Investigation of Cu2ZnSnS4 nanoparticles for thin-film solar cell applications

Sara Lena Josefin Engberg, Karsten Agersted, Andrea Crovetto, Ole Hansen, Yeng Ming Lam, Jørgen Schou

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We study the effect of the annealing atmosphere on grain growth of ligand-free and ligand-coated Cu2ZnSnS4 (CZTS) nanoparticle-based thin films by thermal analysis. We use thermogravimetric analysis (TGA) coupled with mass spectrometry (MS) to simultaneously monitor mass changes and evolved gases of both nanoparticle powders and inks. The investigation focuses on annealing in air, nitrogen and forming gas (5% H2 in Ar), i.e., oxidizing, inert, and reducing atmospheres. We find that the oleylamine capping ligands thermally decompose into smaller organic fragments starting below its boiling point, with a slightly higher decomposition rate in reducing atmosphere. With nanoparticle inks, very modest grain growth is observed, with no differences between the atmospheres. Conversely, with nanoparticle powders, micron-sized grains appear all over for the ligand-free sample and some micron-sized grains are seen with inert atmosphere for the ligand-coated powder. The starting material is thus very important for grain growth.
Original languageEnglish
JournalThin solid Films
Volume628
Pages (from-to)163-169
Number of pages7
ISSN0040-6090
DOIs
Publication statusPublished - 2017

Keywords

  • CZTS nanoparticle
  • Ligands
  • Thermogravimetry

Cite this

@article{0b331f72737b4f72b2d6647a533500f1,
title = "Investigation of Cu2ZnSnS4 nanoparticles for thin-film solar cell applications",
abstract = "We study the effect of the annealing atmosphere on grain growth of ligand-free and ligand-coated Cu2ZnSnS4 (CZTS) nanoparticle-based thin films by thermal analysis. We use thermogravimetric analysis (TGA) coupled with mass spectrometry (MS) to simultaneously monitor mass changes and evolved gases of both nanoparticle powders and inks. The investigation focuses on annealing in air, nitrogen and forming gas (5{\%} H2 in Ar), i.e., oxidizing, inert, and reducing atmospheres. We find that the oleylamine capping ligands thermally decompose into smaller organic fragments starting below its boiling point, with a slightly higher decomposition rate in reducing atmosphere. With nanoparticle inks, very modest grain growth is observed, with no differences between the atmospheres. Conversely, with nanoparticle powders, micron-sized grains appear all over for the ligand-free sample and some micron-sized grains are seen with inert atmosphere for the ligand-coated powder. The starting material is thus very important for grain growth.",
keywords = "CZTS nanoparticle, Ligands, Thermogravimetry",
author = "Engberg, {Sara Lena Josefin} and Karsten Agersted and Andrea Crovetto and Ole Hansen and Lam, {Yeng Ming} and J{\o}rgen Schou",
year = "2017",
doi = "10.1016/j.tsf.2017.03.003",
language = "English",
volume = "628",
pages = "163--169",
journal = "Thin Solid Films",
issn = "0040-6090",
publisher = "Elsevier",

}

Investigation of Cu2ZnSnS4 nanoparticles for thin-film solar cell applications. / Engberg, Sara Lena Josefin; Agersted, Karsten; Crovetto, Andrea; Hansen, Ole; Lam, Yeng Ming; Schou, Jørgen.

In: Thin solid Films, Vol. 628, 2017, p. 163-169.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Investigation of Cu2ZnSnS4 nanoparticles for thin-film solar cell applications

AU - Engberg, Sara Lena Josefin

AU - Agersted, Karsten

AU - Crovetto, Andrea

AU - Hansen, Ole

AU - Lam, Yeng Ming

AU - Schou, Jørgen

PY - 2017

Y1 - 2017

N2 - We study the effect of the annealing atmosphere on grain growth of ligand-free and ligand-coated Cu2ZnSnS4 (CZTS) nanoparticle-based thin films by thermal analysis. We use thermogravimetric analysis (TGA) coupled with mass spectrometry (MS) to simultaneously monitor mass changes and evolved gases of both nanoparticle powders and inks. The investigation focuses on annealing in air, nitrogen and forming gas (5% H2 in Ar), i.e., oxidizing, inert, and reducing atmospheres. We find that the oleylamine capping ligands thermally decompose into smaller organic fragments starting below its boiling point, with a slightly higher decomposition rate in reducing atmosphere. With nanoparticle inks, very modest grain growth is observed, with no differences between the atmospheres. Conversely, with nanoparticle powders, micron-sized grains appear all over for the ligand-free sample and some micron-sized grains are seen with inert atmosphere for the ligand-coated powder. The starting material is thus very important for grain growth.

AB - We study the effect of the annealing atmosphere on grain growth of ligand-free and ligand-coated Cu2ZnSnS4 (CZTS) nanoparticle-based thin films by thermal analysis. We use thermogravimetric analysis (TGA) coupled with mass spectrometry (MS) to simultaneously monitor mass changes and evolved gases of both nanoparticle powders and inks. The investigation focuses on annealing in air, nitrogen and forming gas (5% H2 in Ar), i.e., oxidizing, inert, and reducing atmospheres. We find that the oleylamine capping ligands thermally decompose into smaller organic fragments starting below its boiling point, with a slightly higher decomposition rate in reducing atmosphere. With nanoparticle inks, very modest grain growth is observed, with no differences between the atmospheres. Conversely, with nanoparticle powders, micron-sized grains appear all over for the ligand-free sample and some micron-sized grains are seen with inert atmosphere for the ligand-coated powder. The starting material is thus very important for grain growth.

KW - CZTS nanoparticle

KW - Ligands

KW - Thermogravimetry

U2 - 10.1016/j.tsf.2017.03.003

DO - 10.1016/j.tsf.2017.03.003

M3 - Journal article

VL - 628

SP - 163

EP - 169

JO - Thin Solid Films

JF - Thin Solid Films

SN - 0040-6090

ER -