CONSTRUCTION OF SnO2/SiO2/Si HETEROJUNCTION AND ITS LINEUP USING I–V AND C–V MEASUREMENTS

2011 ◽  
Vol 25 (29) ◽  
pp. 3863-3869 ◽  
Author(s):  
EVAN T. SALEM ◽  
IBRAHIM R. AGOOL ◽  
MARWA A. HASSAN

Near-ideal n- SnO 2/n- Si heterojunction band edge lineup has been investigated with aid of I–V and C–V measurements. The heterojunction was manufactured by rapid thermal oxidation of Sn metal films prepared by thermal evaporation technique on monocrystalline n-type silicon. The experimental data of the conduction band offset ΔEc and valence band offset ΔEc were compared with theoretical values. The band offset ΔEc = 0.55 eV and ΔEv = 1.8 eV obtained at 300 K. The energy band diagram of n- SnO 2/n- Si HJ was constructed. C–V measurements depict that the junction was an abrupt type and the built-in voltage was determined from 1/C2–V plot.

2006 ◽  
Vol 20 (28) ◽  
pp. 1833-1838 ◽  
Author(s):  
RAID A. ISMAIL ◽  
ABDUL-MAJEED E. AL-SAMARAI ◽  
OMAR A. ABDULRAZAQ

Near-ideal p-CdS/n-Si heterojunction (HJ) band edge lineup has been investigated for the first time with the aid of I–V and C–V measurements. The heterojunction was obtained by the deposition of CdS films prepared by chemical spray pyrolysis technique (CSP), on the monocrystalline n-type silicon. The experimental data of the conduction band offset, ΔEc and the valence band offset, ΔEc were compared with theoretical values. The band offsets ΔEc=530 meV and ΔEv=770 meV were obtained at 300 K. The energy band diagram of p-CdS/n-Si HJ was constructed. The C–V measurements depicted that the junction was an abrupt type and the built-in voltage was determined from the C-2–V plot.


2006 ◽  
Vol 3 (3) ◽  
pp. 534-539
Author(s):  
Baghdad Science Journal

Optical detector was manufactured Bashaddam thermal evaporation technique at room temperature under pressure rays studied characteristics of reactive Scout efficiency quantitative ratio of the signal and the ability equivalent to noise


2011 ◽  
Vol 8 (2) ◽  
pp. 581-587
Author(s):  
Baghdad Science Journal

Crystalline In2O3 Thin films have been prepared by flash evaporation. We have studied the crystal structure of as deposited at 303K and annealed at 523K using X-ray diffraction. The Hall Effect measurements confirmed that electrons were predominant charges in the conduction process (i.e n-type).It is found that the absorption coefficient of the prepared films decreases with increasing Ta. The d.c conductivity study showed that the conductivity increase with increasing Ta , whereas the activation energy decreases with increasing Ta. Also we study the barrier tunneling diode for In2O3/Si heterostructure grown by Flash evaporation technique. (capacitance-voltage C-V) spectroscopy measurements were performed at 303 K and at the annealing temperature 523K. The built in voltage has been determined and it depends strongly on the annealing process of the heterojunction. From all above measurements we assumed an energy band diagram for In2O3 /Si(P-type) heterojunction.


2020 ◽  
Vol 21 (1) ◽  
pp. 8
Author(s):  
Emy Mulyani ◽  
Tjipto Sujitno ◽  
Dessy Purbandari ◽  
Ferdiansjah Ferdiansjah ◽  
Sayono Sayono

This paper presents the research on the growth of ZnS:Ag:Cu thin film on a glass substrate as a radio-luminescent material. The SRIM/TRIM software is used to determine the optimum thickness based on an energy deposition depth of 5.485 MeV Am 241 alpha radiation source on ZnS:Ag:Cu material. To increase the adhesive strength of the coating, initially, the glass substrate is etched using a plasma glow discharged at 280°C for 15 minutes. Multiple coatings of ZnS:Ag:Cu were  etched on the glass substrate; this was carried out using a thermal evaporation technique to achieve the optimal thickness (based on SRIM/TRIM simulation). The thin film thickness was observed using a scanning electron microscope (SEM). The optical properties of the un-etched, etched glass substrate and thin-film were characterized using UV-Vis spectrometer. Based on SRIM/TRIM simulation, the optimal thickness is 22 mm which can be achieved by coating three times. From optical properties of ZnS:Ag:Cu thin film and after being analysed using Taue plot method, it is found that the energy gap of ZnS:Ag:Cu thin film is 2.48 eV. It can be concluded that the addition of Ag and Cu doped decrease the energy gap of ZnS (3.66 eV).


Vacuum ◽  
2020 ◽  
Vol 176 ◽  
pp. 109167
Author(s):  
Sina Rouhi ◽  
Jose Enrique Martinez-Medina ◽  
Mehtap Ozdemir ◽  
Mehmet Ertugrul ◽  
Gulnur Aygun ◽  
...  

2019 ◽  
Vol 693 (1) ◽  
pp. 66-75
Author(s):  
Fatin Farisha Alia Azmi ◽  
Saifful Kamaluddin Muzakir ◽  
Mohd Fakhrul Zamani Kadir ◽  
Shujahadeen B. Aziz

Sign in / Sign up

Export Citation Format

Share Document