Issue 3, 2016

Boosting the performance of planar heterojunction perovskite solar cell by controlling the precursor purity of perovskite materials

Abstract

Perovskite solar cells (PSCs) have received great attention due to their high power conversion efficiency and low fabrication cost. The perovskite layer is usually prepared from a solution of precursors. We found that the PbI2 purity has a significant effect on the crystallinity, charge carrier dynamics, and photovoltaic properties of the perovskite films. Planar heterojunction PSCs using highly pure PbI2 showed a high power conversion efficiency (PCE) of 16.4%, which was higher than that of control PSCs with low purity PbI2 by 30–40%. Steady-state photoluminescence (PL), time-resolved PL (TR-PL) and femtosecond transient absorption measurements (FS-TA) revealed that impurities can lower the electron lifetime and increase the non-radiative recombination. This study implies that the PCEs of the perovskite solar cell devices could be further boosted by controlling the precursor purity.

Graphical abstract: Boosting the performance of planar heterojunction perovskite solar cell by controlling the precursor purity of perovskite materials

Supplementary files

Article information

Article type
Paper
Submitted
20 oct. 2015
Accepted
28 nov. 2015
First published
01 déc. 2015

J. Mater. Chem. A, 2016,4, 887-893

Boosting the performance of planar heterojunction perovskite solar cell by controlling the precursor purity of perovskite materials

J. Chang, H. Zhu, B. Li, F. H. Isikgor, Y. Hao, Q. Xu and J. Ouyang, J. Mater. Chem. A, 2016, 4, 887 DOI: 10.1039/C5TA08398B

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