Air stable, photosensitive, phase pure iron pyrite nanocrystal thin films for photovoltaic application

Yu Bi, Yongbo Yuan, Christopher L. Exstrom, Scott A. Darveau, Jinsong Huang

Research output: Contribution to journalArticle

171 Citations (Scopus)

Abstract

Iron pyrite (FeS2) is a naturally abundant and nontoxic photovoltaic material that can potentially make devices as efficient as silicon-based ones; however existing iron pyrite photovoltaic devices contain thermodynamically unstable FeS2 film surfaces that lead to low open circuit voltages. We report the rational synthesis of phase pure, highly crystalline cubic FeS2 nanocrystals (NCs) using a trioctylphosphine oxide (TOPO) assisted hot-injection method. The synthesized pyrite NC films have excellent air stability over one year. In contrast, obvious surface decomposition was observed on the surface of FeS2 NCs synthesized without TOPO. A high carrier mobility of 80 cm2/(V s) and a strong photoconductivity were observed for the first time for pyrite films at room temperature. Our results indicate that TOPO passivates both iron and sulfur atoms on FeS2 NC surfaces, efficiently inhibiting surface decomposition.

Original languageEnglish (US)
Pages (from-to)4953-4957
Number of pages5
JournalNano Letters
Volume11
Issue number11
DOIs
StatePublished - Nov 9 2011

Fingerprint

Pyrites
pyrites
Nanocrystals
nanocrystals
iron
Thin films
air
thin films
Air
Oxides
oxides
Decomposition
decomposition
Carrier mobility
Photoconductivity
Silicon
Open circuit voltage
carrier mobility
open circuit voltage
Sulfur

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Air stable, photosensitive, phase pure iron pyrite nanocrystal thin films for photovoltaic application. / Bi, Yu; Yuan, Yongbo; Exstrom, Christopher L.; Darveau, Scott A.; Huang, Jinsong.

In: Nano Letters, Vol. 11, No. 11, 09.11.2011, p. 4953-4957.

Research output: Contribution to journalArticle

@article{49f37d31e3414c22acf2b166e4087886,
title = "Air stable, photosensitive, phase pure iron pyrite nanocrystal thin films for photovoltaic application",
abstract = "Iron pyrite (FeS2) is a naturally abundant and nontoxic photovoltaic material that can potentially make devices as efficient as silicon-based ones; however existing iron pyrite photovoltaic devices contain thermodynamically unstable FeS2 film surfaces that lead to low open circuit voltages. We report the rational synthesis of phase pure, highly crystalline cubic FeS2 nanocrystals (NCs) using a trioctylphosphine oxide (TOPO) assisted hot-injection method. The synthesized pyrite NC films have excellent air stability over one year. In contrast, obvious surface decomposition was observed on the surface of FeS2 NCs synthesized without TOPO. A high carrier mobility of 80 cm2/(V s) and a strong photoconductivity were observed for the first time for pyrite films at room temperature. Our results indicate that TOPO passivates both iron and sulfur atoms on FeS2 NC surfaces, efficiently inhibiting surface decomposition.",
author = "Yu Bi and Yongbo Yuan and Exstrom, {Christopher L.} and Darveau, {Scott A.} and Jinsong Huang",
year = "2011",
month = "11",
day = "9",
doi = "10.1021/nl202902z",
language = "English (US)",
volume = "11",
pages = "4953--4957",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "11",

}

TY - JOUR

T1 - Air stable, photosensitive, phase pure iron pyrite nanocrystal thin films for photovoltaic application

AU - Bi, Yu

AU - Yuan, Yongbo

AU - Exstrom, Christopher L.

AU - Darveau, Scott A.

AU - Huang, Jinsong

PY - 2011/11/9

Y1 - 2011/11/9

N2 - Iron pyrite (FeS2) is a naturally abundant and nontoxic photovoltaic material that can potentially make devices as efficient as silicon-based ones; however existing iron pyrite photovoltaic devices contain thermodynamically unstable FeS2 film surfaces that lead to low open circuit voltages. We report the rational synthesis of phase pure, highly crystalline cubic FeS2 nanocrystals (NCs) using a trioctylphosphine oxide (TOPO) assisted hot-injection method. The synthesized pyrite NC films have excellent air stability over one year. In contrast, obvious surface decomposition was observed on the surface of FeS2 NCs synthesized without TOPO. A high carrier mobility of 80 cm2/(V s) and a strong photoconductivity were observed for the first time for pyrite films at room temperature. Our results indicate that TOPO passivates both iron and sulfur atoms on FeS2 NC surfaces, efficiently inhibiting surface decomposition.

AB - Iron pyrite (FeS2) is a naturally abundant and nontoxic photovoltaic material that can potentially make devices as efficient as silicon-based ones; however existing iron pyrite photovoltaic devices contain thermodynamically unstable FeS2 film surfaces that lead to low open circuit voltages. We report the rational synthesis of phase pure, highly crystalline cubic FeS2 nanocrystals (NCs) using a trioctylphosphine oxide (TOPO) assisted hot-injection method. The synthesized pyrite NC films have excellent air stability over one year. In contrast, obvious surface decomposition was observed on the surface of FeS2 NCs synthesized without TOPO. A high carrier mobility of 80 cm2/(V s) and a strong photoconductivity were observed for the first time for pyrite films at room temperature. Our results indicate that TOPO passivates both iron and sulfur atoms on FeS2 NC surfaces, efficiently inhibiting surface decomposition.

UR - http://www.scopus.com/inward/record.url?scp=80755142769&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80755142769&partnerID=8YFLogxK

U2 - 10.1021/nl202902z

DO - 10.1021/nl202902z

M3 - Article

C2 - 21992489

AN - SCOPUS:80755142769

VL - 11

SP - 4953

EP - 4957

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 11

ER -