Issue 9, 2015

p-Type mesoscopic NiO as an active interfacial layer for carbon counter electrode based perovskite solar cells

Abstract

Replacement of the ZrO2 insulator layer in the state-of-the-art TiO2/ZrO2/carbon structure by mesoscopic p-type NiO particles led to 39% increase of energy conversion efficiency of hole-conductor-free organometallic perovskite heterojunction solar cells with carbon counter electrodes. In these cells, the light absorber, CH3NH3PbI3, formed instantly inside the pores of the entire TiO2/NiO/carbon layer upon sequential deposition of PbI2 and CH3NH3I. Photoluminescence, impedance spectroscopy and transient photovoltage decay measurements have revealed that introduction of NiO extended the electron lifetime and augmented the hole extraction of the counter electrode. As a result, the photocurrent and open-circuit voltage both increased, resulting in a cell with impressive energy conversion efficiency of 11.4% under AM1.5G conditions.

Graphical abstract: p-Type mesoscopic NiO as an active interfacial layer for carbon counter electrode based perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
22 Sep 2014
Accepted
05 Nov 2014
First published
05 Nov 2014

Dalton Trans., 2015,44, 3967-3973

Author version available

p-Type mesoscopic NiO as an active interfacial layer for carbon counter electrode based perovskite solar cells

Z. Liu, M. Zhang, X. Xu, L. Bu, W. Zhang, W. Li, Z. Zhao, M. Wang, Y. Cheng and H. He, Dalton Trans., 2015, 44, 3967 DOI: 10.1039/C4DT02904F

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