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Organic semiconductor

About: Organic semiconductor is a research topic. Over the lifetime, 15905 publications have been published within this topic receiving 533881 citations.


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Journal ArticleDOI
TL;DR: The power conversion efficiency potential of eight high-performance polymer-fullerene blends is investigated and all studied absorbers show the typical organic solar cell losses limiting their performance to ≈13%.
Abstract: The power conversion efficiency potential of eight high-performance polymer-fullerene blends is investigated. All studied absorbers show the typical organic solar cell losses limiting their performance to ≈13%.

175 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used polyimide gate dielectric layers to fabricate high-quality pentacene field effect transistors on polyethylenenaphthalate-based films.
Abstract: Polyimide gate dielectric layers cured at 180 °C have been employed to fabricate high-quality pentacene field-effect transistors on polyethylenenaphthalate-based films. The surface roughness (root-mean square) of gate dielectric layers characterized by atomic force microscopy is only 0.2 nm, while that of the base film is 1 nm. The transistors with pentacene channel layers deposited on 990 nm polyimide gate dielectric layers attain the on/off ratio of 106 and mobility of 0.3 cm2/V s. Furthermore, by decreasing the thickness of polyimide gate dielectric layers down to 540 nm, the mobility is enhanced up to 1 cm2/V s.

175 citations

Journal ArticleDOI
TL;DR: In this paper, the macroscopic electrical field distribution is determined using capacitance-voltage and Kelvin probe techniques, and charge collection properties are then accessible relying on the relative weight that diffusion and drift have as carrier transport driven forces.
Abstract: Hybrid lead halide perovskites (PVKs) have emerged as novel materials for photovoltaics and have rapidly reached very large solar to electricity power conversion efficiencies. As occurring with other kind of solar technologies establishing the working energy-band diagram constitutes a primary goal for device physics analysis. Here, the macroscopic electrical field distribution is experimentally determined using capacitance-voltage and Kelvin probe techniques. Planar structures comprising CH3NH3PbI3−xClx PVK exhibit p-doping character and form a p-n heterojunction with n-doped TiO2 compact layers. Depletion width at equilibrium within the PVK bulk has an extent about 300 nm (approximately half of the layer thickness), leaving as a consequence a significant neutral zone towards the anode contact. Charge collection properties are then accessible relying on the relative weight that diffusion and drift have as carrier transport driven forces.

174 citations

Journal ArticleDOI
TL;DR: Band-like charge transport in vacuum-deposited small-molecule thin films for organic phototransistor arrays which can be operated at very low dark currents are reported, wherein, unprecedentedly, a detectivity greater than 1017 cm Hz1/2 W−1 is obtained.
Abstract: With the fast development of organic electronics, organic semiconductors have been extensively studied for various optoelectronic applications, among which organic phototransistors recently emerged as one of the most promising light signal detectors. However, it is still a big challenge to endow organic phototransistors with both high mobility and high light-sensitivity because the low mobility of most organic photoresponsive materials limits the efficiency of transporting and collecting charge carriers. We herein report band-like charge transport in vacuum-deposited small-molecule thin films for organic phototransistor arrays which can be operated at very low dark currents (~10−12 A). Both high mobility and excellent optical figures of merit including photosensitivity, photoresponsivity and detectivity are achieved, wherein, unprecedentedly, a detectivity greater than 1017 cm Hz1/2 W−1 is obtained. All these key parameters are superior to state-of-the-art organic phototransistors, implying a great potential in optoelectronic applications. The potential of organic phototransistors to surpass silicon-based devices is limited by the low carrier mobility of organic photoresponsive materials. Here, Ji et al. report high performance organic phototransistors featuring vacuum-deposited small-molecule films with band-like charge transport.

174 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023258
2022558
2021580
2020697
2019701
2018713