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  • 1.
    Gensch, Marc
    et al.
    DESY, D-22607 Hamburg, Germany.;Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Schwartzkopf, Matthias
    DESY, D-22607 Hamburg, Germany..
    Brett, Calvin
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. KTH, School of Engineering Sciences (SCI), Engineering Mechanics. DESY, D-22607 Hamburg, Germany.;.
    Schaper, Simon J.
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Li, Nian
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Chen, Wei
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Liang, Suzhe
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Drewes, Jonas
    Christian Albrechts Univ Kiel, Lehrstuhl Mat Verbunde, Inst Mat Wissensch, D-24143 Kiel, Germany..
    Polonskyi, Oleksandr
    Univ Calif Santa Barbara, Gordon Lab, Santa Barbara, CA 93106 USA..
    Strunskus, Thomas
    Christian Albrechts Univ Kiel, Lehrstuhl Mat Verbunde, Inst Mat Wissensch, D-24143 Kiel, Germany..
    Faupel, Franz
    Christian Albrechts Univ Kiel, Lehrstuhl Mat Verbunde, Inst Mat Wissensch, D-24143 Kiel, Germany..
    Mueller-Buschbaum, Peter
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.;Tech Univ Munich, Heinz Maier Leibniz Zentrum MLZ, D-85748 Garching, Germany..
    Roth, Stephan V.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Biocomposites. DESY, D-22607 Hamburg, Germany..
    Correlating Optical Reflectance with the Topology of Aluminum Nanocluster Layers Growing on Partially Conjugated Diblock Copolymer Templates2021In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 13, no 47, p. 56663-56673Article in journal (Refereed)
    Abstract [en]

    Large-scale fabrication of metal cluster layers for usage in sensor applications and photovoltaics is a huge challenge. Physical vapor deposition offers large-scale fabrication of metal cluster layers on templates and polymer surfaces. In the case of aluminum (Al), only little is known about the formation and interaction of Al clusters during sputter deposition. Complex polymer surface morphologies can tailor the deposited Al cluster layer. Here, a poly(methyl methacrylate)-block-poly(3-hexylthiophen-2,5-diyl) (PMMA-b-P3HT) diblock copolymer template is used to investigate the nanostructure formation of Al cluster layers on the different polymer domains and to compare it with the respective homopolymers PMMA and P3HT. The optical properties relevant for sensor applications are monitored with ultraviolet-visible (UV-vis) measurements during the sputter deposition. The formation of Al clusters is followed in situ with grazing-incidence small-angle X-ray scattering (GISAXS), and the chemical interaction is revealed by X-ray photoelectron spectroscopy (XPS). Furthermore, atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM) yield topographical information about selective wetting of Al on the P3HT domains and embedding in the PMMA domains in the early stages, followed by four distinct growth stages describing the Al nanostructure formation.

  • 2.
    Guan, Tianfu
    et al.
    Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany..
    Chen, Wei
    Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany.;Shenzhen Technol Univ, Ctr Adv Mat Diagnost Technol, Shenzhen Key Lab Ultraintense Laser & Adv Mat Tech, Shenzhen 518118, Peoples R China.;Shenzhen Technol Univ, Coll Engn Phys, Shenzhen 518118, Peoples R China..
    Tang, Haodong
    Shenzhen Technol Univ, Coll Integrated Circuits & Optoelect Chips, Shenzhen 518118, Peoples R China..
    Li, Dong
    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China..
    Wang, Xiao
    Shenzhen Technol Univ, Ctr Adv Mat Diagnost Technol, Shenzhen Key Lab Ultraintense Laser & Adv Mat Tech, Shenzhen 518118, Peoples R China.;Shenzhen Technol Univ, Coll Engn Phys, Shenzhen 518118, Peoples R China..
    Weindl, Christian L.
    Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany..
    Wang, Yawen
    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China..
    Liang, Zhiqiang
    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China..
    Liang, Suzhe
    Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany..
    Xiao, Tianxiao
    Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany..
    Tu, Suo
    Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany..
    Roth, Stephan V.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fiberprocesser. Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany..
    Jiang, Lin
    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China..
    Mueller-Buschbaum, Peter
    Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany.;Tech Univ Munich, Heinz Maier Leibnitz Zent MLZ, D-85748 Garching, Germany..
    Decoding the Self-Assembly Plasmonic Interface Structure in a PbS Colloidal Quantum Dot Solid for a Photodetector2023In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 17, no 22, p. 23010-23019Article in journal (Refereed)
    Abstract [en]

