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Issue 30, 2014

A hybrid lead iodide perovskite and lead sulfide QD heterojunction solar cell to obtain a panchromatic response

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Abstract

We report for the first time on co-sensitization between CH3NH3PbI3 perovskite and PbS quantum dots (QDs) in a heterojunction solar cell to obtain a panchromatic response from the visible to near IR regions. Following the deposition of the sensitizers on a TiO2 film, an Au thin layer is evaporated on top as a back contact. Importantly, the CH3NH3PbI3 nanoparticles and the PbS QDs used here simultaneously play both the role of a light harvester and a hole conductor, rendering superfluous the use of an additional hole transporting material. The mesoscopic CH3NH3PbI3 (perovskite)–PbS (QD)/TiO2 heterojunction solar cell shows an impressive short circuit photocurrent (Jsc) of 24.63 mA cm−2, much higher than those of the individual CH3NH3PbI3 perovskite and the PbS QD solar cells. The advent of such co-sensitization mesoscopic heterojunction solar cells paves the way to extend the absorbance region of the promising low cost, high-efficiency perovskite based solar cells.

Graphical abstract: A hybrid lead iodide perovskite and lead sulfide QD heterojunction solar cell to obtain a panchromatic response

Article information


Submitted
29 May 2014
Accepted
07 Jun 2014
First published
25 Jun 2014

J. Mater. Chem. A, 2014,2, 11586-11590
Article type
Communication
Author version available

A hybrid lead iodide perovskite and lead sulfide QD heterojunction solar cell to obtain a panchromatic response

L. Etgar, P. Gao, P. Qin, M. Graetzel and M. K. Nazeeruddin, J. Mater. Chem. A, 2014, 2, 11586 DOI: 10.1039/C4TA02711F

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