Advanced Optical Materials

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Recently Published Articles

  1. Modern Applications of Plasmonic Nanoparticles: From Energy to Health

    Dorleta Jimenez de Aberasturi, Ana Belén Serrano-Montes and Luis M. Liz-Marzán

    Article first published online: 26 FEB 2015 | DOI: 10.1002/adom.201500053

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    Plasmonic nanoparticles present unique optical properties that render them extremely useful for application in many different fields. Current applications of plasmonic nanoparticles include their use as nanoheaters to effectively kill cancer cells, but they also contribute to the progress of solar energy technology. In this progress report, modern applications of plasmonic nanoparticles from which society may ultimately benefit are highlighted.

  2. Exciton–Polaron-Induced Aggregation of Organic Electroluminescent Materials: A Major Degradation Mechanism in Wide-Bandgap Phosphorescent and Fluorescent Organic Light-Emitting Devices

    Qi Wang and Hany Aziz

    Article first published online: 26 FEB 2015 | DOI: 10.1002/adom.201400640

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    Phosphorescent and fluorescent materials as emitter guests aggregate as a result of electrical stress. Such electrical-driving-induced aggregation occurs more significantly in guest materials with wider bandgaps and less spatially symmetric structures. This process is mainly induced by interactions between excitons and positive polarons that reside on the guests.

  3. Conjugated Polycyanines: A New Class of Materials with Large Third-Order Optical Nonlinearities

    Zhong'an Li, Trenton R. Ensley, Honghua Hu, Yadong Zhang, Sei-Hum Jang, Seth R. Marder, David J. Hagan, Eric W. Van Stryland and Alex K.-Y. Jen

    Article first published online: 26 FEB 2015 | DOI: 10.1002/adom.201400631

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    A fully conjugated polycyanine (AJMPC02) showing a very large Re(γ) value of −9.0 × 10−57 mks at 1.3 μm is synthesized. It is used as a host polymer for anionic TCF-cyanines for creating a complementary polymeric cyanine salt complex, which exhibits a Re(γ) value of −5.6 × 10−57 mks at 1.3 μm. A good optical quality thin film based on AJMPC02-TCF gives a Re(γ) value of −2.1 × 10−18 mks at 1.3 μm and −8.5 × 10−19 mks at 1.55 μm, which are among the highest values reported for molecular materials, and much higher than those derived from silicon.

  4. Tuning a Weak Emissive Blue Host to Highly Efficient Green Dopant by a CN in Tetracarbazolepyridines for Solution-Processed Thermally Activated Delayed Fluorescence Devices

    Chao Tang, Tao Yang, Xudong Cao, Youtian Tao, Fangfang Wang, Cheng Zhong, Yan Qian, Xinwen Zhang and Wei Huang

    Article first published online: 26 FEB 2015 | DOI: 10.1002/adom.201500016

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    Cyanopyridine is used as a new electron-withdrawing unit for thermally activated delayed fluorescence (TADF). Solution-processed simple structure devices using 2,3,5,6-tetracarbazole-4-cyano-pyridine as a green TADF dopant show maximum external quantum efficiencies as high as 10.4% and 11.4% for devices with 2,3,5,6-tetracarbazole-pyridine and 1,3-bis(N-carbazolyl)benzene as host materials, respectively.

  5. Color-Tunable Photoluminescence and NIR Electroluminescence in Carbon Nitride Thin Films and Light-Emitting Diodes

    Jingsan Xu, Menny Shalom, Fortunato Piersimoni, Markus Antonietti, Dieter Neher and Thomas J. K. Brenner

    Article first published online: 26 FEB 2015 | DOI: 10.1002/adom.201500019

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    Color-tunable photoluminescence from continuous graphitic carbon nitride (g-C3N4) thin films is demonstrated. The films are employed in light-emitting diodes. A strong redshift of the electroluminescence with respect to photo­luminescence is observed and a model for this uncommon behavior is provided.