Growth and analysis of blue LEDs comprising quaternary AllnGaN:
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| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2015
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | IX, 168 S. Ill., graph. Darst. |
Internformat
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Datensatz im Suchindex
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| adam_text | ULM UNIVERSITY UNIVERSITAT I
UULM
GROWTH AND ANALYSIS OF BLUE LEDS
COMPRISING QUATERNARY ALLNGAN
DISSERTATION
ZUR ERLANGUNG
DES AKADEMISCHEN GRADES EINES
DOKTOR-INGENIEURS
(DR.-LNG.)
DER FAKULTAT FUR INGENIEURWISSENSCHAFTEN
UND INFORMATIK DER UNIVERSITAT ULM
VON
JAN-PHILIPP GREGOR AHL
AUS DUSSELDORF
GUTACHTER: PROF. DR. RER. NAT. FERDINAND SCHOLZ
PROF. DR. RER. NAT. ULRICH SCHWARZ
AMTIERENDE DEKANIN: PROF. DR. PHIL. TINA SEUFERT
ULM, 22. JUNI 2015
HTTP://D-NB.INFO/1081318260
CONTENTS
INTRODUCTION 1
1 FUNDAMENTALS 5
1.1 THE ALINGAN MATERIAL SYSTEM 5
1.1.1 CRYSTAL STRUCTURE 5
1.1.2 MISCIBILITY GAP 7
1.1.3 STRAIN 9
1.1.4 POLARIZATION 9
1.1.5 BAND STRUCTURE AND BANDGAP 10
1.1.6 ELECTRON-HOLE RECOMBINATION PROCESSES 12
1.2 ALINGAN BASED LIGHT-EMITTING DIODES (LEDS) . 14
1.3 MOTIVATION FOR ALINGAN AND INGAN AS BARRIER MATERIALS .... 18
1.3.1 POLARIZATION ENGINEERING 18
1.3.2 CHARGE CARRIER DISTRIBUTION IN MQW 21
1.4 METAL ORGANIC VAPOR PHASE EPITAXY (MOVPE) 22
1.4.1 BASICS OF CRYSTAL GROWTH AND EPITAXY 22
1.4.2 BASICS OF ALINGAN MOVPE 25
1.4.3 LITERATURE REVIEW OF ALINGAN MOVPE 25
1.5 CHARACTERIZATION TECHNIQUES 28
1.5.1 RUTHERFORD BACKSCATTERING SPECTROMETRY (RBS) 28
1.5.2 X-RAY PHOTOELECTRON SPECTROSCOPY (XPS) 30
1.5.3 ATOM PROBE TOMOGRAPHY (APT) 31
1.5.4 SCANNING TRANSMISSION ELECTRON MICROSCOPY (STEM) . . 33
1.5.5 X-RAY DIFFRACTION (XRD) 33
1.5.6 ATOMIC FORCE MICROSCOPY (AFM) 34
1.5.7 ELECTROLUMINESCENCE (EL), PHOTOLUMINESCENCE (PL) AND
ABSORPTION MEASUREMENTS 34
VII
I:
S
CONTENTS
2 ALLNGAN GROWTH BY MOVPE AND STRUCTURAL CHARACTERIZATION 37
2.1 EPITAXIAL STRUCTURES AND EXPERIMENTAL PROCEDURE 37
2.2 OPTIMIZATION OF MOVPE PROCESS PARAMETERS 38
2.2.1 STARTING POINT FOR ALLNGAN MOVPE DEVELOPMENT ... 39
2.2.2 MOVPE OPTIMIZATION 44
2.3 ALLNGAN COMPOSITION: MEASUREMENT AND GROWTH PARAMETERS . 48
2.3.1 (TM)ALUMINUM SERIES 49
2.3.2 TEMPERATURE SERIES (INDIUM SERIES) 54
2.4 MATERIAL HOMOGENEITY AND DEFECTS 55
2.4.1 ALLNGAN HOMOGENEITY 56
2.4.2 CRYSTAL DEFECTS 62
2.5 MORPHOLOGY AND GROWTH MECHANISM 64
2.5.1 (TM)ALUMINUM SERIES 64
2.5.2 STRAIN DEPENDENCE 66
2.5.3 TEMPERATURE AND GROWTH RATE DEPENDENCE 67
2.5.4 MODEL FOR ALLNGAN GROWTH 71
2.5.5 IMPLICATIONS FOR QUANTUM WELL OPERATION IN LEDS .... 72
2.6 SUMMARY OF CHAPTER 2 73
3 OPTOELECTRONIC AND OPTICAL PROPERTIES OF ALLNGAN 75
3.1 OPTOELECTRONIC PROPERTIES OF ALLNGAN QWS 75
3.1.1 MOTIVATION 75
3.1.2 SAMPLES 77
3.1.3 MQW ELECTROLUMINESCENCE DATA 82
3.1.4 SQW ELECTROLUMINESCENCE DATA 84
3.1.5 ABC-ANALYSIS OF SQW DATA 85
3.1.6 DISCUSSION OF C 93
3.1.7 DISCUSSION OF B 96
3.1.8 DISCUSSION OF A 97
3.2 BANDGAP OF ALLNGAN 99
3.2.1 SAMPLES AND EXPERIMENTAL PROCEDURE 100
3.2.2 BANDGAP 102
3.2.3 BANDGAP CONTOURS AND POLARIZATION CONTOURS 105
3.2.4 COMPOSITION AND BANDGAP MEASUREMENTS 107
3.2.5 COMPARISON TO EXPERIMENTAL BANDGAP VALUES IN THE LIT
ERATURE 109
3.3 SUMMARY OF CHAPTER 3 ILL
VIII
CONTENTS
4 ALLNGAN AND INGAN BARRIERS IN BLUE LEDS 115
4.1 ALLNGAN AND INGAN BARRIERS 115
