In this study, we demonstrate high-performance optical wavelength-selective organic thin-film transistors (TFTs) that incorporate heterogeneous semiconductor materials, poly(3-hexylthiophene) (P3HT) and 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene). The electrical characteristics of the fabricated were analyzed in dark to determine how P3HT:TIPS-pentacene ratio affected performa...

Determining the relative energies of transport states in organic semiconductors is critical to understanding properties electronic devices and designing device stacks. Futhermore, defect are also highly important can greatly impact material performance. Recently, energy-resolved electrochemical impedance spectroscopy (ER-EIS) developed probe both ionization energy (IE) electron affinity (EA) as...

Carbon-based perovskite solar cells (C-PSCs) benefit from the chemical inertness and hydrophobicity of carbon electrodes, resulting in high stability. Generally, C-PSCs have lower photovoltaic performance than metal electrode-based ones. This is primarily attributed to low hole extraction efficiency at interface between electrode. We synthesized a nanotube/poly(3-hexylthiophene) (CNT/P3HT, deno...

Conductive polymer poly-3-hexylthiophene (P3HT) needles were self-assembled using a second component (indandione derivatives) as a linking agent to enhance their long range alignment. The morphologies of the hybrid organic/organic materials were characterized by transmission electron microscopy (TEM). Both linear and branched structures could be produced, with the degree of branching depending ...

Amethodwhichenables the investigationof theburied interfaceswithoutaltering the properties of the polymer films is used to study vertical phase separation of spin-coated poly(3-hexylthiophene) (P3HT):fullerene derivative blends. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) analysis reveals the P3HT enrichment at the free (air) surfaces and abundanceof fullerene deriv...

We report on the photovoltaic performance of bulk heterojunction solar cells using novel nanoparticles of 6-palmitate ascorbic acid surface modified TiO(2) as an electron acceptor embedded into the donor poly(3-hexyl)thiophene (P3HT) matrix. Devices were fabricated by using P3HT with varying amounts of red TiO(2) nanoparticles (1:1, 1:2, 1:3 w-w ratio). The devices were characterized by measuri...

A density functional theory approach is employed to investigate poly-3-hexylthiophene (P3HT) interfaced with both a semiconducting and metallic carbon nanotube (CNT). For the semiconducting CNT, a type-II heterojunction can form, making such an interface desirable as a photovoltaic heterojunction. In contrast, with the metallic CNT, substantial charge redistribution occurs and the interaction i...

In this Section, we report the refractive indexes and the extinction coefficients obtained from VASE measurements, and used in all TMM calculations. As specified in the text, optical constants were determined for ITO, PEDOT:PSS, P3HT, and PCBM. ITO was deposited on glass, whereas the other materials on a Si substrate, in order to enhance the spectral response and remove backside reflections. Fi...

The fabrication of flexible organic photovoltaics (OPVs) which utilize transparent and conducting single walled carbon nanotube (SWNT) thin films as current collecting electrodes on plastic substrates in zinc oxide nanowire (ZnO NW)/poly(3-hexylthiophene) (P3HT) bulk heterojunction photovoltaic devices is reported. The bulk heterojunctions for exciton dissociation are created by directly growin...

The authors report that the poly 3-hexylthiophene-2,5-diyl P3HT nanogratings shaped by nanoimprint lithography show enhanced hole mobility and strong anisotropy of conductance due to nanoimprint-induced three-dimensional polymer chain alignment. Field effect transistors were fabricated using these nanogratings and device measurements show a hole mobility of 0.03 cm2 /V s along the grating direc...