A key consideration for the efficient operation of hybrid solar cells based upon conjugated polymers and inorganic semiconductor nanocrystals is charge transport in the nanocrystal phase. Here we report the results of a study into the charge transport kinetics of polymer/nanocrystal solar cells based on blends poly(3-hexylthiophene) (P3HT) with either CdSe nano-dots or CdSe nano-tetrapods. Tran...

Contact resistances often contribute significantly to the overall device resistance in organic field-effect transistors (OFETs). Understanding charge injection at the metal-organic interface is critical to optimizing OFET device performance. We have performed a series of experiments using bottom-contact poly(3-hexylthiophene) (P3HT) OFETs in the shallow channel limit to examine the injection pr...

Control of polymer morphology and chain orientation is of great importance in organic solar cells and field effect transistors (OFETs). Here we report the use of nanoimprint lithography to fabricate large-area, high-density, and ordered nanostructures in conjugated polymer poly(3-hexylthiophene) or P3HT, and also to simultaneously control 3D chain alignment within these P3HT nanostructures. Out...

Ultraviolet photoelectron spectroscopy (UPS) was used to determine the energy level alignment at organic–organic conductor–semiconductor and semiconductor–semiconductor hetero-interfaces that are relevant for organic optoelectronic devices. Such interfaces were formed by in situ vacuum sublimation of small molecular materials [C60 and pentacene (PEN)] and ex situ spin-coating of poly(3-hexylthi...

The aggregation states and physical properties of polymers in thin films deviate from those found the bulk. Although an effect thickness on carrier mobility for poly(3-hexylthiophene) (P3HT) has been widely studied, there is a lack discussion terms crystallographic distortion. Here, we demonstrate how out-of-plane hole P3HT, which typical semiconducting polymer, changes with decreasing film thi...

Redox doping is widely used to transform polymer semiconductors such as regioregular poly(3-hexylthiophene-2,5-diyl) (P3HT) into conducting polymers. Strong acceptor molecules F6TCNNQ and F4TCNQ have been for sequential of aligned P3HT films produce with enhanced thermoelectric properties along the chain direction. This study uses polarized UV–vis–NIR spectroscopy electron diffraction clarify w...

Low-temperature-processed carbon-based perovskite solar cells (C-PSCs) are promising photovoltaic devices, because of their good stability, low cost, and simple preparation methods, which allow for scalable processing. Herein, C-PSCs with the n−i−p structure prepared, using a SnO2 nanoparticles film as electron-selective contact, MAPbI3 intrinsic absorber layer (MA = methylammonium), carbon hol...

A carbohydrate-based fullerene derivative (AcMal7-C61) is designed, synthesized and applied to a lamellar-forming high-χ block copolymer system, poly(3-hexylthiophene)-block-peracetylated maltoheptaose (P3HT-b-AcMal7), actualize an ordered donor/acceptor (D/A) network. well-defined D/A lamellar structure of the P3HT-b-AcMal7:AcMal7-C61 blend with sub-10 nm domain features achieved upon thermal ...

We describe the effect of blending poly(3-hexylthiophene) (P3HT) with Au nanoparticles (AuNPs) on the performance of organic thin-film transistors. To this end we have used AuNPs of two different sizes coated with chemisorbed SAMs of oligophenyl-thiols possessing increasing lengths. The electrical characteristics of the hybrid materials revealed changes in the field-effect mobility depending pr...