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Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer

[Image: see text] The electrically insulating space layer takes a fundamental role in monolithic carbon-graphite based perovskite solar cells (PSCs) and it has been established to prevent the charge recombination of electrons at the mp-TiO(2)/carbon-graphite (CG) interface. Thick 1 μm printed layers...

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Autores principales: Mathiazhagan, Gayathri, Wagner, Lukas, Bogati, Shankar, Ünal, Kübra Yasaroglu, Bogachuk, Dmitry, Kroyer, Thomas, Mastroianni, Simone, Hinsch, Andreas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7123616/
https://www.ncbi.nlm.nih.gov/pubmed/32270136
http://dx.doi.org/10.1021/acsanm.9b02563
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author Mathiazhagan, Gayathri
Wagner, Lukas
Bogati, Shankar
Ünal, Kübra Yasaroglu
Bogachuk, Dmitry
Kroyer, Thomas
Mastroianni, Simone
Hinsch, Andreas
author_facet Mathiazhagan, Gayathri
Wagner, Lukas
Bogati, Shankar
Ünal, Kübra Yasaroglu
Bogachuk, Dmitry
Kroyer, Thomas
Mastroianni, Simone
Hinsch, Andreas
author_sort Mathiazhagan, Gayathri
collection PubMed
description [Image: see text] The electrically insulating space layer takes a fundamental role in monolithic carbon-graphite based perovskite solar cells (PSCs) and it has been established to prevent the charge recombination of electrons at the mp-TiO(2)/carbon-graphite (CG) interface. Thick 1 μm printed layers are commonly used for this purpose in the established triple-mesoscopic structures to avoid ohmic shunts and to achieve a high open circuit voltage. In this work, we have developed a reproducible large-area procedure to replace this thick space layer with an ultra-thin dense 40 nm sputtered Al(2)O(3) which acts as a highly electrically insulating layer preventing ohmic shunts. Herewith, transport limitations related so far to the hole diffusion path length inside the thick mesoporous space layer have been omitted by concept. This will pave the way toward the development of next generation double-mesoscopic carbon-graphite-based PSCs with highest efficiencies. Scanning electron microscope, energy dispersive X-ray analysis, and atomic force microscopy measurements show the presence of a fully oxidized sputtered Al(2)O(3) layer forming a pseudo-porous covering of the underlying mesoporous layer. The thickness has been finely tuned to achieve both electrical isolation and optimal infiltration of the perovskite solution allowing full percolation and crystallization. Photo voltage decay, light-dependent, and time-dependent photoluminescence measurements showed that the optimal 40 nm thick Al(2)O(3) not only prevents ohmic shunts but also efficiently reduces the charge recombination at the mp-TiO(2)/CG interface and, at the same time, allows efficient hole diffusion through the perovskite crystals embedded in its pseudo-pores. Thus, a stable V(OC) of 1 V using CH(3)NH(3)PbI(3) perovskite has been achieved under full sun AM 1.5 G with a stabilized device performance of 12.1%.
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spelling pubmed-71236162020-04-06 Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer Mathiazhagan, Gayathri Wagner, Lukas Bogati, Shankar Ünal, Kübra Yasaroglu Bogachuk, Dmitry Kroyer, Thomas Mastroianni, Simone Hinsch, Andreas ACS Appl Nano Mater [Image: see text] The electrically insulating space layer takes a fundamental role in monolithic carbon-graphite based perovskite solar cells (PSCs) and it has been established to prevent the charge recombination of electrons at the mp-TiO(2)/carbon-graphite (CG) interface. Thick 1 μm printed layers are commonly used for this purpose in the established triple-mesoscopic structures to avoid ohmic shunts and to achieve a high open circuit voltage. In this work, we have developed a reproducible large-area procedure to replace this thick space layer with an ultra-thin dense 40 nm sputtered Al(2)O(3) which acts as a highly electrically insulating layer preventing ohmic shunts. Herewith, transport limitations related so far to the hole diffusion path length inside the thick mesoporous space layer have been omitted by concept. This will pave the way toward the development of next generation double-mesoscopic carbon-graphite-based PSCs with highest efficiencies. Scanning electron microscope, energy dispersive X-ray analysis, and atomic force microscopy measurements show the presence of a fully oxidized sputtered Al(2)O(3) layer forming a pseudo-porous covering of the underlying mesoporous layer. The thickness has been finely tuned to achieve both electrical isolation and optimal infiltration of the perovskite solution allowing full percolation and crystallization. Photo voltage decay, light-dependent, and time-dependent photoluminescence measurements showed that the optimal 40 nm thick Al(2)O(3) not only prevents ohmic shunts but also efficiently reduces the charge recombination at the mp-TiO(2)/CG interface and, at the same time, allows efficient hole diffusion through the perovskite crystals embedded in its pseudo-pores. Thus, a stable V(OC) of 1 V using CH(3)NH(3)PbI(3) perovskite has been achieved under full sun AM 1.5 G with a stabilized device performance of 12.1%. American Chemical Society 2020-02-05 2020-03-27 /pmc/articles/PMC7123616/ /pubmed/32270136 http://dx.doi.org/10.1021/acsanm.9b02563 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Mathiazhagan, Gayathri
Wagner, Lukas
Bogati, Shankar
Ünal, Kübra Yasaroglu
Bogachuk, Dmitry
Kroyer, Thomas
Mastroianni, Simone
Hinsch, Andreas
Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer
title Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer
title_full Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer
title_fullStr Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer
title_full_unstemmed Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer
title_short Double-Mesoscopic Hole-Transport-Material-Free Perovskite Solar Cells: Overcoming Charge-Transport Limitation by Sputtered Ultrathin Al(2)O(3) Isolating Layer
title_sort double-mesoscopic hole-transport-material-free perovskite solar cells: overcoming charge-transport limitation by sputtered ultrathin al(2)o(3) isolating layer
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7123616/
https://www.ncbi.nlm.nih.gov/pubmed/32270136
http://dx.doi.org/10.1021/acsanm.9b02563
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