Recent research in organic photovoltaic (OPV) is largely focused on developing low cost OPV materials such as graphene. However, graphene sheets (GSs) blended conjugated polymers are known to show inferior characteristics compared fullerene adduct with polymer. Here, we demonstrate that quantum dots regioregular poly(3-hexylthiophene-2,5-diyl) or poly(2-methoxy-5-(2-ethylhexyloxy)-1,4phenylenevinylene) polymer results a significant improvement the GSs polymers. This work has implications for...

We successfully demonstrate inverted structure small-molecule (SM) solar cells with an efficiency of 7.88% using ZnO and PEIE as interfacial layer. Modification a cost-effective thin layer increases the cell result reducing work function cathode suppressing trap-assisted recombination. In addition to high efficiency, SM are relatively stable in air compared conventional cells. As service our authors readers, this journal provides supporting information supplied by authors. Such materials...

We report Barium (Ba) cathode layer for bulk-heterojunction solar cells which enhanced the fill factor (FF) of p-DTS(FBTTh2)2/PC71BM BHJ cell up to 75.1%, one highest value reported an organic cell. The external quantum efficiency exceeds 80%. Analysis recombination mechanisms using current-voltage (J-V) characteristics at various light intensities in reveals that Ba prevents trap assisted Shockley-Read-Hall (SRH) interface and with different thicknesses Ba, shifts towards bimolecular from...

Optically resonant donor polymers can exploit a wider range of the solar spectrum effectively without complicated tandem design in an organic cell. Ultrafast Förster resonance energy transfer (FRET) polymer-polymer system that significantly improves power conversion efficiency bulk heterojunction polymer cells from 6.8% to 8.9% is demonstrated, thus paving way achieving 15% efficient cells.

ABSTRACT This article aims to review the recent progress and future aspects of organic solar cells (OSCs). Different device designs proposed for efficient light harvesting their advancements have been discussed. We discussed various parameters limiting efficiency possible solutions. Special attention has paid understand physics its fundamental facets. Open circuit voltage ( V oc ) is an important parameter in determination efficiency, but picture behind real origin not very much clear;...

We have synthesized and characterized a series of triphenylamine-based hole-transport materials (HTMs), studied their function in solid-state dye sensitized solar cells (ss-DSSCs). By increasing the electron-donating strength functional groups (–H < –Me –SMe –OMe) we systematically shifted oxidation potential ensuing photocurrent generation open-circuit voltage cells. Correlating electronic properties HTM to device operation highlights significant energy offset required between Dye – highest...

The high-concentration stable dispersion of free-standing mono- or few-layer transition metal dichalcogenide (TMD) nanosheets (NSs) remains a significant barrier for their application in solution-processed optoelectronic devices. Here, we report oleylamine (OLA)- and dodecanethiol (DDT)-assisted exfoliation MoS2 NSs nonpolar organic solvent 1,2-dichlorobenzene (DCB), which enables NSs. functionalized were further utilized the fabrication 0D–2D hybrids CuInS2 quantum dots (CIS QDs) strong...

Here, we report copper(<sc>i</sc>)thiocyanate (CuSCN) as an efficient and solution-processable hole transport layer (HTL) in bulk heterojunction solar cells.

Naphthalene diimide–bithiophene P(NDI2OD-T2) is a well-known donor–acceptor polymer, previously explored as n-type material in all-polymer solar cells (all-PSCs) and organic field effect transistor (OFETs) applications. The optical, bulk, electrochemical, semiconducting properties of polymer were tuned via random incorporation perylene diimide (PDI) coacceptor with naphthalene (NDI). Three copolymers containing 2,2′-bithiophene donor unit varying compositions (NDI) (xPDI, x = 15, 30, 50 mol...

Abstract A new low‐band gap dyad DPP‐Ful, which consists of covalently linked dithiafulvalene‐functionalized diketopyrrolopyrrole as donor and fullerene (C 60 ) the acceptor, has been designed synthesized. Organic solar cells were successfully constructed using DPP‐Ful an active layer. This system a record power‐conversion efficiency (PCE) 2.2 %, is highest value when compared to reported single‐component organic cells.

