NDLI: Annealing of FeS nano-crystal thin film

Content Provider	IEEE Xplore Digital Library
Author	Dhakal, T.P. Ganta, L.K. Vanhart, D. Westgate, C.R.
Copyright Year	2012
Description	Author affiliation: Center for Autonomous Solar Power, State University of New York - Binghamton University, 13902, USA (Dhakal, T.P.; Ganta, L.K.; Vanhart, D.; Westgate, C.R.)
Abstract	With a band gap of 0.95 eV and high absorption coefficient $(∼10^{5}$ $cm^{−1}),$ FeS is ideal for use as a p-type heterojunction partner in a solar cell. Although pyrite is abundant in nature, getting the right phase for thin films is difficult due to the various phases of iron sulfides. We propose an ink based process for attaining the pyrite phase. Our experimental process involves use of low cost non-toxic chemicals for synthesis. The process involves reacting iron (II) chloride and sulphur complexes made with solvents like oleylamine, octadecylamine and diphenyl ether. The reaction provides perfect nano crystals dispersed in a carbon based solution which is later subjected to centrifugation to separate the crystals. After multiple cleaning cycles, the crystals were dispersed in chloroform for uniform suspension. SEM image of the film formed by drop casting revealed that the nanocrystals were perfect cubes. EDX analysis showed the iron to sulfur atomic percentage ratio 1∶1. The nano-crystal films were annealed at temperatures from 400°C to 600°C. The organic residues were removed after annealing but the film annealed at 600°C converted into FeS and consisted of amorphous region. A detail analysis of the films using SEM/EDX/XRD/FTIR/Raman is presented in this article.
Starting Page	000170
Ending Page	000173
File Size	1575800
Page Count	4
File Format	PDF
ISBN	9781467300643
ISSN	01608371
e-ISBN	9781467300667
DOI	10.1109/PVSC.2012.6317593
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Films Annealing Iron Nanocrystals Photovoltaic cells Scanning electron microscopy Crystals annealing study iron pyrite nanocrystals thin film solar cell
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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