ITO-free organic solar cells are fabricated on glass and flexible substrates. The efficiencies of these plastic substrates (3.27% 2.8%, respectively) were comparable to those ITO-based devices (3.66% 2.9%, respectively). Furthermore, in the flexibility test manifested superior mechanical robustness compared with cells.

Fully printed perovskite solar cells are demonstrated with slot-die coating, a scalable printing method. A sequential coating process is developed to produce efficient and be used in large-scale roll-to-roll process. All layers excluding the electrodes devices demonstrate up 11.96% power conversion efficiency. It also that new can production. As service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may re-organized for...

To enhance solar harvesting in organic cells, uniform-sized metal nanoparticles of ∼13 nm were incorporated to the device via pulse-current electrodeposition, which is a kind simple and quick solution process that can control density size nanoparticles. By incorporating plasmonic Ag on surface modified transparent electrodes, overall power conversion efficiency was increased from 3.05% 3.69%, mainly resulting improved photocurrent as result enhanced absorption photoactive conjugate polymer...

A model for the formation of holographic surface relief gratings in azobenzene functionalized polymers is presented. Forces leading to migration polymer chains upon exposure light absorption band azo chromophore are attributed dipoles interacting with gradient electric field present material. Efficient trans–cis cycling azobenzenes allows cooperative movement chromophores under influence forces.

The preparation of a reduced graphene oxide (pr-Go) is with novel p-TosNHNH2 reductant demonstrated for use as an efficient anode interfacial layer high-performance and highstability organic solar cells (OSCs). efficiency the pr-GO highly comparable to those PEDOT:PSSbased devices. Furthermore, based OSCs show much longer cell life time in air stability tests comparison PEDOT:PSS-based cells. Detailed facts importance specialist readers are published "Supporting Information". Such documents...

Abstract Changes in the nanoscale morphologies of blend films poly (3‐hexylthiophene) (P3HT) and [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester (PCBM), for high‐performance bulk‐heterojunction (BHJ) solar cells, are compared investigated two annealing treatments with different morphology evolution time scales, having special consideration diffusion aggregation PCBM molecules. An condition relatively fast molecules during P3HT crystallization results poor BHJ because prevention formation more...

A highly conductive poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film, obtained by addition of a polar solvent, dimethylsulfoxide (DMSO), to an aqueous solution PEDOT:PSS, was thoroughly investigated gain deeper understanding the fundamental characteristics solvent-modified PEDOT:PSS film. Use DMSO-modified film as transparent anode achieve low-cost and high-efficiency ITO-free organic solar cells (OSCs) based on poly(3-hexylthiophene) (P3HT)...

Abstract Organic field‐effect transistor (FET) memory is an emerging technology with the potential to realize light‐weight, low‐cost, flexible charge storage media. Here, solution‐processed poly[9,9‐dioctylfluorenyl‐2,7‐diyl]‐co‐(bithiophene)] (F8T2) nano floating gate (NFGM) a top‐gate/bottom‐contact device configuration reported. A reversible shift in threshold voltage ( V Th ) and reliable characteristics was achieved by incorporation of thin Au nanoparticles (NPs) as sites for negative...

A 3D printer based slot-die coater is developed as a lab-to-fab translation tool for solution-processed solar cells. The modified used to develop the printing process potential use in large scale roll-to-roll production. Fabrication of 47.3 cm2 organic cell module with 4.56% efficiency and printed perovskite cells 11.6% are demonstrated. As service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized online...

Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies rapidly increased to over 10% and further improvements are expected. However, poor device reproducibility PeSCs ascribed their inhomogeneously covered film morphology has hindered practical application. Here, we demonstrate high-performance with superior by introducing small amounts N-cyclohexyl-2-pyrrolidone (CHP) as a controller into...

Large-area polymer FET arrays and integrated circuits (ICs) are successfully demonstrated via a simple wire-bar–coating process. Both highly crystalline conjugated layer very smooth insulating formed by consecutive process on 4-inch plastic substrate with short processing time for application as the active dielectric layers of OFET ICs. As service to our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may be re-organized online...

Abstract The effects of using a blocking dielectric layer and metal nanoparticles (NPs) as charge‐trapping sites on the characteristics organic nano‐floating‐gate memory (NFGM) devices are investigated. High‐performance NFGM fabricated n‐type polymer semiconductor, poly{[ N , ′‐bis(2‐octyldodecyl)‐naphthalene‐1,4,5,8‐bis(dicarboximide)‐2,6‐diyl]‐alt‐5,5′‐(2,2′‐bithiophene)} (P(NDI2OD‐T2)), various NPs. These NPs embedded within bilayers dielectrics (polystyrene (PS)/poly(4‐vinyl phenol)...

Abstract Organic non‐volatile memory (ONVM) based on pentacene field‐effect transistors (FETs) has been fabricated using various chargeable thin polymer gate dielectrics—termed electrets—onto silicon oxide insulating layers. The overall transfer curve of organic FETs is significantly shifted in both positive and negative directions the shifts threshold voltage ( V Th ) can be systemically reversibly controlled via relatively brief application appropriate external bias. stable for a long...

