Multiexciton solar cells of CuInSe2 nanocrystals

C. Jackson Stolle, Taylor B. Harvey, Douglas R. Pernik, Jarett I. Hibbert, Jiang Du, Dong Joon Rhee, Vahid A. Akhavan, Richard D Schaller, Brian A. Korgel

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Peak external quantum efficiencies (EQEs) of just over 120% were observed in photovoltaic (PV) devices of CuInSe2 nanocrystals prepared with a photonic curing process. The extraction of more than one electron/hole pair as a result of the absorption of a single photon can occur if multiple excitons are generated and extracted. Multiexciton generation (MEG) in the nanocrystal films was substantiated by transient absorption spectroscopy. We propose that photonic curing leads to sufficient electronic coupling between nanocrystals to enable multiexciton extraction under typical solar illumination conditions. Under low light conditions, however, the EQE drops significantly, indicating that photonic curing-induced ligand desorption creates a significant amount of traps in the film that limit the overall power conversion efficiency of the device.

Original languageEnglish
Pages (from-to)304-309
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume5
Issue number2
DOIs
Publication statusPublished - Jan 16 2014

Fingerprint

curing
Nanocrystals
Photonics
Curing
Solar cells
nanocrystals
solar cells
photonics
Quantum efficiency
quantum efficiency
Absorption spectroscopy
Excitons
Conversion efficiency
Desorption
absorption spectroscopy
Photons
Lighting
desorption
illumination
Ligands

Keywords

  • CIGS
  • multiple excitons
  • nanocrystals
  • photonic curing
  • photovoltaics
  • solar cells

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Stolle, C. J., Harvey, T. B., Pernik, D. R., Hibbert, J. I., Du, J., Rhee, D. J., ... Korgel, B. A. (2014). Multiexciton solar cells of CuInSe2 nanocrystals. Journal of Physical Chemistry Letters, 5(2), 304-309. https://doi.org/10.1021/jz402596v

Multiexciton solar cells of CuInSe2 nanocrystals. / Stolle, C. Jackson; Harvey, Taylor B.; Pernik, Douglas R.; Hibbert, Jarett I.; Du, Jiang; Rhee, Dong Joon; Akhavan, Vahid A.; Schaller, Richard D; Korgel, Brian A.

In: Journal of Physical Chemistry Letters, Vol. 5, No. 2, 16.01.2014, p. 304-309.

Research output: Contribution to journalArticle

Stolle, CJ, Harvey, TB, Pernik, DR, Hibbert, JI, Du, J, Rhee, DJ, Akhavan, VA, Schaller, RD & Korgel, BA 2014, 'Multiexciton solar cells of CuInSe2 nanocrystals', Journal of Physical Chemistry Letters, vol. 5, no. 2, pp. 304-309. https://doi.org/10.1021/jz402596v
Stolle CJ, Harvey TB, Pernik DR, Hibbert JI, Du J, Rhee DJ et al. Multiexciton solar cells of CuInSe2 nanocrystals. Journal of Physical Chemistry Letters. 2014 Jan 16;5(2):304-309. https://doi.org/10.1021/jz402596v
Stolle, C. Jackson ; Harvey, Taylor B. ; Pernik, Douglas R. ; Hibbert, Jarett I. ; Du, Jiang ; Rhee, Dong Joon ; Akhavan, Vahid A. ; Schaller, Richard D ; Korgel, Brian A. / Multiexciton solar cells of CuInSe2 nanocrystals. In: Journal of Physical Chemistry Letters. 2014 ; Vol. 5, No. 2. pp. 304-309.
@article{58cfeabf62f241ad8784fabe9b5a7dd2,
title = "Multiexciton solar cells of CuInSe2 nanocrystals",
abstract = "Peak external quantum efficiencies (EQEs) of just over 120{\%} were observed in photovoltaic (PV) devices of CuInSe2 nanocrystals prepared with a photonic curing process. The extraction of more than one electron/hole pair as a result of the absorption of a single photon can occur if multiple excitons are generated and extracted. Multiexciton generation (MEG) in the nanocrystal films was substantiated by transient absorption spectroscopy. We propose that photonic curing leads to sufficient electronic coupling between nanocrystals to enable multiexciton extraction under typical solar illumination conditions. Under low light conditions, however, the EQE drops significantly, indicating that photonic curing-induced ligand desorption creates a significant amount of traps in the film that limit the overall power conversion efficiency of the device.",
keywords = "CIGS, multiple excitons, nanocrystals, photonic curing, photovoltaics, solar cells",
author = "Stolle, {C. Jackson} and Harvey, {Taylor B.} and Pernik, {Douglas R.} and Hibbert, {Jarett I.} and Jiang Du and Rhee, {Dong Joon} and Akhavan, {Vahid A.} and Schaller, {Richard D} and Korgel, {Brian A.}",
year = "2014",
month = "1",
day = "16",
doi = "10.1021/jz402596v",
language = "English",
volume = "5",
pages = "304--309",
journal = "Journal of Physical Chemistry Letters",
issn = "1948-7185",
publisher = "American Chemical Society",
number = "2",

}

TY - JOUR

T1 - Multiexciton solar cells of CuInSe2 nanocrystals

AU - Stolle, C. Jackson

AU - Harvey, Taylor B.

AU - Pernik, Douglas R.

AU - Hibbert, Jarett I.

AU - Du, Jiang

AU - Rhee, Dong Joon

AU - Akhavan, Vahid A.

AU - Schaller, Richard D

AU - Korgel, Brian A.

PY - 2014/1/16

Y1 - 2014/1/16

N2 - Peak external quantum efficiencies (EQEs) of just over 120% were observed in photovoltaic (PV) devices of CuInSe2 nanocrystals prepared with a photonic curing process. The extraction of more than one electron/hole pair as a result of the absorption of a single photon can occur if multiple excitons are generated and extracted. Multiexciton generation (MEG) in the nanocrystal films was substantiated by transient absorption spectroscopy. We propose that photonic curing leads to sufficient electronic coupling between nanocrystals to enable multiexciton extraction under typical solar illumination conditions. Under low light conditions, however, the EQE drops significantly, indicating that photonic curing-induced ligand desorption creates a significant amount of traps in the film that limit the overall power conversion efficiency of the device.

AB - Peak external quantum efficiencies (EQEs) of just over 120% were observed in photovoltaic (PV) devices of CuInSe2 nanocrystals prepared with a photonic curing process. The extraction of more than one electron/hole pair as a result of the absorption of a single photon can occur if multiple excitons are generated and extracted. Multiexciton generation (MEG) in the nanocrystal films was substantiated by transient absorption spectroscopy. We propose that photonic curing leads to sufficient electronic coupling between nanocrystals to enable multiexciton extraction under typical solar illumination conditions. Under low light conditions, however, the EQE drops significantly, indicating that photonic curing-induced ligand desorption creates a significant amount of traps in the film that limit the overall power conversion efficiency of the device.

KW - CIGS

KW - multiple excitons

KW - nanocrystals

KW - photonic curing

KW - photovoltaics

KW - solar cells

UR - http://www.scopus.com/inward/record.url?scp=84892741597&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892741597&partnerID=8YFLogxK

U2 - 10.1021/jz402596v

DO - 10.1021/jz402596v

M3 - Article

AN - SCOPUS:84892741597

VL - 5

SP - 304

EP - 309

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 2

ER -