Electrical properties of Ir/n-InGaN/Ti/Al Schottky barrier diode in a wide temperature range

R. Padma, V. Rajagopal Reddy*

Department of Physics, Sri Venkateswara University, Tirupati 517 502, India  

Adv. Mater. Lett., 2014, 5 (1), pp 31-38

DOI: 10.5185/amlett.2013.6503

Publication Date (Web): Dec 28, 2013

E-mail: reddy_vrg@rediffmail.com


The temperature dependent current-voltage (I-V) and capacitance-voltage (C-V) characteristics of Ir/n-InGaN Schottky contacts have been investigated and analysed in the temperature range of 100-400 K. The estimated barrier heights and ideality factor of Ir/n-InGaN Schottky diode are 0.30 eV (I-V), 1.15 eV (C-V) and 3.05 at 100 K, and 0.94 eV (I-V), 0.97 eV (C-V) and 1.20 at 400 K respectively. The barrier height (Φb), ideality factor (n) and series resistance (RS) of Ir/n-InGaN Schottky diode are also evaluated using Cheung’s and Norde methods. Results show that the barrier heights (I-V) increase while ideality factor and series resistance decease with increasing temperature. Further, the discrepancy between Schottky barrier heights estimated from I-V and C-V measurements is also explained. It is observed that the interface state density Nss decreases with an increasing temperature. Experimental results showed that the conduction current is dominated by Poole-Frenkel emission in the temperature range from 100 K to 340 K and by Schottky emission above 340 K. The dominate conduction mechanism changed from Poole-Frenkel to Schottky emission in the temperature range from 340 K to 370 K. Finally, it is concluded that the temperature-dependent I–V characteristics of the Ir/n-InGaN Schottky diode can be successfully explained on the basis of thermionic emission (TE) mechanism.


Ir Schottky contact, n-type InGaN, Electrical characteristics, Schottky barrier heights, Series resistance, Poole-Frenkel and Schottky emissions.

Current Issue

Celebrating 10th Years of Diamond Open Access Publishing in Advanced Materials  

Cerebral Oxygenation Studies Through Near Infrared Spectroscopy: A Review

Analysis of Fine Sulfoaluminate Cement by Strength and Thermogravimetric Analysis

Characterization of the Interfacial Surface Energy for Composite Electrical Conduction Measurements using Two Full Range Percolation Threshold Models

Quantitative Detect of Fatigue of Membrane of Erythrocyte in Uniform Shear Field

Ecofriendly-developed Polyacrylic Acid-coated Magnetic Nanoparticles as Catalysts in Photo-fenton Processes

Evaluation of Drug Interactions with Medications Prescribed to Ambulatory Patients with Metabolic Syndrome in Urban Area

Fiber-reinforced Cementitious Composite: Sensitivity Analysis and Parameter Identification 

Evaluation of Drug Utilization Patterns Based on World Health Organization Drug use Indicators at Outpatients Clinics

Are Quantitatively Micro-machined Scaffolds Effective for Cell Technology?

Synthesis and Characterization of Gold Nanoparticles from Lobelia Nicotianifolia Leaf Extract and its Biological Activities

Advanced Oxidations of Tartrazine Azo-dye

Antifungal Activity of Salvia jordanii Against the Oral Thrush Caused by the Cosmopolitan Yeast Candida albicans among Elderly Diabetic Type 2 patients

Previous issues

Advanced Materials Congress Celebrating 10th Years of Establishment

Secure Management of Networked Batteries for Building Integrated Photovoltaics (BIPV) Systems  

The Cause of 100-year Low Carbonated Concrete of the Bridge 

Organic Montmorillonite Intercalated Nano-composites Prevent Post-Surgical Associated Infections

Morphology/tensile Performance Relationship for LLDPE/PP Double Gated Injected Blends

Preparation and Characterization of Nickel Ferrite Nanoparticles via Sol-gel Method

Nitrogen-doped Diamond Nanowire Gas Sensor for the Detection of Methane

Manufacture of Functional Open-cell Al Foams with Recycled Al Scraps using NaCl Ball Space Holder 

Vilsmeier-Haack Transformations under Non Classical Conditions

New Application of Highly Vesicular Basalt from Jabel Isbil Volcano (Dhamar-Rada'a Volcanic Field), Yemen

An Assessment of Tribological Characteristics under different Operating Condition

Functional Bi Coatings as A Perspective Material for Radiation Shields Production against Electron Radiation

Effects of Silica Modified NiFe2O4 on the Dielectric and Electrical Properties of NiFe2O4 filled Poly (methyl methacrylate) Composites

Upcoming Congress

Knowledge Experience at Sea TM