TY - JOUR A1 - Zen, Achmad A1 - Bilge, Askin A1 - Galbrecht, Frank A1 - Alle, Ronald A1 - Meerholz, Klaus A1 - Grenzer, Jörg A1 - Neher, Dieter A1 - Scherf, Ullrich A1 - Farrell, Tony T1 - Solution processable organic field-effect transistors utilizing an alpha,alpha '-dihexylpentathiophene- based swivel cruciform Y1 - 2006 UR - http://pubs.acs.org/doi/full/10.1021/ja0573357 U6 - https://doi.org/10.1021/Ja0573357 ER - TY - JOUR A1 - Yang, Xiaohui A1 - Müller, David C. A1 - Neher, Dieter A1 - Meerholz, Klaus T1 - Highly efficient polymeric electrophosphorescent diodes N2 - Polymeric electrophosphorescent LEDs with internal quantum efficiencies approaching unity have been fabricated. Such performance levels are previously unknown for OLEDs. The key to this success is redox chemically doped oxetane- crosslinkable hole-transporting layers with multilayer capability (see figure). They improve hole injection and act as electron-blocking layers, without the need to include exciton-or hole-blocking layers Y1 - 2006 UR - 1960 = DOI: 10.1002/adma.200501867 ER - TY - JOUR A1 - Kulikovsky, Lazar A1 - Neher, Dieter A1 - Mecher, E. A1 - Meerholz, Klaus A1 - Horhold, H. H. A1 - Ostroverkhova, O. T1 - Photocurrent dynamics in a poly(phenylene vinylene)-based photorefractive composite N2 - All parameters describing the charge carrier dynamics in a poly(phenylene vinylene)-based photorefractive (PR) composite relevant to PR grating dynamics were determined using photoconductivity studies under various illumination conditions. In particular, the values of the coefficients for trap filling and recombination of charges with ionized sensitizer molecules could be extracted independently. It is concluded that the PR growth time without preillumination is mostly determined by the competition between deep trap filling and recombination with ionized sensitizer molecules. Further, the pronounced increase in PR speed upon homogeneous preillumination (gating) as reported recently is quantitatively explained by deep trap filling Y1 - 2004 SN - 1098-0121 ER - TY - JOUR A1 - Halbrügge, Lena A1 - Banerji, Amitabh A1 - Meerholz, Klaus T1 - Hallo Zukunft! BT - gedruckte Elektronik als Hands-on-Experiment für die Lehre in den Naturwissenschaften an (Hoch-)Schulen JF - Chemie konkret : CHEMKON ; Forum für Unterricht und Didaktik N2 - Gedruckte Elektronik ist nicht nur ein aufstrebendes Forschungsfeld, sie wird in naher Zukunft auch eine wesentliche Rolle in unserem Alltag spielen. Gedruckte, elektronische Bauteile können sehr dünn und flexibel sein und somit vielfältig eingesetzt werden. Für die Implementation in der (Hoch-)Schule haben die Autoren eine flexible, lichtemittierende Folie entwickelt, die mit einfachen Materialien und Methoden manuell gedruckt werden kann. N2 - Printed electronics is an emerging research field and is going to play a vital role in our everyday-life in the near future. Printed electronic devices can be very thin and flexible, which makes them feasible for various applications. For the implementation in High Schools and Universities the authors developed a flexible, light emitting foil, which can be printed manually using simple materials and methods. T2 - Hello future! Printed electronics as a hands-on-experiment for teaching science in high schools and universities KW - curriculum innovation KW - experiment KW - electroluminescence KW - semiconductor KW - curriculare Innovation KW - Experiment KW - Elektrolumineszenz KW - Halbleiter Y1 - 2022 U6 - https://doi.org/10.1002/ckon.202200030 SN - 0944-5846 SN - 1521-3730 VL - 29 IS - 51 SP - 355 EP - 361 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Gross, M. A1 - Müller, David C. A1 - Nothofer, Heinz-Georg A1 - Scherf, Ullrich A1 - Neher, Dieter A1 - Bräuchler, C. A1 - Meerholz, Klaus T1 - Improving the performance of doped p-conjugated polymers for use in organic light-emitting diodes Y1 - 2000 ER - TY - JOUR A1 - Däubler, Thomas Karl A1 - Bittner, Reinhard A1 - Meerholz, Klaus A1 - Neher, Dieter T1 - Charge carrier photogeneration, trapping and space-charge field formation in PVK-based photorefractive materials Y1 - 2000 ER - TY - JOUR A1 - Brinkmann, Kai Oliver A1 - Becker, Tim A1 - Zimmermann, Florian A1 - Kreusel, Cedric A1 - Gahlmann, Tobias A1 - Theisen, Manuel A1 - Haeger, Tobias A1 - Olthof, Selina A1 - Tückmantel, Christian A1 - Günster, M. A1 - Maschwitz, Timo A1 - Göbelsmann, Fabian A1 - Koch, Christine A1 - Hertel, Dirk A1 - Caprioglio, Pietro A1 - Peña-Camargo, Francisco A1 - Perdigón-Toro, Lorena A1 - Al-Ashouri, Amran A1 - Merten, Lena A1 - Hinderhofer, Alexander A1 - Gomell, Leonie A1 - Zhang, Siyuan A1 - Schreiber, Frank A1 - Albrecht, Steve A1 - Meerholz, Klaus A1 - Neher, Dieter A1 - Stolterfoht, Martin A1 - Riedl, Thomas T1 - Perovskite-organic tandem solar cells with indium oxide interconnect JF - Nature N2 - Multijunction solar cells can overcome the fundamental efficiency limits of single-junction devices. The bandgap tunability of metal halide perovskite solar cells renders them attractive for multijunction architectures(1). Combinations with silicon and copper indium gallium selenide (CIGS), as well as all-perovskite tandem cells, have been reported(2-5). Meanwhile, narrow-gap non-fullerene acceptors have unlocked skyrocketing efficiencies for organic solar cells(6,7). Organic and perovskite semiconductors are an attractive combination, sharing similar processing technologies. Currently, perovskite-organic tandems show subpar efficiencies and are limited by the low open-circuit voltage (V-oc) of wide-gap perovskite cells(8) and losses introduced by the interconnect between the subcells(9,10). Here we demonstrate perovskite-organic tandem cells with an efficiency of 24.0 per cent (certified 23.1 per cent) and a high V-oc of 2.15 volts. Optimized charge extraction layers afford perovskite subcells with an outstanding combination of high V-oc and fill factor. The organic subcells provide a high external quantum efficiency in the near-infrared and, in contrast to paradigmatic concerns about limited photostability of non-fullerene cells(11), show an outstanding operational stability if excitons are predominantly generated on the non-fullerene acceptor, which is the case in our tandems. The subcells are connected by an ultrathin (approximately 1.5 nanometres) metal-like indium oxide layer with unprecedented low optical/electrical losses. This work sets a milestone for perovskite-organic tandems, which outperform the best p-i-n perovskite single junctions(12) and are on a par with perovskite-CIGS and all-perovskite multijunctions(13). Y1 - 2022 U6 - https://doi.org/10.1038/s41586-022-04455-0 SN - 0028-0836 SN - 1476-4687 VL - 604 IS - 7905 SP - 280 EP - 286 PB - Nature Research CY - Berlin ER - TY - JOUR A1 - Bittner, Reinhard A1 - Däubler, Thomas Karl A1 - Neher, Dieter A1 - Meerholz, Klaus T1 - Influence of the glass-transition and the chromophore content on the steady-state performance of PVK-based photorefractive polymers Y1 - 1999 ER -