High-Performance Inverted Perovskite Solar Cells with Mesoporous NiOx Hole Transport Layer by Electrochemical Deposition
Perovskite solar cells (PSCs) based on a NiO x hole transport layer (HTL) with an inverted p–i–n configuration have yielded highly efficient and relatively stable devices. Here, we develop a simple electrochemical deposition method for quickly and evenly preparing a mesoporous NiO x film. It is demo...
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Published in | ACS omega Vol. 3; no. 12; pp. 18434 - 18443 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
American Chemical Society
01.12.2018
|
Online Access | Get full text |
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Summary: | Perovskite solar cells (PSCs) based
on a NiO
x
hole transport layer (HTL) with
an inverted p–i–n
configuration have yielded highly efficient and relatively stable
devices. Here, we develop a simple electrochemical deposition method
for quickly and evenly preparing a mesoporous NiO
x
film. It is demonstrated that the increasing thickness
and decreasing surface roughness of the NiO
x
film are beneficial for light transmission. The optimal condition
for preparing NiO
x
films is achieved by
adjusting the deposition time at a certain applied current density,
which exhibits excellent optical transmittance and suitable thickness
and band gap, thus reducing optical loss and enhancing hole extraction
at the interface between HTL and the perovskite layer and therefore
improving photovoltaic performances. The finite-difference time-domain
simulation confirms the optimal thickness of the NiO
x
layer and coincides with our experiment results. An optimal
power conversion efficiency (PCE) of 17.77% with an active area of
0.25 cm
2
is achieved. The prepared device shows negligible
hysteresis, high reproducibility, and high uniformity with a PCE difference
of 2% for measuring the different sites from edge to center. This
simple fabrication process paves a novel way to the evolution of PSCs
based on NiO
x
and rapid commercialization. |
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ISSN: | 2470-1343 |
DOI: | 10.1021/acsomega.8b02612 |