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Highlights: [•] 3nm siloxane nanoparticles were used as an additive in polymer electrolytes. [•] We observed enhancement of the conductivity with siloxane nanoparticles. [•] Siloxane nanoparticles affect to reduce the crystallization in polymer electrolytes. [•] Glass transition temperature reduction was observed with siloxane nanoparticles. [•] High enhancement in conductivity is originated from the enlarged amorphous area in electrolytes. [ABSTRACT FROM AUTHOR]

We synthesized a planar pDPPTTi-OD polymer based on diketopyrrolopyrrole (DPP) and thieno [2,3- b ]thiophene (TTi) and investigated the electrical properties of the pDPPTTi-OD polymer. pDPPTTi-OD films displayed a low optical bandgap of 1.57 eV, and HOMO and LUMO levels of −5.40 and −3.74 eV, respectively. The 150°C-annealed pDPPTTi-OD films showed a high hole mobility of 0.16 cm 2 V −1 s −1 in organic thin-film transistor (OTFT) devices. The photovoltaic properties of polymer solar cells (PSCs) incorporating the pDPPTTi-OD were also measured. A pDPPTTi-OD:PC 71 BM blend film was spin-coated at 25, 70 and 90 °C. High-temperature processing significantly improved the power conversion efficiency of PSCs by effectively reducing the PC 71 BM domain sizes, which improved the miscibility between pDPPTTi-OD and PC 71 BM. This work demonstrated that the TTi moiety is a useful donor building block for high- performance D–A type polymers in OTFTs and PSCs, and that processing temperatures should be controlled to fully realize the materials' beneficial intrinsic properties. [ABSTRACT FROM AUTHOR]