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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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TL;DR: In this article, the zinc phthalocyanine (ZnPc) was used as a transparent top contact for top-illuminated organic solar cells with ultrathin metal layers as transparent top contacts.
Abstract: We present zinc phthalocyanine (ZnPc):C60 bulk-heterojunction top-illuminated organic solar cells using ultrathin metal layers as transparent top contacts. We show that solar cell performance sensitively depends on the interface and morphology of the cathode, which can be influenced by varying the composition and layer structure of the metal contact. We investigate various metal combinations, such as 3 nm Al/8 nm Ag and 7 nm Al/14 nm Ag, to illustrate the necessity to find a suitable combination of morphology and electrical and optical properties. Solar cells using standard materials and a 1 nm Al/14 nm Ag cathode exhibit promising efficiencies of over 2.2%.
122 citations
Patent•
10 Feb 1983
TL;DR: In this paper, improved electrodes overcoated with conductive polymer films and preselected catalysts are provided, where the electrodes typically consist of an inorganic semiconductor overcovered with a charge-conductive polymer film comprising a charge conductive polymeric polymer in or on which is a catalyst or charge-relaying agent.
Abstract: According to the present invention, improved electrodes overcoated with conductive polymer films and preselected catalysts are provided. The electrodes typically comprise an inorganic semiconductor overcoated with a charge conductive polymer film comprising a charge conductive polymer in or on which is a catalyst or charge-relaying agent.
122 citations
TL;DR: In this paper, a light-emitting diodes based on tris-(8-hydroxyquinoline) aluminium (Alq) on clean indium tin oxide (ITO) was constructed.
121 citations
TL;DR: In situ electrochemical doping and light-emitting junction formation in conjugated polymer films have been visualized by direct imaging of a massive planar device structure under UV illumination as discussed by the authors.
Abstract: In situ electrochemical doping and light-emitting junction formation in conjugated polymer films have been visualized by direct imaging of a massive planar device structure under UV illumination. Both p- and n-doping of conjugated polymers have been observed. When the p- and n-doped regions meet, a light-emitting p–n junction forms and significant current flow begins. The reversal of applied bias creates many tiny and transient light-emitting p–n junctions in the previously n-doped region by the uneven growth of new p-doped areas. Eventually a stable emission zone is formed closer to the new cathode, from a polymer film that shows almost no photoluminescence due to doping.
121 citations
TL;DR: In this article, the authors present photoluminescence studies as a function of temperature from a series of conjugated polymers and a conjugation molecule with distinctly different backbone conformations.
Abstract: We present photoluminescence studies as a function of temperature from a series of conjugated polymers and a conjugated molecule with distinctly different backbone conformations. The organic materials investigated here are: planar methylated ladder type poly para-phenylene, semi-planar polyfluorene, and non-planar para hexaphenyl. In the longer-chain polymers the photoluminescence transition energies blue shift with increasing temperatures. The conjugated molecules, on the other hand, red shift their transition energies with increasing temperatures. Empirical models that explain the temperature dependence of the band gap energies in inorganic semiconductors can be extended to explain the temperature dependence of the transition energies in conjugated molecules.
121 citations