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Issue 6, 2017
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Passivated perovskite crystallization and stability in organic–inorganic halide solar cells by doping a donor polymer

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Abstract

Photovoltaic performance of planar perovskite hybrid solar cells (pero-HSCs) has been improved by mixing CH3NH3PbIxCl3−x and an electron donor polymer [N-9′′-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiaz-ole)] (PCDTBT). PCDTBT contains lone pairs of electrons due to the presence of S and N atoms, which could passivate the trap states of the perovskite layer and thus reduce the number of film defects. A Stonehenge-like structure could be formed by the interaction of CH3NH3PbIxCl3−x and PCDTBT, developing more ordered orientation crystallization and a high quality film morphology. The doped solar cells are characterized by their excellent photovoltaic properties and enhanced stability. When the doping concentration is 0.3 mg mL−1, the fabricated solar cell device exhibits an outstanding power conversion efficiency (PCE) of 15.76%, which represents a significant improvement with respect to the magnitude of 16% obtained for the reference device.

Graphical abstract: Passivated perovskite crystallization and stability in organic–inorganic halide solar cells by doping a donor polymer

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Article information


Submitted
16 Oct 2016
Accepted
04 Jan 2017
First published
04 Jan 2017

J. Mater. Chem. A, 2017,5, 2572-2579
Article type
Paper

Passivated perovskite crystallization and stability in organic–inorganic halide solar cells by doping a donor polymer

C. Zhang, M. Li, Z. Wang, Y. Jiang, H. Liu, Y. Yang, X. Gao and H. Ma, J. Mater. Chem. A, 2017, 5, 2572
DOI: 10.1039/C6TA08970D

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