The authors report on a spray deposition method as cost-efficient technique for the fabrication of organic solar cells (OSCs). Active layers OSCs were fabricated using conventional handheld airbrushes. Although deposited film showed relatively rougher surface than spin coated ones, pinhole-free and constant thickness films could be obtained. An optimized OSC 2.83% power conversion efficiency 52% incident photon to current even though device was in air. performance sprayed comparable that devices

Abstract Here, an investigation of three‐dimensional (3D) morphologies for bulk heterojunction (BHJ) films based on regioregular poly(3‐hexylthiophene) (P3HT) and [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester (PCBM) is reported. Based the results, it demonstrated that optimized post‐treatment, such as solvent annealing, forces PCBM molecules to migrate or diffuse toward top surface BHJ composite films, which induces a new vertical component distribution favorable enhancing internal quantum...

Indium tin oxide (ITO) substrates modified with self-assembled monolayers (SAMs) were used to control the anode work function and active layer morphology of organic solar cells based on poly(3-hexylthiophene)/[6:6]-phenyl-C61 butyric acid methyl ester heterojunctions. By using SAMs terminal groups –NH2, –CH3, –CF3, authors able hole injection barrier ITO closer highest occupied molecular orbital level surface energy substrate. A cell device CF3 SAM treated was found exhibit high efficiency...

Abstract Polymer‐based photovoltaic cells, with periodic sub‐micrometer structures as an efficient light‐trapping scheme, are investigated to improve the performance of organic solar cells based on poly(3‐hexylthiophene) and 1‐(3‐methoxycarbonyl)propyl‐1‐phenyl‐(6,6)C 61 . A soft lithographic approach that uses photoresponsive azo polymer films masters poly(dimethylsiloxane) stamps is used form surface relief gratings (SRGs) active layers. The effect cell precisely according various grating...

Abstract Novel poly[(9,9‐bis((6′‐( N , ‐trimethylammonium)hexyl)‐2,7‐fluorene)‐ alt ‐(9,9‐bis(2‐(2‐(2‐methoxyethoxy)ethoxy)ethyl)‐9‐fluorene)) dibromide (WPF‐6‐oxy‐F) and ‐(9,9‐bis(2‐(2‐methoxyethoxy)ethyl)‐fluorene)] (WPF‐oxy‐F) compounds are developed the use of these water‐soluble polymers as an interfacial layer for low‐cost poly(3‐hexylthiophene):phenyl‐C 61 butyric acid methyl ester (P3HT:PCBM) organic solar cells (OSCs) is investigated. When WPF‐oxy‐F or WPF‐6‐oxy‐F simply inserted...

Organic phototransistors (OPTs) were fabricated from pentacene and copper phthalocyanine (CuPC) based on the geometry of organic field-effect transistors (OFETs); effect wavelength incident light source their performance was examined. High OFETs with CuPC characteristics OPTs examined under UV visible-light irradiations top illumination. The show a high responsivities 0.5–2 10–50A∕W maximum IPh∕IDark 3000 1.3×105, respectively, 365nm light. However, visible light, at 650nm, had 100 times...

A remarkable enhancement of p-channel properties is achieved in initially n-channel dominant ambipolar P(NDI2OD-T2) organic field-effect transistors (OFETs) by the use fluorinated high-k dielectric P(VDF-TrFE). An almost two orders magnitude increase hole mobility (∼0.11 cm2 V−1 s−1) originates from a strong interface modification at semiconductor/dielectric interface, which provides high-performance complementary-like inverters and ring oscillator circuits.

In the present study, a novel polar-solvent vapor annealing (PSVA) was used to induce significant structural rearrangement in poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films order improve their electrical conductivity and work function. The effects of on PEDOT:PSS were systematically compared with those conventional solvent additive method (SAM) investigated detail by analyzing changes conductivity, morphology, top bottom surface composition, conformational PEDOT...

In this report, we investigate a formation mechanism for polymer chains aligned with various semiconductor polymers and microstructure directionally film through systematic analysis that includes polarized UV–visible–near infrared (UV–vis–NIR) absorption spectroscopy, atomic force microscopy, charge modulation microscopy (p-CMM), incident X-ray diffraction (GIXD) measurements. Through study, make two important observations: first, the highly organic films are achieved by off-center spin...

We report highly photosensitive organic phototransistors (OPTs) based on a 2,5-bis-biphenyl-4-yl-thieno[3,2-b]thiophene (BPTT). The measured maximum sensitivity and the ratio of photocurrent to dark current (Iph∕Idark) in BPTT OPTs were 82A∕W 2.0×105 under 380nm UV light with 1.55mW∕cm2, respectively. prepared show response similar absorption spectrum BPTT. major mechanisms for amplification this device verified from experimental results as photovoltaic (turn-on) effect (turn-off) by fitting...