The majority of organic semiconductors have a low relative dielectric constant (εr < 6), which is an important limitation for solar cells (OSCs). A high would reduce the exciton binding energy, charge carrier recombination losses, and thereby enhance overall device performance OSCs. However, development organic/polymeric with higher constants > 6) has attracted very limited attention. Moreover, OSCs based on photovoltaic materials are still in their infancy. Herein, we report oligoethylene...

A series of "double-cable" conjugated polymers were developed for application in efficient single-component polymer solar cells, which high quantum efficiencies could be achieved due to the optimized nanophase separation between donor and acceptor parts. The new double-cable contain electron-donating poly(benzodithiophene) (BDT) as linear backbone hole transport pendant electron-deficient perylene bisimide (PBI) units electron transport, connected via a dodecyl linker. Sulfur fluorine...

Abstract Four hexachlorosubphthalocyanines SubPcCl 6 ‐X bearing different axial substituents (X) have been synthesized for use as novel electron acceptors in solution‐processed bulk‐heterojunction organic solar cells. Subphthalocyanines are aromatic chromophoric molecules with cone‐shaped structure, good solution processability, intense optical absorption the visible spectral region, appropriate mobilities, and tunable energy levels. Solar cells subphthalocyanines acceptor PTB7‐Th donor...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTDiketopyrrolopyrrole-Based Conjugated Polymers with Perylene Bisimide Side Chains for Single-Component Organic Solar CellsWenbin Lai†±, Cheng Li†, Jianqi Zhang‡, Fan Yang†±, Fallon J. M. Colberts§, Bing Guo⊥, Qiang Mike Wang§, Mengmeng Li§, Andong Zhang†±, René A. Janssen§, Maojie Zhang⊥, and Weiwei Li*†View Author Information† Beijing National Laboratory Molecular Sciences, Key of Solids, Institute Chemistry, Chinese Academy 100190, People's...

The influence of the chemical structure conjugated polymers on nanophase separation and device performance in fullerene-based solar cells has been widely studied, while this is less investigated non-fullerene cells. In work, we design three with different length side chains, find that chains little quantum efficiencies As a comparison, significant effect This indicates morphology blended thin films rather independent donor mechanism for evolution system completely from fullerene system. Our...

Polymer solar cells based on PDPP5T and PCBM as donor acceptor materials, respectively, were processed from aqueous nanoparticle dispersions. Careful monitoring optimization of the concentration free surface-bound surfactants in dispersion, by measuring conductivity ζ-potential, is essential to avoid aggregation nanoparticles at low dewetting film high concentration. The surfactant crucial for creating reproducible processing conditions that aid further developing cells. In addition, effects...

Abstract Developing novel materials that tolerate thickness variations of the active layer is critical to further enhance efficiency polymer solar cells and enable large‐scale manufacturing. Presently, only a few polymers afford high efficiencies at exceeding 200 nm molecular design guidelines for developing successful are lacking. It thus highly desirable identify structural factors determine performance semiconducting conjugated in thick‐film cells. Here, it demonstrated thiophene rings,...

Abstract Compared to conjugated polymers, small‐molecule organic semiconductors present negligible batch‐to‐batch variations, but presently provide comparatively low power conversion efficiencies (PCEs) in small‐molecular solar cells (SM‐OSCs), mainly due suboptimal nanomorphology. Achieving precise control of the nanomorphology remains challenging. Here, two new donors H13 and H14 , created by fluorine chlorine substitution original donor molecule H11 are presented that exhibit a similar or...

Abstract To advance polymer solar cells (PSCs) toward real‐world applications, it is crucial to develop materials that are compatible with a low‐cost large‐scale manufacturing technology. In this context, practically useful should fulfill several critical requirements: the capability provide high power conversion efficiencies (PCEs) via fabrication using environmentally friendly solvents under mild thermal conditions, resulting in an active layer thick enough minimize defects large‐area...

Abstract A new method is presented to fabricate bilayer organic solar cells via sequential deposition of bulk‐heterojunction layers obtained using spontaneous spreading polymer–fullerene blends on a water surface. Using two small bandgap diketopyrrolopyrrole blend, improvement in power conversion efficiency (PCE) from 4.9% 5.1% compared spin‐coated devices similar thickness. Next, bilayer–ternary are fabricated by first spin coating wide thiophene followed depositing layer transfer These...

