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Questions related from Gyanendra Bhattarai
In UV-VIS analysis of a thin film, suppose we measure Reflectance and absorbance. Absorbance sometimes can be different in meaning. Some instruments include the reflectance in the absorbance, and...
16 April 2021 3,687 3 View
Suppose a chemist performing thin film deposition used 10 sccm of water vapor during the process. Now, he needs to calculate how many grams of water he used per minute. By definition, sccm is...
07 August 2020 9,461 0 View
I am dealing with both type of amplifiers 1. Integrator (chrage sensetive amplifier) and 2. Transimpedance amplifier (current sensative). Ideal case of these two amplifiers are completely...
27 July 2016 1,503 16 View
I am dealing with amorphous semiconductor films (thickness of the orders of 1-2 microns). A true TOF experiment (where the pulsed light creates a thin sheet of e-h pairs) is difficult because the...
15 February 2016 7,328 2 View
In the derivation of Poole-Frenkel emission (Field assisted thermal emission), the trap barrier is lowered due to applied field and is given as Delta U = sqrt((e^3/ pi*\epsilon)*E) where E is...
07 December 2015 897 2 View
I am searching for a text book with theoretical derivations of different types of conduction mechanism in insulators like Schottky emission, thermionic emission, poole-frenkel emission, Hopping...
22 November 2015 2,735 4 View
Trying to obtain absorption coefficient from absorbance data. (HP 8453 Spectrometer). When a UV-VIS spectrometer measures absorbance as A = log10(I0/I) how does it determine that the loss in the...
03 June 2015 6,352 5 View
Suppose that e-h pairs are generated on anode surface of an insulator by surface absorption of light. some of the electrons recombine there in surface very shortly. The remaining electrons are...
19 February 2015 2,467 3 View
I am measuring capacitance of a capacitor. The open compensation and short compensation is straightforward. But I am not being able to perform/understand the load compensation. I really do not...
20 July 2014 7,931 1 View
I am measuring impedance data with Agilent Analyzer 4294A with a custom built fixture. After performing both open and short fixture compensation, when I measure the impedance between open...
21 April 2014 4,753 7 View