Highly efficient perovskite solar cells based on a nanostructured WO3-TiO2 core-shell electron transporting material

Handle URI:
http://hdl.handle.net/10754/563964
Title:
Highly efficient perovskite solar cells based on a nanostructured WO3-TiO2 core-shell electron transporting material
Authors:
Mahmood, Khalid ( 0000-0003-2354-3908 ) ; Swain, Bhabani Sankar; Kirmani, Ahmad R. ( 0000-0002-8351-3762 ) ; Amassian, Aram ( 0000-0002-5734-1194 )
Abstract:
Until recently, only mesoporous TiO2 and ZnO were successfully demonstrated as electron transport layers (ETL) alongside the reports of ZrO2 and Al2O3 as scaffold materials in organometal halide perovskite solar cells, largely owing to ease of processing and to high power conversion efficiency. In this article, we explore tungsten trioxide (WO3)-based nanostructured and porous ETL materials directly grown hydrothermally with different morphologies such as nanoparticles, nanorods and nanosheet arrays. The nanostructure morphology strongly influences the photocurrent and efficiency in organometal halide perovskite solar cells. We find that the perovskite solar cells based on WO3 nanosheet arrays yield significantly enhanced photovoltaic performance as compared to nanoparticles and nanorod arrays due to good perovskite absorber infiltration in the porous scaffold and more rapid carrier transport. We further demonstrate that treating the WO3 nanostructures with an aqueous solution of TiCl4 reduces charge recombination at the perovskite/WO3 interface, resulting in the highest power conversion efficiency of 11.24% for devices based on WO3 nanosheet arrays. The successful demonstration of alternative ETL materials and nanostructures based on WO3 will open up new opportunities in the development of highly efficient perovskite solar cells. This journal is © The Royal Society of Chemistry 2015.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC); Materials Science and Engineering Program; Organic Electronics and Photovoltaics Group
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. A
Issue Date:
2015
DOI:
10.1039/c4ta04883k
Type:
Article
ISSN:
20507488
Sponsors:
Part of this work was supported by a Collaborative Research Grant from the Office of Competitive Research Funds and by the Career Development SABIC Chair held by AA.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorMahmood, Khaliden
dc.contributor.authorSwain, Bhabani Sankaren
dc.contributor.authorKirmani, Ahmad R.en
dc.contributor.authorAmassian, Aramen
dc.date.accessioned2015-08-03T12:21:07Zen
dc.date.available2015-08-03T12:21:07Zen
dc.date.issued2015en
dc.identifier.issn20507488en
dc.identifier.doi10.1039/c4ta04883ken
dc.identifier.urihttp://hdl.handle.net/10754/563964en
dc.description.abstractUntil recently, only mesoporous TiO2 and ZnO were successfully demonstrated as electron transport layers (ETL) alongside the reports of ZrO2 and Al2O3 as scaffold materials in organometal halide perovskite solar cells, largely owing to ease of processing and to high power conversion efficiency. In this article, we explore tungsten trioxide (WO3)-based nanostructured and porous ETL materials directly grown hydrothermally with different morphologies such as nanoparticles, nanorods and nanosheet arrays. The nanostructure morphology strongly influences the photocurrent and efficiency in organometal halide perovskite solar cells. We find that the perovskite solar cells based on WO3 nanosheet arrays yield significantly enhanced photovoltaic performance as compared to nanoparticles and nanorod arrays due to good perovskite absorber infiltration in the porous scaffold and more rapid carrier transport. We further demonstrate that treating the WO3 nanostructures with an aqueous solution of TiCl4 reduces charge recombination at the perovskite/WO3 interface, resulting in the highest power conversion efficiency of 11.24% for devices based on WO3 nanosheet arrays. The successful demonstration of alternative ETL materials and nanostructures based on WO3 will open up new opportunities in the development of highly efficient perovskite solar cells. This journal is © The Royal Society of Chemistry 2015.en
dc.description.sponsorshipPart of this work was supported by a Collaborative Research Grant from the Office of Competitive Research Funds and by the Career Development SABIC Chair held by AA.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleHighly efficient perovskite solar cells based on a nanostructured WO3-TiO2 core-shell electron transporting materialen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentOrganic Electronics and Photovoltaics Groupen
dc.identifier.journalJ. Mater. Chem. Aen
dc.contributor.institutionSchool of Advanced Materials Engineering, Kookmin UniversitySeoul, South Koreaen
kaust.authorMahmood, Khaliden
kaust.authorAmassian, Aramen
kaust.authorKirmani, Ahmad R.en
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