Quantum-dot-sensitized solar cells with water-soluble and air-stable PbS quantum dots

A.N. Jumabekov; F. Deschler; D. Böhm; L.M. Peter; J. Feldmann; T. Bein

doi:10.1021/jp4110773

Quantum-dot-sensitized solar cells with water-soluble and air-stable PbS quantum dots

A.N. Jumabekov, F. Deschler, D. Böhm, L.M. Peter, J. Feldmann, T. Bein

Research output: Contribution to journal › Article › peer-review

33 Citations (SciVal)

Abstract

The sensitization of dispersed P25 TiO nanoparticles (NPs) and macroporous TiO films with water-soluble and air-stable PbS quantum dots (QDs) capped with l-glutathione (GSH) ligands was investigated. Optimum sensitization was achieved by careful adjustment of the surface charges of TiO and PbS QDs by controlling the pH of the QD solution. Efficient electron transfer from photoexcited PbS QDs via the GSH ligands into the conduction band of TiO was demonstrated by photoluminescence (PL) spectroscopy of PbS-sensitized P25 nanoparticles. The PbS QD-sensitized porous TiO electrodes were used to prepare quantum-dot-sensitized solar cells (QDSSCs) utilizing a CuS counter electrode and aqueous polysulfide electrolyte. Cells with up to 64% injection efficiency, 1.1% AM 1.5 conversion efficiency, and short circuit current density of 7.4 mA cm were obtained. The physical parameters of the cells were investigated using impedance spectroscopy.

Original language	English
Pages (from-to)	5142-5149
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	10
Early online date	11 Feb 2014
DOIs	https://doi.org/10.1021/jp4110773
Publication status	Published - 13 Mar 2014

Access to Document

10.1021/jp4110773

Cite this

@article{224fa11c226a4c938067ee3cea069e08,

title = "Quantum-dot-sensitized solar cells with water-soluble and air-stable PbS quantum dots",

abstract = "The sensitization of dispersed P25 TiO nanoparticles (NPs) and macroporous TiO films with water-soluble and air-stable PbS quantum dots (QDs) capped with l-glutathione (GSH) ligands was investigated. Optimum sensitization was achieved by careful adjustment of the surface charges of TiO and PbS QDs by controlling the pH of the QD solution. Efficient electron transfer from photoexcited PbS QDs via the GSH ligands into the conduction band of TiO was demonstrated by photoluminescence (PL) spectroscopy of PbS-sensitized P25 nanoparticles. The PbS QD-sensitized porous TiO electrodes were used to prepare quantum-dot-sensitized solar cells (QDSSCs) utilizing a CuS counter electrode and aqueous polysulfide electrolyte. Cells with up to 64% injection efficiency, 1.1% AM 1.5 conversion efficiency, and short circuit current density of 7.4 mA cm were obtained. The physical parameters of the cells were investigated using impedance spectroscopy. ",

author = "A.N. Jumabekov and F. Deschler and D. B{\"o}hm and L.M. Peter and J. Feldmann and T. Bein",

year = "2014",

month = mar,

day = "13",

doi = "10.1021/jp4110773",

language = "English",

volume = "118",

pages = "5142--5149",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "10",

}

TY - JOUR

T1 - Quantum-dot-sensitized solar cells with water-soluble and air-stable PbS quantum dots

AU - Jumabekov, A.N.

AU - Deschler, F.

AU - Böhm, D.

AU - Peter, L.M.

AU - Feldmann, J.

AU - Bein, T.

PY - 2014/3/13

Y1 - 2014/3/13

N2 - The sensitization of dispersed P25 TiO nanoparticles (NPs) and macroporous TiO films with water-soluble and air-stable PbS quantum dots (QDs) capped with l-glutathione (GSH) ligands was investigated. Optimum sensitization was achieved by careful adjustment of the surface charges of TiO and PbS QDs by controlling the pH of the QD solution. Efficient electron transfer from photoexcited PbS QDs via the GSH ligands into the conduction band of TiO was demonstrated by photoluminescence (PL) spectroscopy of PbS-sensitized P25 nanoparticles. The PbS QD-sensitized porous TiO electrodes were used to prepare quantum-dot-sensitized solar cells (QDSSCs) utilizing a CuS counter electrode and aqueous polysulfide electrolyte. Cells with up to 64% injection efficiency, 1.1% AM 1.5 conversion efficiency, and short circuit current density of 7.4 mA cm were obtained. The physical parameters of the cells were investigated using impedance spectroscopy.

AB - The sensitization of dispersed P25 TiO nanoparticles (NPs) and macroporous TiO films with water-soluble and air-stable PbS quantum dots (QDs) capped with l-glutathione (GSH) ligands was investigated. Optimum sensitization was achieved by careful adjustment of the surface charges of TiO and PbS QDs by controlling the pH of the QD solution. Efficient electron transfer from photoexcited PbS QDs via the GSH ligands into the conduction band of TiO was demonstrated by photoluminescence (PL) spectroscopy of PbS-sensitized P25 nanoparticles. The PbS QD-sensitized porous TiO electrodes were used to prepare quantum-dot-sensitized solar cells (QDSSCs) utilizing a CuS counter electrode and aqueous polysulfide electrolyte. Cells with up to 64% injection efficiency, 1.1% AM 1.5 conversion efficiency, and short circuit current density of 7.4 mA cm were obtained. The physical parameters of the cells were investigated using impedance spectroscopy.

UR - http://www.scopus.com/inward/record.url?scp=84896378963&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1021/jp4110773

U2 - 10.1021/jp4110773

DO - 10.1021/jp4110773

M3 - Article

AN - SCOPUS:84896378963

SN - 1932-7447

VL - 118

SP - 5142

EP - 5149

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 10

ER -

Quantum-dot-sensitized solar cells with water-soluble and air-stable PbS quantum dots

Abstract

Access to Document

Other files and links

Fingerprint

Cite this