    Hybrid plasmonic nanostructures have gained enormous attention in a variety of optoelectronic devices due to their surface plasmon resonance properties. Self-assembled hybrid metal/quantum dot (QD) architectures offer a means of coupling the properties of plasmonics and QDs to photodetectors, thereby modifying their functionality. The arrangement and localization of hybrid nanostructures have an impact on exciton trapping and light harvesting. Here, we present a hybrid structure consisting of self-assembled gold nanospheres (Au NSs) embedded in a solid matrix of PbS QDs for mapping the interface structures and the motion of charge carriers. Grazing-incidence small-angle X-ray scattering is utilized to analyze the localization and spacing of the Au NSs within the hybrid structure. Furthermore, by correlating the morphology of the Au NSs in the hybrid structure with the corresponding differences observed in the performance of photodetectors, we are able to determine the impact of interface charge carrier dynamics in the coupling structure. From the perspective of architecture, our study provides insights into the performance improvement of optoelectronic devices.

  • 3.
    Liang, Suzhe
    et al.
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Chen, Wei
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Yin, Shanshan
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Schaper, Simon J.
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Guo, Renjun
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Drewes, Jonas
    Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany..
    Carstens, Niko
    Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany..
    Strunskus, Thomas
    Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany..
    Gensch, Marc
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany.;Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany..
    Schwartzkopf, Matthias
    Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany..
    Faupel, Franz
    Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany..
    Roth, Stephan V.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology. Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, Hamburg, 22607, Germany.
    Cheng, Ya-Jun
    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China.;Univ Oxford, Dept Mat, Oxford OX1 3PH, England..
    Mueller-Buschbaum, Peter
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany.;Tech Univ Munich, Heinz Maier Leibniz Zentrum MLZ, D-85748 Garching, Germany..
    Tailoring the Optical Properties of Sputter-Deposited Gold Nanostructures on Nanostructured Titanium Dioxide Templates Based on In Situ Grazing-Incidence Small-Angle X-ray Scattering Determined Growth Laws2021In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 13, no 12, p. 14283-14295Article in journal (Refereed)
    Abstract [en]

    Gold/titanium dioxide (Au/TiO2) nanohybrid materials have been widely applied in various fields because of their outstanding optical and photocatalytic performance. By state-of-the-art polymer templating, it is possible to make uniform nanostructured TiO2 layers with potentially large-scale processing methods. We use customized polymer templating to achieve TiO2 nanostructures with different morphologies. Au/TiO2 hybrid thin films are fabricated by sputter deposition. An indepth understanding of the Au morphology on the TiO2 templates is achieved with in situ grazing-incidence small-angle X-ray scattering (GISAXS) during the sputter deposition. The resulting Au nanostructure is largely influenced by the TiO2 template morphology. Based on the detailed understanding of the Au growth process, characteristic distances can be selected to achieve tailored Au nanostructures at different Au loadings. For selected sputter-deposited Au/TiO2 hybrid thin films, the optical response with a tailored localized surface plasmon resonance is demonstrated.

  • 4.
    Liang, Suzhe
    et al.
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Guan, Tianfu
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Yin, Shanshan
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Krois, Eva
    Tech Univ Munich, Fak Chem, Inst Wasserchem & Chem Balneol, D-81377 Munich, Germany..
    Chen, Wei
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.;Shenzhen Technol Univ SZTU, Coll Engn Phys, Shenzhen 518118, Peoples R China..
    Everett, Christopher R.
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Drewes, Jonas
    Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany..
    Strunskus, Thomas
    Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany..
    Gensch, Marc
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.;DESY, D-22607 Hamburg, Germany..
    Rubeck, Jan
    DESY, D-22607 Hamburg, Germany..
    Haisch, Christoph
    Tech Univ Munich, Fak Chem, Inst Wasserchem & Chem Balneol, D-81377 Munich, Germany..
    Schwartzkopf, Matthias
    DESY, D-22607 Hamburg, Germany..
    Faupel, Franz
    Christian Albrechts Univ Kiel, Inst Mat Wissensch, Lehrstuhl Mat Verbunde, D-24143 Kiel, Germany..
    Roth, Stephan V.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology. DESY, D-22607 Hamburg, Germany..
    Cheng, Ya-Jun
    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China..
    Mueller-Buschbaum, Peter
    Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany..
    Template-Induced Growth of Sputter-Deposited Gold Nanoparticles on Ordered Porous TiO2 Thin Films for Surface-Enhanced Raman Scattering Sensors2022In: ACS Applied Nano Materials, E-ISSN 2574-0970, Vol. 5, no 5, p. 7492-7501Article in journal (Refereed)
    Abstract [en]

