Physics

Home > COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering > Volume 29 issue 6 > Experimental validation of a numerical multiphysics... ... Icon: Abstract. Icon: Backfiles. Icon: Print. Icon: Reprints & permissions.

ABSTRACT The Ag/PTCDA/PEDOT:PSS/p-Si Schottky diode has been fabricated by adding a layer of organic compound 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) on top of the p-Si for which the junction characteristics have been investigated. The electronic properties of the device have been studied by the conventional I–V and the Norde's methods. For conventional I–V measurements the rectifying behavior has been observed with a rectification ratio of 236. The barrier height and ideality factor values of 0.81 eV and 3.5, respectively, for the structure have been obtained from the forward bias I–V characteristics. Various electrical parameters such as reverse saturation current, series resistance and shunt resistance have been calculated from the analysis of experimental I–V results and discussed in detail. The barrier height and the series resistance determined by the Norde's function are found in good agreement with the values calculated from conventional I–V measurements. The charge conduction mechanism has also been discussed.

LIDAR operates by transmitting light pulses of few nanoseconds width into the atmosphere and receiving signals backscattered from different layers of aerosols and clouds from the atmosphere to derive vertical profiles of the physical and optical properties with good spatial resolution. The Data Acquisition System (DAS) of the LIDAR has to handle signals of wide dynamic range (of the order

This paper discusses the various requirements of data acquisition and processing for Space Borne Lidar (Light Detection and Ranging) system being developed in Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum for the study of aerosols and clouds in the troposphere and lower stratosphere (0-40 km). The lidar system will be housed in a polar orbiting satellite at an altitude