Dr. Lutz Geelhaar

Head of Department Epitaxy

Lutz Geelhaar

Telefon: +49 30 20377 359

Raum: 0714

Email: geelhaar@pdi-berlin.de

 

Abteilung: Epitaxy

Core research areas: Nanofabrication , III-V nanowires for optoelectronics

 

 

1 Autor B. Park , J. K. Lee , C. T. Koch , M. Wölz , L. Geelhaar , S. H. Oh
Titel

High-Resolution Mapping of Strain Partitioning and Relaxation in InGaN/GaN Nanowire Heterostructures

Source Advanced Science , xx , xx ( 2022 )
DOI : 10.1002/advs.202200323 | 3300 Cite : Bibtex RIS
B. Park, J. K. Lee, C. T. Koch, M. Wölz, L. Geelhaar, and S. H. Oh

2 Autor 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
Titel

In situ x-ray analysis of misfit strain and curvature of bent polytypic GaAs–InxGa1−xAs core–shell nanowires

Source Nanotechnology , 33 , 015601 ( 2021 )
DOI : 10.1088/1361-6528/ac29d8 | arxiv: 2105.09665 | 3270 Cite : Bibtex RIS
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, and U. Pietsch

3 Autor Hanno Küpers , Ryan B. Lewis , Pierre Corfdir , Michael Niehle , T. Flissikowski , H. T. Grahn , A. Trampert , O. Brandt , L. Geelhaar
Titel

Drastic effect of sequential deposition resulting from flux directionality for the luminescence efficiency of nanowire shells

Source ACS Appl. Mater. Interfaces , 13 , 50220 ( 2021 )
DOI : 10.1021/acsami.1c12371 | arxiv: 2106.12309 | 3255 Cite : Bibtex RIS
Hanno Küpers, Ryan B. Lewis, Pierre Corfdir, Michael Niehle, T. Flissikowski, H. T. Grahn, A. Trampert, O. Brandt, and L. Geelhaar

4 Autor D. Bahrami , A. Al Hassan , A. Davtyan , R. Zhe , T. Anjum , J. Herranz , L. Geelhaar , D. V. Novikov , R. Timm , U. Pietsch
Titel

Impact of electrical current on single GaAs nanowire structure

Source Phys. Status Solidi B , 258 , 2100056 ( 2021 )
DOI : 10.1002/pssb.202100056 | 3257 Cite : Bibtex RIS
D. Bahrami, A. Al Hassan, A. Davtyan, R. Zhe, T. Anjum, J. Herranz, L. Geelhaar, D. V. Novikov, R. Timm, and U. Pietsch

5 Autor T. Auzelle , M. Azadmand , T. Flissikowski , M. Ramsteiner , K. Morgenroth , C. Stemmler , S. Fernández-Garrido , S. Sanguinetti , H. T. Grahn , L. Geelhaar , O. Brandt
Titel

Enhanced radiative efficiency in GaN nanowires grown on sputtered TiNx

Source ACS Photonics , 8 , 1718 ( 2021 )
DOI : 10.1021/acsphotonics.1c00224 | arxiv: 2001.06387 | 3166 Cite : Bibtex RIS
T. Auzelle, M. Azadmand, T. Flissikowski, M. Ramsteiner, K. Morgenroth, C. Stemmler, S. Fernández-Garrido, S. Sanguinetti, H. T. Grahn, L. Geelhaar, and O. Brandt

6 Autor A. Al Hassan , W. A. Salehi , R. B. Lewis , T. Anjum , C. Sternemann , L. Geelhaar , U. Pietsch
Titel

Transition from elastic to plastic strain release in core−shell nanowires revealed by in-plane x-ray diffraction

Source Nanotechnology , 32 , 205705 ( 2021 )
DOI : 10.1088/1361-6528/abe5db | 3244 Cite : Bibtex RIS
A. Al Hassan, W. A. Salehi, R. B. Lewis, T. Anjum, C. Sternemann, L. Geelhaar, and U. Pietsch

7 Autor L. Jaloustre , S. Le-Denmat , T. Auzelle , M. Azadmand , L. Geelhaar , F. Dahlem , R. Songmuang
Titel

Toward Quantitative Measurements of Piezoelectricity in III-N Semiconductor Nanowires

Source ACS Appl. Nano Mater. , 4 , 43 ( 2021 )
DOI : 10.1021/acsanm.0c02078 | arxiv: 1910.01187 | 3243 Cite : Bibtex RIS
L. Jaloustre, S. Le-Denmat, T. Auzelle, M. Azadmand, L. Geelhaar, F. Dahlem, and R. Songmuang

8 Autor J. Kamimura , M. Budde , P. Bogdanoff , C. Tschammer , F. F. Abdi , R. van de Krol , O. Bierwagen , H. Riechert , L. Geelhaar
Titel

Protection Mechanism against Photocorrosion of GaN Photoanodes Provided by NiO Thin Layers

Source Sol. RRL , 4 , 2000568 ( 2020 )
DOI : 10.1002/solr.202000568 | 3172 Cite : Bibtex RIS
J. Kamimura, M. Budde, P. Bogdanoff, C. Tschammer, F. F. Abdi, R. van de Krol, O. Bierwagen, H. Riechert, and L. Geelhaar

9 Autor 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
Titel

X-ray diffraction reveals the amount of strain and homogeneity of extremely bent single nanowires

Source J. Appl. Cryst. , 53 , 1310 ( 2020 )
DOI : 10.1107/S1600576720011516 | 3222 Cite : Bibtex RIS
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, and U. Pietsch

10 Autor Y. Zhao , Z. Xing , L. Geelhaar , J. Zhang , W. Yang , T. Auzelle , Y. Wu , L. Bian , S. Lu
Titel

Detaching highly flexible and transparent (In,Ga)N nanowire films by a low-cost and stable electrochemical procedure

Source ACS Appl. Nano Mater. , 3 , 9943 ( 2020 )
DOI : 10.1021/acsanm.0c01970 | 3202 Cite : Bibtex RIS
Y. Zhao, Z. Xing, L. Geelhaar, J. Zhang, W. Yang, T. Auzelle, Y. Wu, L. Bian, and S. Lu