Head of Department Epitaxy
phone: +49 30 20377 359
room: 0714
email: geelhaar@pdi-berlin.de
Department: Semiconductor Spectroscopy Epitaxy
Core research areas: Nanofabrication , III-V nanowires for optoelectronics
1 | Author | B. Park , J. K. Lee , C. T. Koch , M. Wölz , L. Geelhaar , S. H. Oh |
Title |
High-Resolution Mapping of Strain Partitioning and Relaxation in InGaN/GaN Nanowire Heterostructures |
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Source | Advanced Science , xx , xx ( 2022 ) | |
DOI : 10.1002/advs.202200323 | Cite : Bibtex RIS |
2 | Author | M. Al-Humaidi , L. Feigl , J. Jakob , P. Schroth , A. AlHassan , A. Davtyan , J. Herranz , T. Anjum , D. Novikov , S. Francoual , L. Geelhaar , T. Baumbach , U. Pietsch |
Title |
In situ x-ray analysis of misfit strain and curvature of bent polytypic GaAs–InxGa1−xAs core–shell nanowires |
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Source | Nanotechnology , 33 , 015601 ( 2021 ) | |
DOI : 10.1088/1361-6528/ac29d8 | Download arXiv: 2105.09665 | Cite : Bibtex RIS |
3 | Author | Hanno Küpers , Ryan B. Lewis , Pierre Corfdir , Michael Niehle , T. Flissikowski , H. T. Grahn , A. Trampert , O. Brandt , L. Geelhaar |
Title |
Drastic effect of sequential deposition resulting from flux directionality for the luminescence efficiency of nanowire shells |
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Source | ACS Appl. Mater. Interfaces , 13 , 50220 ( 2021 ) | |
DOI : 10.1021/acsami.1c12371 | Download arXiv: 2106.12309 | Cite : Bibtex RIS |
4 | Author | D. Bahrami , A. Al Hassan , A. Davtyan , R. Zhe , T. Anjum , J. Herranz , L. Geelhaar , D. V. Novikov , R. Timm , U. Pietsch |
Title |
Impact of electrical current on single GaAs nanowire structure |
|
Source | Phys. Status Solidi B , 258 , 2100056 ( 2021 ) | |
DOI : 10.1002/pssb.202100056 | Cite : Bibtex RIS |
5 | Author | T. Auzelle , M. Azadmand , T. Flissikowski , M. Ramsteiner , K. Morgenroth , C. Stemmler , S. Fernández-Garrido , S. Sanguinetti , H. T. Grahn , L. Geelhaar , O. Brandt |
Title |
Enhanced radiative efficiency in GaN nanowires grown on sputtered TiNx |
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Source | ACS Photonics , 8 , 1718 ( 2021 ) | |
DOI : 10.1021/acsphotonics.1c00224 | Download arXiv: 2001.06387 | Cite : Bibtex RIS |
6 | Author | A. Al Hassan , W. A. Salehi , R. B. Lewis , T. Anjum , C. Sternemann , L. Geelhaar , U. Pietsch |
Title |
Transition from elastic to plastic strain release in core−shell nanowires revealed by in-plane x-ray diffraction |
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Source | Nanotechnology , 32 , 205705 ( 2021 ) | |
DOI : 10.1088/1361-6528/abe5db | Cite : Bibtex RIS |
7 | Author | L. Jaloustre , S. Le-Denmat , T. Auzelle , M. Azadmand , L. Geelhaar , F. Dahlem , R. Songmuang |
Title |
Toward Quantitative Measurements of Piezoelectricity in III-N Semiconductor Nanowires |
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Source | ACS Appl. Nano Mater. , 4 , 43 ( 2021 ) | |
DOI : 10.1021/acsanm.0c02078 | Download arXiv: 1910.01187 | Cite : Bibtex RIS |
8 | Author | J. Kamimura , M. Budde , P. Bogdanoff , C. Tschammer , F. F. Abdi , R. van de Krol , O. Bierwagen , H. Riechert , L. Geelhaar |
Title |
Protection Mechanism against Photocorrosion of GaN Photoanodes Provided by NiO Thin Layers |
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Source | Sol. RRL , 4 , 2000568 ( 2020 ) | |
DOI : 10.1002/solr.202000568 | Cite : Bibtex RIS |
9 | Author | A. Davtyan , D. Kriegner , V. Holý , A. AlHassan , R.B. Lewis , S. McDermott , L. Geelhaar , D. Bahrami , T. Anjum , Z. Ren , C. Richter , D. Novikov , J. Müller , B. Butz , U. Pietsch |
Title |
X-ray diffraction reveals the amount of strain and homogeneity of extremely bent single nanowires |
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Source | J. Appl. Cryst. , 53 , 1310 ( 2020 ) | |
DOI : 10.1107/S1600576720011516 | Cite : Bibtex RIS |
10 | Author | Y. Zhao , Z. Xing , L. Geelhaar , J. Zhang , W. Yang , T. Auzelle , Y. Wu , L. Bian , S. Lu |
Title |
Detaching highly flexible and transparent (In,Ga)N nanowire films by a low-cost and stable electrochemical procedure |
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Source | ACS Appl. Nano Mater. , 3 , 9943 ( 2020 ) | |
DOI : 10.1021/acsanm.0c01970 | Cite : Bibtex RIS |