4.1.1 SAMPLES 115
4.1.2 EXPERIMENTAL DATA 116
4.2 INGAN-GAN-INGAN BARRIERS 121
4.2.1 MOTIVATION 121
4.2.2 SAMPLES 121
4.2.3 EXPERIMENTAL DATA AND COMPARISON TO SIMULATIONS . . . 123
4.3 SUMMARY OF CHAPTER 4 126
SUMMARY 128
ACKNOWLEDGMENT 133
PUBLICATIONS AND CONFERENCE CONTRIBUTIONS 137
LIST OF TABLES 140
LIST OF FIGURES 141
REFERENCES 146
IX
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| any_adam_object | 1 |
| author | Ahl, Jan-Philipp Gregor 1986- |
| author_GND | (DE-588)1076514197 |
| author_facet | Ahl, Jan-Philipp Gregor 1986- |
| author_role | aut |
| author_sort | Ahl, Jan-Philipp Gregor 1986- |
| author_variant | j p g a jpg jpga |
| building | Verbundindex |
| bvnumber | BV042873543 |
| classification_rvk | ZN 5040 |
| ctrlnum | (OCoLC)945576497 (DE-599)BSZ445382600 |
| dewey-full | 621.381522 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.381522 |
| dewey-search | 621.381522 |
| dewey-sort | 3621.381522 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Elektrotechnik / Elektronik / Nachrichtentechnik |
| format | Thesis Book |
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| indexdate | 2024-07-10T07:11:49Z |
| institution | BVB |
| language | English |
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| physical | IX, 168 S. Ill., graph. Darst. |
| publishDate | 2015 |
| publishDateSearch | 2015 |
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| spelling | Ahl, Jan-Philipp Gregor 1986- Verfasser (DE-588)1076514197 aut Growth and analysis of blue LEDs comprising quaternary AllnGaN von Jan-Philipp Gregor Ahl 2015 IX, 168 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Ulm, Univ., Diss., 2015 Light emitting diodes Gallium nitride Epitaxy Galliumnitrid (DE-588)4375592-6 gnd rswk-swf Lumineszenzdiode (DE-588)4125154-4 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Lumineszenzdiode (DE-588)4125154-4 s Galliumnitrid (DE-588)4375592-6 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028302606&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Ahl, Jan-Philipp Gregor 1986- Growth and analysis of blue LEDs comprising quaternary AllnGaN Light emitting diodes Gallium nitride Epitaxy Galliumnitrid (DE-588)4375592-6 gnd Lumineszenzdiode (DE-588)4125154-4 gnd |
| subject_GND | (DE-588)4375592-6 (DE-588)4125154-4 (DE-588)4113937-9 |
| title | Growth and analysis of blue LEDs comprising quaternary AllnGaN |
| title_auth | Growth and analysis of blue LEDs comprising quaternary AllnGaN |
| title_exact_search | Growth and analysis of blue LEDs comprising quaternary AllnGaN |
| title_full | Growth and analysis of blue LEDs comprising quaternary AllnGaN von Jan-Philipp Gregor Ahl |
| title_fullStr | Growth and analysis of blue LEDs comprising quaternary AllnGaN von Jan-Philipp Gregor Ahl |
| title_full_unstemmed | Growth and analysis of blue LEDs comprising quaternary AllnGaN von Jan-Philipp Gregor Ahl |
| title_short | Growth and analysis of blue LEDs comprising quaternary AllnGaN |
| title_sort | growth and analysis of blue leds comprising quaternary allngan |
| topic | Light emitting diodes Gallium nitride Epitaxy Galliumnitrid (DE-588)4375592-6 gnd Lumineszenzdiode (DE-588)4125154-4 gnd |
| topic_facet | Light emitting diodes Gallium nitride Epitaxy Galliumnitrid Lumineszenzdiode Hochschulschrift |
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