Current-voltage (J-V) characteristics of an organic bulk heterojunction solar cell have been modeled and compared with the measured based on blend poly(3-hexylethiophene) (P3HT) phenyl [6,6] C61 butyric acid methyl ester (PCBM). In undoped double Schottky junction diode, for V&amp;lt;Vbi electric field remains constant is given by (Vbi−V)/d, where Vbi built-in voltage, V applied d sample thickness. We considered effect this charge carrier transport solved drift diffusion equations to model...

In the present study, nanocrystals of cadmium telluride (CdTe) have been directly synthesized in poly(3-hexylthiophene) (P3HT) matrix without use any surfactant. situ synthesis nanoparticles polymer improves polymer-nanoparticles interface, which facilitates efficient electronic interaction between them. Spectral results suggest that CdTe are bound with P3HT via dipole-dipole and form a charge transfer complex. Structural morphological studies reveal works as transport media along/between...

Hole-transport materials 0.44 V different in redox potential give perovskite solar cells with only 0.12 difference <italic>V</italic>_OC and similar PCEs.

A new thermoreversible organogel based on diketopyrrolopyrrole dye (DPP-NCO) is reported for the first time and evolved as a building block fabrication of 1D supramolecular assembly. AFM analysis illustrated that its gel state composed different sized rods. DPP-NCO used an additive in organic solar cells yields high efficiency 7.9% owing to better nanophase separation active layer.

A molecular donor of intermediate dimensions based on dithienogermole (DTG) as the central electron rich unit, coded DTG(FBT₂Th₂)₂, was designed and synthesized for use in bulk heterojunction, solution-processed organic solar cells.

A new molecular Br2-catalyzed polymerization of 2,5-dibromo-3,4-ethylenedioxyselenophene (DBEDOS), 2,5-dibromo-3,4-ethylenedioxythiophene (DBEDOT), and their analogues, providing metal free virtually defect conducting polymers under mild reaction conditions. The resulting poly(3,4-ethylenedioxyselenophene) (PEDOS), poly(3,4-ethylenedioxythiophene) (PEDOT) analogues are electroactive, highly shown optoelectronic properties practically identical to electrochemically prepared insoluble thin...

A new low band gap small molecule with a D-π-A-π-D molecular structure composed of dithiafulvalene (DTF) donor and diketopyrrolopyrrole (DPP) acceptor was synthesized tested for organic solar cells. Using the as an electron donor, PC71BM high power conversion efficiency (PCE) 4.3% achieved.

In this paper, we demonstrated the enhancement in power conversion efficiency (PCE) of solar cells based on poly(3-hexylthiophene-2,5-diyl) (P3HT)/[6,6]-phenyl C71 butyric acid methyl ester (PC71BM) by incorporation functionalized 2D-MoS2 nanosheets (NSs) as an additional charge-transporting material. The PCE ternary arises due to synergic exciton dissociation and improvement mobility both electrons holes through active layer cells. improved hole is attributed formation long-range ordered...

Abstract Organic solar cell research has attracted scientific and commercial interest in the last decade due to a rapid increase power conversion efficiencies (PCEs). Today, PCEs range of 8–10 % have been obtained using conjugated polymers as electron‐donor materials combination with fullerene/other acceptors. However, enable applications, lifetimes organic cells still need be improved significantly. In recent years, potential advantages Se‐containing materials, namely, lower band gaps,...

Nanocrystalline Cu 2 ZnSnS 4 (CZTS) powder was synthesized by a hydrothermal process, using thiourea as sulfur precursor. The qualitatively analyzed X-ray to identify the phase, and size of particles determined transmission electron microscopy (TEM). Raman peak at 337.5 cm −1 confirms formation pure CZTS particles. also solvothermally ethylenediamine solvent. hydrothermally indicated presence kesterite phase particle about 4-5 nm. This environmentally green synthesis route can produce gram...