CAN THO UNIVERSITY
COLLEGE OF ENGINEERING
FACULTY OF CHEMICAL ENGINEERING
SPECIALIZED SEMINAR
SEMICONDUCTOR MATERIALS AND ITS
POTENTIAL APPLICATIONS
GROUP 07
Instructor Assos. Prof. TRAN THI BICH QUYEN
:
Student’s name: VO MINH XUONG B2205852
HUYNH NHU Y B2205853
BUI THANH NHAN B2207179
Chemical Engineering High Quality K48
CONTENTS
1 INTRODUCTION
2 SYNTHESIZE METHODS OF SEMICONDUCTOR
3 APPLICATIONS
4 CONCLUSION
2
INTRODUCTION
3
REASONS FOR CHOOSING THE TOPIC
• New materials such as silicon
carbide and gallium nitride help
create devices that save energy,
reduce carbon emissions and
support sustainable technology.
• Give an overview of the future
development potential of
semiconductors.
https://www.vista.gov.vn/vi/news/xu-huong-nghien-cuu-cong-nghe/cong-nghe-ban-dan-7807.html 4
https://giaoducthoidai.vn/duc-loay-hoay-trong-moi-quan-he-voi-trung-quoc-post636977.html
INTRODUCTION
Concept
• A resistivity between 10-2 to 109 Ω·cm
• A bandgap between 0 and 4 eV
Classification
( Si ) ( GaAs )
Inorganic Semiconductors
• Elemental ( Si )
( ZnO )
• Binary compound ( GaAS )
( EuS )
• Oxide ( ZnO )
• Magnetic ( EuS )
5
https://www.linkedin.com/pulse/ralfs-gan-sic-news-april-18-2024-ralf-higgelke-wi0gf
INTRODUCTION
Organic Semiconductors
( P3HT ) ( Pentacene )
Conducting Polymers ( P3HT ) Small-molecule ( Pentacene )
6
https://copper-chemistry.fandom.com/wiki/Copper(I)_Oxide
SYNTHESIZE METHODS OF
SEMICONDUCTOR
7
SYNTHESIZE METHODS OF
SEMICONDUCTOR
Synthesize methods of silicon
Raw silicon HCL
(1kg baseline) (4 liters per kg of silicon)
Temperature range of 300OC to 350OC
Trichlorosilane (HSiCl3)
Fractional distillation
50 -100 mm Hg, 30 - 40oC for
Trichlorosilane purification
HSiCl3 crefining
Reduction with hydrogen (H2)
High-purity silicon 6 N
(99,9999%) pure silicon 8
Diagram of the Siemens silicon production process
SYNTHESIZE METHODS OF
SEMICONDUCTOR
Product obtained after the process
High purity silicon
9
https://aaitrade.com/high-purity-silicon
SYNTHESIZE METHODS OF
SEMICONDUCTOR
Synthesize methods of GaAs
GaCl3 C6H9N
Issolve under N2 atmosphere
Add As(NMe2)3 to the above mixture
Solution mixture
(GaCl3 + C6H9N + As(NMe2)3 )
Heat and reflux slowly to 167oC for 7 days
After 7 days, add 50 ml of petroleum spirit.
The solution forms a dark GaAs
precipitate
Centrifugation
GaAs nanoparticles
10
Diagram synthesis GaAs nanoparticles
SYNTHESIZE METHODS OF
SEMICONDUCTOR
Gallium nitride synthesize process by solvent thermal
Ga(C5H7O2)3 and NH4C2H3O2 in solven C6H6
(stir 50oC, 24h pH to 2 with HNO3)
Solution mixture
Heat the solution mixture at 240oC for 72 h
GaN particles have incomplete structure
Heating GaN at different temperatures
(400, 600, 800, 950oC)
GaN attains wurtzite structure at 950 oC, stable at high temperatures
Diagram of the solvothermal method using Gallium Acetylacetonate 11
SYNTHESIZE METHODS OF
SEMICONDUCTOR
Product obtained after the process
Scanning electron microscopy images of GaN calcined at 950°C: (a) 1 mm and (b) mapping .
