High-performance polymer donors when paired with nonfullerene acceptors are mainly limited to flanking halogenated benzodithiophene (BDT)-based ?-conjugated copolymers, which however involve complex synthetic procedures. Herein, a series of halogen-free that link BDT moiety two highly electron-deficient benzodithiophene-dione (BDD) and diketopyrrolopyrrole (DPP) units various molar ratios is de...

Most of the recent organic solar cells (OSCs) with top-of-the-line efficiencies are processed from solvents a high vapor pressure such as CF in nitrogen-filled glovebox, which is not feasible for large-area manufacturing. Herein, we cast active layers both aromatic hydrocarbon and halogenated without any solvent additive or post-treatment, well interlayers water methanol air (35% relative humid...

   A modified morphology was introduced for poly(3-hexylthiophene):phenyl-C71-butyric acid methyl ester (P3HT:PC71BM) bulk heterojunction (BHJ) solar cells by thermal and solvent annealing treatments in the presence of hydrophilic-hydrophobic block copolymers. Power conversion efficiency (PCE) plummet was prohibited during both thermal and solvent treatments for all BHJ devices modified wit...

Three new A-π-D-π-A structural porphyrin-based donors, C19-H2P, C19-PdP, and C19-PtP, are designed synthesized, with porphyrin (D) moieties equipped no metal, palladium (Pd), platinum (Pt) as the core, respectively, end-capped electron-deficient 3-ethylrhodanine (A) via a π-bridge of phenylene ethynylene linker. C19-PdP C19-PtP exhibit low-lying highest occupied molecular orbital levels than C1...

Conjugated polymers based on the donor of an asymmetric 5H-dithieno[3,2-b:2′,3′-d]pyran (DTPa) and the acceptors of benzo[d][1,2,3]triazole (BTA) or di-fluorinated benzo[d][1,2,3] triazole (ffBTA) with thiophene as π-bridge were designed and synthesized. Two asymmetric-buildingblock-containing polymers (ABC-polymers) possess a strong and broad absorption in the range of 300–750 nm and medium op...

Three 3,4-dithienyl-substituted polythiophene derivatives have been synthesized and characterized. Polymer P2 exhibits the widest light absorption spectrum of the polymers in its polymer chain, which has an alternative donor-acceptor structure. Copolymers blended with 6,6-phenyl-C71-butyric acid methyl ester(PC71BM) as active layers are used to fabricate polymer solar cells (PSCs), and a variet...

0.1016/j.nanoen.2 ublished by Elsevi thors. : [email protected] (L. Dai). Abstract In this study, we demonstrate that few-layered graphene quantum dots (F-GQDs) can be used as hole-extraction layer (HEL) for high efficiency polymer solar cells (PSCs). As a new class of HEL material, graphene oxide (GO) is not suitable for polymer solar cells (PSCs) based on highly efficient donor polymers due to...

An innovative bilayer cathode interlayer (CIL) with a nanostructure consisting of in situ thermal reduced graphene oxide (ITR-GO) and poly[(9,9-bis(3'-(N,N-dimethylamion)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctyl) fluorene] (PFN) has been fabricated for inverted organic solar cells (OSCs). An approach to prepare a CIL of high electronic quality by using ITR-GO as a template to modulate the morp...