Need

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College of Engineering and Science

Measurement of Complex Index of Refraction by Filmetrics

Report from a laboratory experiment conducted on 28 March 2013

as part of ELEN 533 OPTO-ELECTRONICS

GOUTHAM VIJAY CHODAPUNEEDI
Graduate Student

Date of Report: 25 April 2013
Abstract:

Filmetrics can calculate the complex index of refraction as a function of light wavelength from the light transmission and reflection measurement data. The thin films must be smooth and flat in order to measure reflectance and transmittance. In this laboratory experiment we will record the reflectance and transmittance of the light through a thin film semiconducting polymer Poly(3-hexylthiophene-2,5-diyl) (P3HT) doped with PCBM ( fullerene C61) used for optoelectronic applications (solar cells, for example). We will record the front panel with the display of the reflectance and transmittance measurement and the calculated n(λ) and ((λ) by the built in numerical method. We will also calculate ((λ) from the ((λ) and plot the graph for ((λ). From the ((λ) we will find the value of cut off wave length and find the energy band gap.

Table of Contents

Abstract: i
1. Introduction and Background 1
2. Theory 1
3. Description of Experimental Setup 2
4. List of Equipment Used 3
5. Procedure 3
6. Data and Data Analysis 4
9. Discussion of Results 40
8. Conclusions 40
9. References 41

Introduction and Background

Filmetrics are used to measure the the reflectance and transmittance of thin films. F10-RT filmetrics is used to measure the reflectance and transmittance of thin films. The thickness and refractive index of films can be also measured by including some software options. To measure the films they must be optically smooth and flat in…...

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