Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Julia Danhof"'
Autor:
Yoichi Kawakami, Akio Kaneta, Julia Danhof, Ulrich T. Schwarz, Tobias Meyer, Matthias Peter, H.-M. Solowan, Dario Schiavon
Publikováno v:
physica status solidi (b). 249:480-484
We investigated lateral charge carrier transport in indium gallium nitride InGaN/GaN multi-quantum wells for two different samples, one sample emitting green light at about 510 nm and the other emitting cyan light at about 470 nm. For the cyan light
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0546444f55b65088d8bab601421fc39e
https://doi.org/10.1002/pssb.201100476
https://doi.org/10.1002/pssb.201100476
Publikováno v:
physica status solidi (b). 249:600-603
Excitation density-dependent microphotoluminescence measurements were performed on a green light (515 nm) emitting InGaN/GaN multiquantum well sample of low threading dislocation density (5 × 107 cm−2). For the observed structure we find a differe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6954dbab91f37cf84f6155888a86700e
https://doi.org/10.1002/pssb.201147281
https://doi.org/10.1002/pssb.201147281
Autor:
Ulrich T. Schwarz, Clemens Vierheilig, Julia Danhof, Matthias Peter, Berthold Hahn, Tobias Meyer
Publikováno v:
physica status solidi (b). 248:1270-1274
For an InGaN/GaN multiquantum well sample with low threading dislocation density (TDD), temperature-dependent microphotoluminescence measurements were performed. Evaluation of the behavior of the photoluminescence peak energy leads to the conclusion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b429299efe98d6abb58cfd52b7295f1
https://doi.org/10.1002/pssb.201046108
https://doi.org/10.1002/pssb.201046108
Publikováno v:
physica status solidi (a). 208:1523-1525
Micro-electroluminescence measurements were performed on multiple quantum well samples grown on sapphire and GaN substrates with emission wavelength 495 nm. Meandering structures were found both in intensity and peak energy. Areas with higher emissio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cf6c75573ae3c5541c626d4dbc0134b
https://doi.org/10.1002/pssa.201000972
https://doi.org/10.1002/pssa.201000972
Autor:
Chunyu Wang, Volker Cimalla, Ulrich T. Schwarz, Andreas Menzel, Julia Danhof, Lutz Kirste, Margit Zacharias, Yang Yang, Kittitat Subannajui, Firat Güder
Publikováno v:
Nanotechnology. 23(23)
In this work, the controlled fabrication of highly ordered ZnO nanowire (NW) arrays on silicon substrates is reported. Si NWs fabricated by a combination of phase shift lithography and etching are used as a template and are subsequently substituted b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08ba0a36fa356c0ac4446aa8f74c18c4
https://pubmed.ncbi.nlm.nih.gov/22609898
https://pubmed.ncbi.nlm.nih.gov/22609898
Autor:
Julia Danhof, Firat Güder, Kittitat Subannajui, Niranjan S. Ramgir, Chunyu Wang, Daniel Hiller, Margit Zacharias, Ulrich T. Schwarz, Andreas Menzel, Yang Yang, A. M. Hartel, Rajeevan Kozhummal, Volker Cimalla
A new technique is reported for the transformation of smooth nonpolar ZnO nanowire surfaces to zigzagged high-index polar surfaces using polycrystalline ZnO thin films deposited by atomic layer deposition (ALD). The c-axis-oriented ZnO nanowires with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::141894f865eedba10b3b17d72cd801bf
https://publica.fraunhofer.de/handle/publica/229198
https://publica.fraunhofer.de/handle/publica/229198
Publikováno v:
Physical Review B. 84
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::040364af2c6501b41187986fd5465608
https://doi.org/10.1103/physrevb.84.035324
https://doi.org/10.1103/physrevb.84.035324
Autor:
Berthold Hahn, Julia Danhof, Ulrich T. Schwarz, M. Maier, Tobias Meyer, Clemens Vierheilig, Matthias Peter, Joachim Wagner
For InGaN/GaN multiple quantum well structures a correlation of surface morphology and photoluminescence fluctuations has been established by comparing atomic force microscopy images with PL measurements of the same area. The two analyzed samples wer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73f4c911ad74e4ad45a6c9a77cf05176
https://publica.fraunhofer.de/handle/publica/220885
https://publica.fraunhofer.de/handle/publica/220885
Publikováno v:
Japanese Journal of Applied Physics. 52:08JK07
The temperature dependence of the diffusion constant of an InGaN/GaN multi quantum well (MQW) emitting at 465 nm is studied by time of flight measurements. Utilizing a confocal microscopy setup and scanning the pinhole across the image plane allows u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3b132a339045c5294f83d3628c23a05
https://doi.org/10.7567/jjap.52.08jk07
https://doi.org/10.7567/jjap.52.08jk07
Publikováno v:
Applied Physics Letters. 99:023105
We report the influence of size controlled interfacial voids on the optical properties of non-epitaxial polycrystalline ZnO films grown by atomic layer deposition. Interfacial voids generated due to nanoscale Kirkendall effect [A. D. Smigelskas and E
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59b2648936559d374c6ba8d9e8d49d34
https://doi.org/10.1063/1.3609321
https://doi.org/10.1063/1.3609321