Improving the long-term stability of perovskite solar cells with a porous Al2O3 overlayer
Improving the long-term stability of perovskite solar cells with a porous Al2O3 overlayer
Hybrid perovskites represent a new paradigm for photovoltaics, which have the potential to overcome the performance limits of current technologies and achieve low cost and high versatility. However, an efficiency drop is often observed within the first few hundred hours of device operation, which could become an important issue. Here, we demonstrate that the electrode’s metal migrating through the hole transporting material (HTM) layer and eventually contacting the perovskite is in part responsible for this early device degradation. We show that depositing the HTM within an insulating mesoporous “buffer layer” comprised of Al2O3 nanoparticles prevents the metal electrode migration while allowing for precise control of the HTM thickness. This enables an improvement in the solar cell fill factor and prevents degradation of the device after 350 h of operation
perovskite solar cells, stability, buffer layer, electric shunting pathway, photovoltaic, aging test
432-437
Guarnera, Simone
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Abate, Antonio
509f3e64-115d-48f9-8df5-c588998c192d
Zhang, Wei
fa6d7061-bfce-48c0-879c-925302213c1a
Foster, Jamie
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Richardson, Giles
3fd8e08f-e615-42bb-a1ff-3346c5847b91
Petrozza, Annamaria
3b0b0eb2-0084-4ee2-a320-930e9284b736
Snaith, Henry
376f91a3-8cd3-4b04-abe2-9f939e7de62b
Guarnera, Simone
119b4d36-0be0-4b46-bec7-26ee4bc9d964
Abate, Antonio
509f3e64-115d-48f9-8df5-c588998c192d
Zhang, Wei
fa6d7061-bfce-48c0-879c-925302213c1a
Foster, Jamie
6b1c0d1d-d594-4495-963f-573f2f0d1d19
Richardson, Giles
3fd8e08f-e615-42bb-a1ff-3346c5847b91
Petrozza, Annamaria
3b0b0eb2-0084-4ee2-a320-930e9284b736
Snaith, Henry
376f91a3-8cd3-4b04-abe2-9f939e7de62b
Guarnera, Simone, Abate, Antonio, Zhang, Wei, Foster, Jamie, Richardson, Giles, Petrozza, Annamaria and Snaith, Henry
(2015)
Improving the long-term stability of perovskite solar cells with a porous Al2O3 overlayer.
The Journal of Physical Chemistry Letters, 6, .
(doi:10.1021/jz502703p).
Abstract
Hybrid perovskites represent a new paradigm for photovoltaics, which have the potential to overcome the performance limits of current technologies and achieve low cost and high versatility. However, an efficiency drop is often observed within the first few hundred hours of device operation, which could become an important issue. Here, we demonstrate that the electrode’s metal migrating through the hole transporting material (HTM) layer and eventually contacting the perovskite is in part responsible for this early device degradation. We show that depositing the HTM within an insulating mesoporous “buffer layer” comprised of Al2O3 nanoparticles prevents the metal electrode migration while allowing for precise control of the HTM thickness. This enables an improvement in the solar cell fill factor and prevents degradation of the device after 350 h of operation
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e-pub ahead of print date: 13 January 2015
Keywords:
perovskite solar cells, stability, buffer layer, electric shunting pathway, photovoltaic, aging test
Organisations:
Applied Mathematics
Identifiers
Local EPrints ID: 381661
URI: http://eprints.soton.ac.uk/id/eprint/381661
ISSN: 1948-7185
PURE UUID: 8a59ec41-c2cd-49cf-8933-4273118a5321
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Date deposited: 12 Oct 2015 12:36
Last modified: 15 Mar 2024 03:33
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Contributors
Author:
Simone Guarnera
Author:
Antonio Abate
Author:
Wei Zhang
Author:
Jamie Foster
Author:
Annamaria Petrozza
Author:
Henry Snaith
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