, while the appropriate excess proportion of D units could optimize the aggregation state of polymer …
A new narrow bandgap polymer as donor material for high performance non-fullerene polymer solar …
1. Introduction Polymer solar cells (PSCs) are considered as a promising solar energy conversion technology with the advantages of being solution processed, lightweight, low cost, mechanical flexibility and the capability to be fabricated into semitransparent devices ...
Donor–Acceptor–Donor Type Cyclopenta[2,1-b;3,4-b′]dithiophene ...
Three new donor–acceptor–donor type (D–A–D) hole-transporting materials (HTMs), YC-1–YC-3, based on the 4-dicyanomethylene-4H-cyclopenta[2,1-b;3,4-b′]dithiophene (DiCN-CPDT) core structure endowed with two arylamino-based units as peripheral groups were designed, synthesized, and applied in perovskite solar cells …
Spirobifluorene with an asymmetric fluorenylcarbazolamine …
The efficiency of perovskite solar cells utilizing spiro-OMeTAD as the hole transport material has been persistently enhanced, attaining the current 25.7%. However, these high-efficiency cells are unable to withstand the harsh heat at 85 °C. In this report, we present a spirobifluorene based hole transport m Spotlight on Women in Energy
Low‐Bandgap Donor/Acceptor Polymer Blend Solar Cells with …
Low-bandgap donor/acceptor polymer blend solar cells are fabricated. The device performance is optimized at a donor:acceptor blending ratio of 70:30 wt% to result in a short-circuit current density of 8.85 mA cm −2, a fill factor of 0.55, and an open circuit voltage of 0.84 V.The high PCE, which exceeds 4%, demonstrates the potential of …
Polymer-nanocarbon composites: a promising strategy for enhanced performance of organic solar cells | Emergent Materials
The exigency for sustainable and clean energy resources has led to profound research in development of various generations of solar cells, aiming to control the over-exploitation of fossil fuels and subsequently limit environmental degradation. Among the fast-emerging third-generation solar cells, polymer solar cell technology has gained …
A new dialkylthio-substituted naphtho[2,3-c]thiophene-4,9-dione based polymer donor for high-performance polymer solar cells
Rational molecular design towards high-performance photovoltaic materials with superior large-area capability is critical but still a challenge for the research field of polymer solar cells (PSCs). In this work, we design and synthesize a new dialkylthio-substituted conjugated polymer donor (namely PBN-S) to
Theoretical Understanding and Role of Guest π-Bridges in …
In recent years, significant attention has been devoted to developing small-molecule-based donor materials to prepare efficient and highly stable solar cell devices. For this purpose, development of several kinds of donor materials has received much attention from the scientific community. Herein, a new strategy to design photovoltaic …
Overview: Photovoltaic Solar Cells, Science, Materials, Artificial ...
3.1 Inorganic Semiconductors, Thin Films. The commercially availabe first and second generation PV cells using semiconductor materials are mostly based on silicon (monocrystalline, polycrystalline, amorphous, thin films) modules as well as cadmium telluride (CdTe), copper indium gallium selenide (CIGS) and gallium arsenide (GaAs) …
Recent advances in high performance donor-acceptor polymers …
Organic photovoltaic cells made with semiconducting polymers remain one of the most promising technologies for low-cost solar energy due to their compatibility …
Molecules | Free Full-Text | Recent Progress in Organic Solar Cells: A Review on Materials from Acceptor to Donor …
In the last few decades, organic solar cells (OSCs) have drawn broad interest owing to their advantages such as being low cost, flexible, semitransparent, non-toxic, and ideal for roll-to-roll large-scale processing. Significant advances have been made in the field of OSCs containing high-performance active layer materials, electrodes, and …
High-performance conjugated polymer donor materials for polymer solar ...
High-performance conjugated polymer donor materials for polymer solar cells with narrow-bandgap nonfullerene acceptors @article{Cui2019HighperformanceCP, title={High-performance conjugated polymer donor materials for polymer solar cells with narrow-bandgap nonfullerene acceptors}, author={Chaohua Cui and Yongfang Li}, …
Evaluation of bis-dicyanovinyl short-chain conjugated systems as donor ...
Solar Energy Materials and Solar Cells. Volume 95, Issue 2, February 2011, Pages 462-468. ... now reached high power conversion efficiencies [11], [12], further progress in this field requires the synthesis of new donor materials specifically designed for photovoltaic conversion.
Molecular design of D–π–A–π–D small molecule donor materials …
Context Developing novel materials present a great challenge to improve the photovoltaic performance of organic solar cells (OSCs). In this paper, we designed a series of the donor–π bridge–acceptor–π bridge–donor (D–π–A–π–D) structure molecules. These molecules consist of diketopyrrolopyrrole (DPP) moiety as core, …
High-performance conjugated polymer donor materials for polymer solar cells with narrow-bandgap nonfullerene acceptors
In the past few years, the emergence of nonfullerene (n-type organic semiconductor (n-OS)) acceptors combining with the rational design of conjugated polymer donor materials has dominated the rapid development of highly efficient polymer solar cells (PSCs). Relative to the traditional fullerene derivative ac
A new polymer donor for efficient polymer solar cells: simultaneously realizing high short-circuit …
A polymer donor material with appropriate energy levels and high light-harvesting capability is critical for highly efficient polymer solar cells (PSCs). Especially, it is a challenge to develop polymer donors which can simultaneously achieve both high short-circuit current density (Jsc) and transmittance fo
Donor-Acceptor molecule with TICT character: a new design
Organic photothermal materials, particular the donor-acceptor (D-A) type ones, have attracted increased attention because they could efficiently transform solar energy to heat in an environmentally friendly manner. So far, there are many strategies to improve the fluorescence of D-A type molecules, while how to quench the fluorescence via non …
All-small-molecule organic solar cells based on cyclometalated …
Cyclometalated tris-Ir(III) complexes with six-coordinated octahedral configuration are beneficial to reduce aggregation for improved film morphology in organic solar cells (OSCs). Herein, two homoleptic tris-Ir complexes of eBz3Ir and eTBz3Ir showing majority absorption from UV to light-blue range are designed as electron donor …
Accelerating the generation and discovery of high-performance …
Organic solar cells are a potential solution for sustainable energy. However, it is time-consuming and costly to discover high-efficiency materials for organic …
A new narrow bandgap polymer as donor material for high performance …
Polymer solar cells (PSCs) based on narrow bandgap (NBG) photovoltaic materials have attracted significant attention due to their unique applications in semitransparent devices and organic tandem solar cells. In this work, we design and synthesize a new NBG polymer PBTT based on 2-(2-ethylhexyl)-thienyl substituted …