Abstract Four hexachlorosubphthalocyanines SubPcCl 6 ‐X bearing different axial substituents (X) have been synthesized for use as novel electron acceptors in solution‐processed bulk‐heterojunction organic solar cells. Subphthalocyanines are aromatic chromophoric molecules with cone‐shaped structure, good solution processability, intense optical absorption the visible spectral region, appropriate mobilities, and tunable energy levels. Solar cells subphthalocyanines acceptor PTB7‐Th donor...

Abstract Diketopyrrolopyrrole (DPP)‐conjugated polymers are a versatile class of semiconductors for application in organic solar cells because their tunable optoelectronic properties. A record power conversion efficiency (PCE) 9.4% was recently achieved DPP polymers, but further improvements required to reach true limits. Using five with different chemical structures and molecular weights, the device performance polymer:fullerene is systematically optimized by considering polarity,...

A new class of subnaphthalocyanines bearing various peripheral and axial substituents have been synthesized for use as electron acceptors in solution-processed bulk-heterojunction polymer solar cells. The resulting cells exhibit modest photovoltaic performance with contributions from both the donor subnaphthalocyanine acceptor to photocurrent.

Abstract Integration of photovoltaics (PV) into the built environment (BIPV) and infrastructure (IIPV) is required to increase installed capacity PV worldwide, while still leaving sufficient area for other land uses. Although BIPV applications have proven play a significant role in energy transition, road integrated IIPV concepts are less developed bring challenges mechanical electrical stability safety that need be addressed. In this work, feasibility integrating thin‐film CIGS (Copper...

Developing effective methods to make efficient bulk-heterojunction polymer solar cells at roll-to-roll relevant active layer thickness is of significant importance. We investigate the effect fullerene content in polymer:fullerene blends on fill factor (FF) and performance thick-film for four different donor polymers PTB7-Th, PDPP-TPT, BDT-FBT-2T, poly[5,5′-bis(2-butyloctyl)-(2,2′-bithiophene)-4,4′-dicarboxylate-alt-5,5′-2,2′-bithiophene] (PDCBT). At a few hundreds nanometers thickness,...

Alternating donor–acceptor polymers of diketopyrrolopyrrole and quaterthiophene with electron-withdrawing ester groups are studied to reduce the photon energy loss in solar cells.

The combination of narrow-bandgap diketopyrrolopyrrole (DPP) polymers and nonfullerene acceptors (NFAs) seems well-matched for solar cells that exclusively absorb in the near infrared but they rarely provide high efficiency. One reason is processing active layer complicated by fact DPP-based are generally only sufficiently soluble chloroform (CF), while NFAs preferably processed from halogenated aromatic solvents. By using a ternary solvent system consisting CF, 1,8-diiodooctane (DIO),...

All‐polymer solar cells (APSCs), composed of semiconducting donor and acceptor polymers, have attracted considerable attention due to their unique advantages compared polymer‐fullerene‐based devices in terms enhanced light absorption morphological stability. To improve the performance APSCs, morphology active layer must be optimized. By employing a random copolymerization strategy control regularity backbone polymers (PTAZ‐TPD x ) (PNDI‐T can systematically optimized by tuning polymer...

Molecular weight and intrinsic solubility affect the photovoltaic performance for a diketopyrrolopyrrole polymer with mixed alkyl siloxane side chains.

Recent research has shown that perovskite solar cells with a mixed dual A-cation have much better structural stability without loss of efficiency than single cation devices. Mixed perovskites create lot questions about the salts being used for formation best-quality layer. Here, we investigated three sources bromide in absorption layer, using lead (PbBr2), formamidinium (FABr), and cesium (CsBr). The experimental results performance FABr CsBr comparison to regularly PbBr2. This effect been...

Polythiophene derivatives with ester side chains enable high open-circuit voltages in polymer–fullerene solar cells. The affect the solubility, thermal properties, tendency to aggregate, and photovoltaic performance by modulating morphology of blends.

The demand for renewable energy is increasing as efforts to decarbonize sources continue. Photovoltaic (PV) generation systems are the main contributor growth of energy, but limited land availability in countries such Belgium and Netherlands poses a challenge their deployment. Integrated PV (IPV) can be promising solution, requires special consideration regarding electrical fire safety, efficiency, durability, cost, environmental impact design process. This study seeks assist designers IPV...