Recent Progress in Hole‐Transporting Layers of Conventional Organic Solar Cells with p–i–n Structure

Zhang, Xuning; Zhang, Hong; Li, Yanxun; Zafar, Saud Uz; Yang, Shuo; Chen, Jianhui; Zhou, Huiqiong; Zhang, Yuan

doi:10.1002/adfm.202205398

Cited by 42 publications

(43 citation statements)

References 214 publications

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“…Alternatively, because of the extremely high conductivity, good processability, and outstanding electrochemical stability, the recently emerged poly(3,4-ethylenedioxythiophene) (PEDOT) has demonstrated huge potentials as a hole-transporting layer in solar cells, − high-performance flexible materials in thermoelectric devices, , and high-rate electrodes in electrochemical energy harvesting. − As compared with the PANi and PPy counterparts, it should be mentioned that the PEDOT possesses extremely high conductivity. For instance, the conductivity of the PEDOT film prepared by oxidative chemical vapor deposition and HBr acid treatment reaches as high as 6259 S cm –1 .…”

Section: Introductionmentioning

confidence: 99%

Highly Flexible PEDOT Film Assembled with Solution-Processed Nanowires for High-Rate and Long-Life Solid-State Supercapacitors

Han

Sun

et al. 2023

ACS Sustainable Chem. Eng.

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Self-supporting highly conductive polymers are strongly demanded for high-rate flexible supercapacitors. In this work, we demonstrate that solution-processed poly(3,4-ethylenedioxythiophene) (PEDOT) nanowires with tens of micrometers in length can facilely assemble into highly flexible PEDOT films for high-rate supercapacitors. Our results show that the conductivity of the films (50.8−100 S cm −1 ) relies on the polymerization time of the nanowires and longer time favors doping of dodecyl sulfate anions but results in a decrease of carrier mobility from 16.08 to 6.05 cm 2 V −1 s −1 . A specific capacitance of 137 F g −1 along with 98% capacitance retention after 10 000 cycles has been achieved in 1 M H 2 SO 4 . Moreover, due to the favorable ion and electron pathways and rapid pseudocapacitive redox reactions, these PEDOT films exhibit nearly thickness-independent capacitive performance even as the film thickness increases up to 100 μm. A solid-state capacitor built with a PEDOT film delivers an energy density of 1.38 mWh cm −3 at 27.9 mW cm −3 . Meanwhile, it also exhibits superior long-term electrochemical stability without obvious capacitance decay and excellent structural integrity under various deformation tests. These outstanding properties demonstrate that the PEDOT nanowires could become one of the promising building blocks for developing flexible electrodes with an interconnected network for future high-rate energy storage devices.

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Section: Introductionmentioning

confidence: 99%

Highly Flexible PEDOT Film Assembled with Solution-Processed Nanowires for High-Rate and Long-Life Solid-State Supercapacitors

Han

Sun

et al. 2023

ACS Sustainable Chem. Eng.

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“…Tungsten oxides are naturally abundant, environmentally friendly, and their semiconductor properties can be tuned according to oxygen content and crystalline state [ 1 ]. Furthermore, they are easily produced in the form of thin films or coatings, making them special candidates for a variety of energy-related applications, such as smart windows [ 1 ], batteries [ 2 ], photocatalysis [ 3 ] or solar cells [ 4 ], and also for faster gas sensors [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Polycrystalline WO3−x Thin Films Obtained by Reactive DC Sputtering at Room Temperature

Guillén

2023

Materials

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Tungsten oxide thin films have applications in various energy-related devices owing to their versatile semiconductor properties, which depend on the oxygen content and crystalline state. The concentration of electrons increases with intrinsic defects such as oxygen vacancies, which create new absorption bands that give rise to colored films. Disorders in the crystal structure produce additional changes in the electrical and optical characteristics. Here, WO3−x thin films are prepared on unheated glass substrates by reactive DC sputtering from a pure metal target, using the discharge power and the oxygen-to-argon pressure ratio as control parameters. A transition from amorphous to polycrystalline state is obtained by increasing the sputtering power and adjusting the oxygen content. The surface roughness is higher and the bandgap energy is lower for polycrystalline layers than for amorphous ones. Moreover, the electrical conductivity and sub-bandgap absorption increase as the oxygen content decreases.

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“…To avoid oxidation phenomena and improve hole extraction and collection, the photoactive layer is typically not placed in direct contact with the anode, but a hole transport layer (HTL) is commonly deposited between the ITO and the active layer. [ 5 ] The most used HTL is made of poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) due to its eco‐friendly solution processability, high conductivity, stability, and high light transmittance. [ 6 ]…”

Section: Introductionmentioning

confidence: 99%

Effects of Water/Alcohol Soluble Cationic Polythiophenes as Cathode Interlayers for Eco‐Friendly Solar Cells

Quadretti

Marinelli

Salatelli

et al. 2023

Macro Chemistry & Physics

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Three new ionic polythiophene derivatives, soluble in polar solvents, are synthesized with good yields using simple, low-cost, and straightforward procedures. They are investigated as interfacial cationic conjugated polyelectrolyte (CPE) layers for halogen-free bulk heterojunction polymeric solar cells, based on a water-soluble electron-donor polymer (poly[3-(6-diethanolaminohexyl)thiophene]) and a water-soluble electron-acceptor fullerene derivative (malonodiserinolamide fullerene). The simple insertion of the CPE interlayer between the active layer and the aluminum cathode dramatically increases the power conversion efficiency of the final device up to nearly 5%, resulting from a decrease of the electrode work function, improved electron extraction, and optimization of the morphology of the layers. The obtained results demonstrate that the incorporation of CPE layer is a powerful and convenient methodology for the development of highly efficient and eco-friendly processable polymeric solar cells.

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Recent Progress in Hole‐Transporting Layers of Conventional Organic Solar Cells with p–i–n Structure

Cited by 42 publications

References 214 publications

Highly Flexible PEDOT Film Assembled with Solution-Processed Nanowires for High-Rate and Long-Life Solid-State Supercapacitors

Highly Flexible PEDOT Film Assembled with Solution-Processed Nanowires for High-Rate and Long-Life Solid-State Supercapacitors

Polycrystalline WO3−x Thin Films Obtained by Reactive DC Sputtering at Room Temperature

Effects of Water/Alcohol Soluble Cationic Polythiophenes as Cathode Interlayers for Eco‐Friendly Solar Cells

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