Enhanced sunlight harvesting of dye-sensitized solar cells assisted with long persistent phosphor materials

Weizhen He, Timur Sh Atabaev, Hyung Kook Kim, Yoon Hwae Hwang

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

TiO2 nanoparticle-based dye-sensitized solar cells (DSSCs) were modified by depositing a layer of a long-persistent phosphor, SrAl 2O4:Eu2+,Dy3+, on top of the TiO2 nanoparticle layer to prepare working electrodes of the DSSCs. SrAl2O4:Eu2+,Dy3+ red-shifted the short UV wavelengths into the main absorption range of the dye commonly used in DSSCs. The SrAl2O4:Eu2+,Dy3+ layer also acted as a light-scattering layer to reduce the loss of visible light. Incident photon to current conversion efficiency measurements showed that the application of such phosphor materials enhanced light-harvesting. The open-circuit voltage was found to be higher in the modified DSSCs. The electrons produced by the SrAl2O4:Eu2+,Dy3+ particles contribute to the reduction of I3 - to I -, leading to a lower I3 - concentration in the electrolyte. This reduces the recapture of electrons injected in the conduction band of TiO2 by triiodide ions and promotes the open circuit voltage. The performance of the modified DSSC device was improved compared with the cell using a working electrode without this phosphor layer. An overall 13% improvement in conversion efficiency of modified DSSCs was achieved due to the presence of the phosphor layer.

Original languageEnglish
Pages (from-to)17894-17900
Number of pages7
JournalJournal of Physical Chemistry C
Volume117
Issue number35
DOIs
Publication statusPublished - Sep 5 2013
Externally publishedYes

Fingerprint

sunlight
Phosphors
phosphors
solar cells
dyes
Open circuit voltage
Conversion efficiency
open circuit voltage
Nanoparticles
Electrodes
Electrons
nanoparticles
Conduction bands
electrodes
Light scattering
Electrolytes
Dye-sensitized solar cells
Coloring Agents
Photons
Dyes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Enhanced sunlight harvesting of dye-sensitized solar cells assisted with long persistent phosphor materials. / He, Weizhen; Atabaev, Timur Sh; Kim, Hyung Kook; Hwang, Yoon Hwae.

In: Journal of Physical Chemistry C, Vol. 117, No. 35, 05.09.2013, p. 17894-17900.

Research output: Contribution to journalArticle

@article{790fe631c4c84b7cac3a71451d1e1f04,
title = "Enhanced sunlight harvesting of dye-sensitized solar cells assisted with long persistent phosphor materials",
abstract = "TiO2 nanoparticle-based dye-sensitized solar cells (DSSCs) were modified by depositing a layer of a long-persistent phosphor, SrAl 2O4:Eu2+,Dy3+, on top of the TiO2 nanoparticle layer to prepare working electrodes of the DSSCs. SrAl2O4:Eu2+,Dy3+ red-shifted the short UV wavelengths into the main absorption range of the dye commonly used in DSSCs. The SrAl2O4:Eu2+,Dy3+ layer also acted as a light-scattering layer to reduce the loss of visible light. Incident photon to current conversion efficiency measurements showed that the application of such phosphor materials enhanced light-harvesting. The open-circuit voltage was found to be higher in the modified DSSCs. The electrons produced by the SrAl2O4:Eu2+,Dy3+ particles contribute to the reduction of I3 - to I -, leading to a lower I3 - concentration in the electrolyte. This reduces the recapture of electrons injected in the conduction band of TiO2 by triiodide ions and promotes the open circuit voltage. The performance of the modified DSSC device was improved compared with the cell using a working electrode without this phosphor layer. An overall 13{\%} improvement in conversion efficiency of modified DSSCs was achieved due to the presence of the phosphor layer.",
author = "Weizhen He and Atabaev, {Timur Sh} and Kim, {Hyung Kook} and Hwang, {Yoon Hwae}",
year = "2013",
month = "9",
day = "5",
doi = "10.1021/jp307954n",
language = "English",
volume = "117",
pages = "17894--17900",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "35",

}

TY - JOUR

T1 - Enhanced sunlight harvesting of dye-sensitized solar cells assisted with long persistent phosphor materials

AU - He, Weizhen

AU - Atabaev, Timur Sh

AU - Kim, Hyung Kook

AU - Hwang, Yoon Hwae

PY - 2013/9/5

Y1 - 2013/9/5

N2 - TiO2 nanoparticle-based dye-sensitized solar cells (DSSCs) were modified by depositing a layer of a long-persistent phosphor, SrAl 2O4:Eu2+,Dy3+, on top of the TiO2 nanoparticle layer to prepare working electrodes of the DSSCs. SrAl2O4:Eu2+,Dy3+ red-shifted the short UV wavelengths into the main absorption range of the dye commonly used in DSSCs. The SrAl2O4:Eu2+,Dy3+ layer also acted as a light-scattering layer to reduce the loss of visible light. Incident photon to current conversion efficiency measurements showed that the application of such phosphor materials enhanced light-harvesting. The open-circuit voltage was found to be higher in the modified DSSCs. The electrons produced by the SrAl2O4:Eu2+,Dy3+ particles contribute to the reduction of I3 - to I -, leading to a lower I3 - concentration in the electrolyte. This reduces the recapture of electrons injected in the conduction band of TiO2 by triiodide ions and promotes the open circuit voltage. The performance of the modified DSSC device was improved compared with the cell using a working electrode without this phosphor layer. An overall 13% improvement in conversion efficiency of modified DSSCs was achieved due to the presence of the phosphor layer.

AB - TiO2 nanoparticle-based dye-sensitized solar cells (DSSCs) were modified by depositing a layer of a long-persistent phosphor, SrAl 2O4:Eu2+,Dy3+, on top of the TiO2 nanoparticle layer to prepare working electrodes of the DSSCs. SrAl2O4:Eu2+,Dy3+ red-shifted the short UV wavelengths into the main absorption range of the dye commonly used in DSSCs. The SrAl2O4:Eu2+,Dy3+ layer also acted as a light-scattering layer to reduce the loss of visible light. Incident photon to current conversion efficiency measurements showed that the application of such phosphor materials enhanced light-harvesting. The open-circuit voltage was found to be higher in the modified DSSCs. The electrons produced by the SrAl2O4:Eu2+,Dy3+ particles contribute to the reduction of I3 - to I -, leading to a lower I3 - concentration in the electrolyte. This reduces the recapture of electrons injected in the conduction band of TiO2 by triiodide ions and promotes the open circuit voltage. The performance of the modified DSSC device was improved compared with the cell using a working electrode without this phosphor layer. An overall 13% improvement in conversion efficiency of modified DSSCs was achieved due to the presence of the phosphor layer.

UR - http://www.scopus.com/inward/record.url?scp=84883717170&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883717170&partnerID=8YFLogxK

U2 - 10.1021/jp307954n

DO - 10.1021/jp307954n

M3 - Article

VL - 117

SP - 17894

EP - 17900

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 35

ER -