    Ordered porous gold/titanium dioxide (Au/TiO2) hybrid nanostructured films are specifically interesting in large-scale applications using localized surface plasmon resonances (LSPRs) and surface-enhanced Raman scattering (SERS). Deposition of Au nanoparticles via sputter deposition is one of the promising technologies to establish optically active sites at low cost in combination with nanostructured TiO2 films. In this work, we investigate the optical response of sputter-deposited Au/TiO2 nanohybrid thin films with a focus on the plasmonic response and application as molecular sensors. The LSPR peak red shifts with an increasing thickness of deposited Au. The Raman intensity of deposited molecules, probed with rhodamine 6G (R6G), depends on the deposited gold thickness. It has its maximum at an effective Au thickness of 3.4 nm. To elucidate the origin of this behavior, we apply in situ grazing-incidence small-angle X-ray scattering (GISAXS) to investigate the growth kinetics of Au on a TiO2 template during sputter deposition. On the basis of time-resolved GISAXS, the growth characteristics of sputter-deposited Au on a TiO2 template with a final effective Au layer thickness around the percolation threshold is described with the well-known four-stage model of nucleation and cluster formation, diffusion-mediated growth, adsorption-mediated growth, and grain growth. The maximum in SERS intensity is corroborated by the existence and optimal size of hot spots in the narrow space occurring between the sputter-deposited Au clusters, on staying below the percolation threshold. On the basis of the growth laws extracted, we give a guideline for tailoring the ordered porous Au/TiO2 nanohybrid thin films for SERS sensor applications.

  • 5.
    Zou, Yuqin
    et al.
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Yuan, Shuai
    Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China..
    Buyruk, Ali
    Univ Munich LMU, Chair Phys Chem, Dept Chem, D-81377 Munich, Germany.;Univ Munich LMU, Ctr NanoSci CeNS, D-81377 Munich, Germany..
    Eichhorn, Johanna
    Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.;Tech Univ Munich, Phys Dept, D-85748 Garching, Germany..
    Yin, Shanshan
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Reus, Manuel A.
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Xiao, Tianxiao
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Pratap, Shambhavi
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Liang, Suzhe
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Weindl, Christian L.
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Chen, Wei
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany..
    Mu, Cheng
    Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China..
    Sharp, Ian D.
    Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.;Tech Univ Munich, Phys Dept, D-85748 Garching, Germany..
    Ameri, Tayebeh
    Univ Munich LMU, Chair Phys Chem, Dept Chem, D-81377 Munich, Germany.;Univ Munich LMU, Ctr NanoSci CeNS, D-81377 Munich, Germany..
    Schwartzkopf, Matthias
    DESY, D-22607 Hamburg, Germany..
    Roth, Stephan V.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Biocomposites. DESY, D-22607 Hamburg, Germany..
    Mueller-Buschbaum, Peter
    Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany.;Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, D-85748 Garching, Germany..
    The Influence of CsBr on Crystal Orientation and Optoelectronic Properties of MAPbI(3)-Based Solar Cells2022In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 14, no 2, p. 2958-2967Article in journal (Refereed)
    Abstract [en]

    Crystal orientations are closely related to the behavior of photogenerated charge carriers and are vital for controlling the optoelectronic properties of perovskite solar cells. Herein, we propose a facile approach to reveal the effect of lattice plane orientation distribution on the charge carrier kinetics via constructing CsBr-doped mixed cation perovskite phases. With grazing-incidence wide-angle X-ray scattering measurements, we investigate the crystallographic properties of mixed perovskite films at the microscopic scale and reveal the effect of the extrinsic CsBr doping on the stacking behavior of the lattice planes. Combined with transient photocurrent, transient photovoltage, and space-charge-limited current measurements, the transport dynamics and recombination of the photogenerated charge carriers are characterized. It is demonstrated that CsBr compositional engineering can significantly affect the perovskite crystal structure in terms of the orientation distribution of crystal planes and passivation of trap-state densities, as well as simultaneously facilitate the photogenerated charge carrier transport across the absorber and its interfaces. This strategy provides unique insight into the underlying relationship between the stacking pattern of crystal planes, photogenerated charge carrier transport, and optoelectronic properties of solar cells.

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