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  4. Untersuchung der elektrischen Eigenschaften breitlueckiger Halbleiterschichtstrukturen für optoelektronische Anwendungen
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-diss000000540

Untersuchung der elektrischen Eigenschaften breitlueckiger Halbleiterschichtstrukturen für optoelektronische Anwendungen

Veröffentlichungsdatum
1999-07-15
Autoren
Fehrer, Michael  
Betreuer
Hommel, D.  
Gutachter
Binder, J.  
Zusammenfassung
For electrical characterization, experimental setups for current-voltage-, capacitance-voltage- and theHall-effect-technique were installed and used to get an insight into the electrical behaviourand degradation of the grown devices. Parallel to the optimization of the growth of deviceswithin other PhD theses, the main focus of this work was the investigation of metallizationschemes for laser and light emitting diodes. Two complete different technological proceduresto contact laser diodes grown on different substrate materials have been developed. Thus itis possible to distinguish between technology- and epitaxy-relevant problems and thereforeto optimize these topics separately. As a result, laser diodes on GaAs- and ZnSe-substrateshave been demonstrated operating in continuous-wave excitation from several seconds up tothree minutes, which is the best result ever obtained at an university. In the field of the III-Vmaterial GaN, the main topic was to investigate the basic electrical properties of molecularbeam epitaxial grown layers. Temperature dependent Hall effect measurements have beenperformed at a new Hall experiment setup to extract parameters for growth optimization. Twodifferent charge transport models for layers grown with two different plasma sources for thenitrogen supply were adopted successfully from other material systems and depositiontechniques. The advantage of molecular beam epitaxy for obtaining p-type conductivity withMagnesium without post-growth annealing could be shown. Also the search for alternativedopands for GaN was heavily investigated in connection with another PhD-work at thisinstitute. The contact technology for all used investigation techniques and for future lightemitting devices was established.
Schlagwörter
ZnSe

; 

GaN

; 

optoelectronic devices

; 

laser diodes

; 

magnetotransport
Institution
Universität Bremen  
Fachbereich
Fachbereich 01: Physik/Elektrotechnik (FB 01)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Deutsch
Dateien
Lade...
Vorschaubild
Name

E-Diss54_Fehrer_M1999.pdf

Size

4.77 MB

Format

Adobe PDF

Checksum

(MD5):8519a397e0847c26de542c48e2c8f0f6

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