12
A. Cruz-López, A. Manzo-Robledo, O. Vázquez-Cuchillo, R. Zanella, R. Gómez, J. Santoyo-Salazar, A. Campos-Badillo, Synthesis and characterization of gallium nitride nanoparticles by using
solvothermal-soft-chemical methodology, Materials Science in Semiconductor Processing 30 (2015) 435-441
SYNTHESIZE METHODS OF
SEMICONDUCTOR
Product obtained after the process
Obtained by HRTEM
(a) GaN global particle distribution; (b) XRD-SAED to GaN structure
(c) a detailed image from (a); (d) the lattice, with the planes
and directions (inset). 13
SYNTHESIZE METHODS OF
SEMICONDUCTOR
Advantages and disadvantages of synthesis methods
Synthesis Material Advantages Disadvantages Product Characteristics
Method
Complex, energy-
Silicon Produces high-purity silicon High purity, suitable for
Siemens intensive; high
HCl for electronics and solar semiconductors and solar
Method temperature requirements
H₂ cells;. cells.
increase costs.
(Ti(OBu)₄)
Forms thin, uniform
(Et₃Al) High reaction temperature;
Ziegler-Natta polyacetylene film; flexible High conductivity, thin film,
(C₂H₄) complex catalysts;
Catalyst and adjustable, doped for adaptable structure.
Br oxidation-prone.
conductivity.
I₂
Prolonged process,
Ga(C₅H₇O₂)₃ Enables large nano size, Semiconductor properties,
Solvent Thermal requires specialized
CH₃COONH₄ controlled and versatile high thermal and chemical
Method equipment and strict
Solvents process. stability, optical properties.
safety.
14
APPLICATIONS
15
APPLICATIONS
1 Light Emitting Diodes (LEDs)
2 Thin-Film Solar Energy Technology
3 Gallium Nitride in lasers
4 Glucose Sensors
16
APPLICATIONS
Light Emitting Diodes (LEDs)
• Gallium Nitride (GaN) LEDs
revolutionized
• GaN has become vital in the Gallium Nitride (GaN)
LEDs industry, with continuedd
advancements as eco-friendly
lighting demand rises.
https://caothienphat.com/tim-hieu-ve-cong-nghe-led-light-emitting-diode/
17
https://www.wwmeteorites.com/gallium
APPLICATIONS
Thin-Film Solar Energy Technology
• Zinc Oxide (ZnO) in solar energy technology,
especially for thin-film solar cells
• Superior Properties
• Lightweight and Flexible
• Cost-Effective Production ZnO
• Enhanced Efficiency
• Protection and Stability
https://mbcsolar.com/ 18
https://www.zinsa.com/en/blog/zinc-oxide-applications-uses/
APPLICATIONS
GaN in lasers
• GaN is widely used in semiconductor
lasers for stable, efficient light emission
from ultraviolet to visible wavelengths,
supporting applications in
communications and bioimaging.
Y. Chen, J. Liu, K. Liu, J. Si, Y. Ding, L. Li, T. Lv, J. Liu, L. Fu, GaN in different 19
dimensionalities: Properties, synthesis, and applications, Materials Science and
Engineering: R: Reports 138 (2019)
APPLICATIONS
Glucose Sensors
Continuous glucose monitoring
without fingersticks, data sent to
phones, small sensors, compatible
with insulin pumps. Schematic illustration of experiment setup
for measuring glucose with the sensor
Y. Yoon, G.S. Lee, K. Yoo, J.-B. Lee, Fabrication of a microneedle/CNT hierarchical micro/nano surface
20
electrochemical sensor and its in-vitro glucose sensing characterization, Sensors 13(12) (2013) 16672-
16681
CONCLUSION
21
CONCLUSION
Potential of semiconductors
Essential components in modern electronic devices (processors,
data storage, sensors).
Applications in technology and connectivity
Support high-speed data transmission for 5G networks and IoT.
Promising future across diverse fields
Play a critical role in shaping the future of various industries.
22
THANK YOU FOR LISTENING!
