TY - JOUR
T1 - Ultrafast Charge Transfer and Upconversion in Zinc β-Tetraaminophthalocyanine-Functionalized PbS Nanostructures Probed by Transient Absorption Spectroscopy
AU - Lauth, Jannika
AU - Grimaldi, Gianluca
AU - Kinge, Sachin
AU - Houtepen, Arjan J.
AU - Siebbeles, Laurens D.A.
AU - Scheele, Marcus
PY - 2017/11/6
Y1 - 2017/11/6
N2 - We functionalize PbS nanocrystals with the organic semiconductor Zn β-tetraaminophthalocyanine to design a nanostructured solid-state material with frequent organic–inorganic interfaces. By transient absorption and fluorescence spectroscopy, we investigate the optoelectronic response of this hybrid material under near-infrared excitation to find efficient charge transfer from the nanocrystals to the molecules. We demonstrate that the material undergoes cooperative sensitization of two nanocrystals followed by photon upconversion and singlet emission of the organic semiconductor. The upconversion efficiency resembles that of comparable systems in solution, which we attribute to the large amount of interfaces present in this solid-state film. We anticipate that this synthetic strategy has great prospects for increasing the open-circuit voltage in PbS nanocrystal-based solar cells.
AB - We functionalize PbS nanocrystals with the organic semiconductor Zn β-tetraaminophthalocyanine to design a nanostructured solid-state material with frequent organic–inorganic interfaces. By transient absorption and fluorescence spectroscopy, we investigate the optoelectronic response of this hybrid material under near-infrared excitation to find efficient charge transfer from the nanocrystals to the molecules. We demonstrate that the material undergoes cooperative sensitization of two nanocrystals followed by photon upconversion and singlet emission of the organic semiconductor. The upconversion efficiency resembles that of comparable systems in solution, which we attribute to the large amount of interfaces present in this solid-state film. We anticipate that this synthetic strategy has great prospects for increasing the open-circuit voltage in PbS nanocrystal-based solar cells.
KW - cooperative sensitization
KW - coupled organic–inorganic nanostructures
KW - transient absorption
KW - upconversion
UR - http://www.scopus.com/inward/record.url?scp=85032286913&partnerID=8YFLogxK
U2 - 10.1002/anie.201707443
DO - 10.1002/anie.201707443
M3 - Article
AN - SCOPUS:85032286913
SN - 1433-7851
VL - 56
SP - 14061
EP - 14065
JO - Angewandte Chemie (International Edition)
JF - Angewandte Chemie (International Edition)
IS - 45
ER -